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* [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-03 17:48 ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: vincenzo.frascino, ard.biesheuvel, ndesaulniers, catalin.marinas,
	will, tglx, luto

This patch series is meant to address the various compilation issues
reported recently for arm64 vdso32 [1].

From v4, the series contains a cleanup of lib/vdso Kconfig as well since
CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Reported-by: Will Deacon <will@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>

[1] https://www.spinics.net/lists/kernel/msg3260702.html

---

v5:
  - Add a check on empty CROSS_COMPILE_COMPAT

v4:
  - Drop __arm64__ workaround
  - Remove COMPAT_CC_IS_GCC check
  - Remove unused configuration parameter from lib/vdso
  - Address Review Comments

v3:
  - Exposed COMPATCC
  - Addressed Review Comments
 
v2:
  - Fixed binutils detection
  - Addressed review comments

Vincenzo Frascino (6):
  arm64: vdso32: Fix syncconfig errors.
  arm64: vdso32: Detect binutils support for dmb ishld
  arm64: Remove gettimeofday.S
  arm64: vdso32: Remove jump label config option in Makefile
  arm64: Remove vdso_datapage.h
  lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO

 arch/arm64/Kconfig                           |  5 ++-
 arch/arm64/Makefile                          | 18 +++--------
 arch/arm64/include/asm/vdso/compat_barrier.h |  2 +-
 arch/arm64/include/asm/vdso_datapage.h       | 33 --------------------
 arch/arm64/kernel/vdso/gettimeofday.S        |  0
 arch/arm64/kernel/vdso32/Makefile            | 14 ++++++---
 lib/vdso/Kconfig                             |  9 ------
 7 files changed, 19 insertions(+), 62 deletions(-)
 delete mode 100644 arch/arm64/include/asm/vdso_datapage.h
 delete mode 100644 arch/arm64/kernel/vdso/gettimeofday.S

-- 
2.23.0


^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-03 17:48 ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, luto, tglx,
	vincenzo.frascino, will

This patch series is meant to address the various compilation issues
reported recently for arm64 vdso32 [1].

From v4, the series contains a cleanup of lib/vdso Kconfig as well since
CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Reported-by: Will Deacon <will@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>

[1] https://www.spinics.net/lists/kernel/msg3260702.html

---

v5:
  - Add a check on empty CROSS_COMPILE_COMPAT

v4:
  - Drop __arm64__ workaround
  - Remove COMPAT_CC_IS_GCC check
  - Remove unused configuration parameter from lib/vdso
  - Address Review Comments

v3:
  - Exposed COMPATCC
  - Addressed Review Comments
 
v2:
  - Fixed binutils detection
  - Addressed review comments

Vincenzo Frascino (6):
  arm64: vdso32: Fix syncconfig errors.
  arm64: vdso32: Detect binutils support for dmb ishld
  arm64: Remove gettimeofday.S
  arm64: vdso32: Remove jump label config option in Makefile
  arm64: Remove vdso_datapage.h
  lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO

 arch/arm64/Kconfig                           |  5 ++-
 arch/arm64/Makefile                          | 18 +++--------
 arch/arm64/include/asm/vdso/compat_barrier.h |  2 +-
 arch/arm64/include/asm/vdso_datapage.h       | 33 --------------------
 arch/arm64/kernel/vdso/gettimeofday.S        |  0
 arch/arm64/kernel/vdso32/Makefile            | 14 ++++++---
 lib/vdso/Kconfig                             |  9 ------
 7 files changed, 19 insertions(+), 62 deletions(-)
 delete mode 100644 arch/arm64/include/asm/vdso_datapage.h
 delete mode 100644 arch/arm64/kernel/vdso/gettimeofday.S

-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 1/6] arm64: vdso32: Fix syncconfig errors.
  2019-10-03 17:48 ` Vincenzo Frascino
@ 2019-10-03 17:48   ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: vincenzo.frascino, ard.biesheuvel, ndesaulniers, catalin.marinas,
	will, tglx, luto

The .config file and the generated include/config/auto.conf can
end up out of sync after a set of commands since
CONFIG_CROSS_COMPILE_COMPAT_VDSO is not updated correctly.

The sequence can be reproduced as follows:

$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig
[...]
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig
[set CONFIG_CROSS_COMPILE_COMPAT_VDSO="arm-linux-gnueabihf-"]
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-

Which results in:

arch/arm64/Makefile:62: CROSS_COMPILE_COMPAT not defined or empty,
the compat vDSO will not be built

even though the compat vDSO has been built:

$ file arch/arm64/kernel/vdso32/vdso.so
arch/arm64/kernel/vdso32/vdso.so: ELF 32-bit LSB pie executable, ARM,
EABI5 version 1 (SYSV), dynamically linked,
BuildID[sha1]=c67f6c786f2d2d6f86c71f708595594aa25247f6, stripped

A similar case that involves changing the configuration parameter multiple
times can be reconducted to the same family of problems.

The reason behind it comes from the fact that the master Makefile includes
that architecture Makefile twice, once before the syncconfig and one after.
Since the synchronization of the files happens only upon syncconfig, the
architecture Makefile included before this event does not see the change in
configuration.

As a consequence of this it is not possible to handle the cross compiler
definitions inside the architecture Makefile.

Address the problem refactoring the arm64 main Makefile and removing the
misleading warnings.

As a consequence of this it is not possible anymore to set the compat
cross compiler from menuconfig but it requires to be exported via
command line.

E.g.:

$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
CROSS_COMPILE_COMPAT=arm-linux-gnueabihf-

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 arch/arm64/Kconfig                |  5 ++++-
 arch/arm64/Makefile               | 18 +++++-------------
 arch/arm64/kernel/vdso32/Makefile |  2 --
 3 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 37c610963eee..b4cc8fb5344c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -110,7 +110,7 @@ config ARM64
 	select GENERIC_STRNLEN_USER
 	select GENERIC_TIME_VSYSCALL
 	select GENERIC_GETTIMEOFDAY
-	select GENERIC_COMPAT_VDSO if (!CPU_BIG_ENDIAN && COMPAT)
+	select GENERIC_COMPAT_VDSO if (!CPU_BIG_ENDIAN && COMPAT && !COMPATCC_EMPTY)
 	select HANDLE_DOMAIN_IRQ
 	select HARDIRQS_SW_RESEND
 	select HAVE_PCI
@@ -313,6 +313,9 @@ config KASAN_SHADOW_OFFSET
 	default 0xeffffff900000000 if ARM64_VA_BITS_36 && KASAN_SW_TAGS
 	default 0xffffffffffffffff
 
+config COMPATCC_EMPTY
+	def_bool $(success,test -z "${CROSS_COMPILE_COMPAT}")
+
 source "arch/arm64/Kconfig.platforms"
 
 menu "Kernel Features"
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 84a3d502c5a5..dfa6a5cb99e4 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -53,20 +53,12 @@ $(warning Detected assembler with broken .inst; disassembly will be unreliable)
   endif
 endif
 
+COMPATCC ?= $(CROSS_COMPILE_COMPAT)gcc
+export COMPATCC
+
 ifeq ($(CONFIG_GENERIC_COMPAT_VDSO), y)
-  CROSS_COMPILE_COMPAT ?= $(CONFIG_CROSS_COMPILE_COMPAT_VDSO:"%"=%)
-
-  ifeq ($(CONFIG_CC_IS_CLANG), y)
-    $(warning CROSS_COMPILE_COMPAT is clang, the compat vDSO will not be built)
-  else ifeq ($(strip $(CROSS_COMPILE_COMPAT)),)
-    $(warning CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built)
-  else ifeq ($(shell which $(CROSS_COMPILE_COMPAT)gcc 2> /dev/null),)
-    $(error $(CROSS_COMPILE_COMPAT)gcc not found, check CROSS_COMPILE_COMPAT)
-  else
-    export CROSS_COMPILE_COMPAT
-    export CONFIG_COMPAT_VDSO := y
-    compat_vdso := -DCONFIG_COMPAT_VDSO=1
-  endif
+  export CONFIG_COMPAT_VDSO := y
+  compat_vdso := -DCONFIG_COMPAT_VDSO=1
 endif
 
 KBUILD_CFLAGS	+= -mgeneral-regs-only $(lseinstr) $(brokengasinst)	\
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 1fba0776ed40..19e0d3115ffe 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -8,8 +8,6 @@
 ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT|R_ARM_GLOB_DAT|R_ARM_ABS32
 include $(srctree)/lib/vdso/Makefile
 
-COMPATCC := $(CROSS_COMPILE_COMPAT)gcc
-
 # Same as cc-*option, but using COMPATCC instead of CC
 cc32-option = $(call try-run,\
         $(COMPATCC) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
-- 
2.23.0


^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 1/6] arm64: vdso32: Fix syncconfig errors.
@ 2019-10-03 17:48   ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, luto, tglx,
	vincenzo.frascino, will

The .config file and the generated include/config/auto.conf can
end up out of sync after a set of commands since
CONFIG_CROSS_COMPILE_COMPAT_VDSO is not updated correctly.

The sequence can be reproduced as follows:

$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig
[...]
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig
[set CONFIG_CROSS_COMPILE_COMPAT_VDSO="arm-linux-gnueabihf-"]
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-

Which results in:

arch/arm64/Makefile:62: CROSS_COMPILE_COMPAT not defined or empty,
the compat vDSO will not be built

even though the compat vDSO has been built:

$ file arch/arm64/kernel/vdso32/vdso.so
arch/arm64/kernel/vdso32/vdso.so: ELF 32-bit LSB pie executable, ARM,
EABI5 version 1 (SYSV), dynamically linked,
BuildID[sha1]=c67f6c786f2d2d6f86c71f708595594aa25247f6, stripped

A similar case that involves changing the configuration parameter multiple
times can be reconducted to the same family of problems.

The reason behind it comes from the fact that the master Makefile includes
that architecture Makefile twice, once before the syncconfig and one after.
Since the synchronization of the files happens only upon syncconfig, the
architecture Makefile included before this event does not see the change in
configuration.

As a consequence of this it is not possible to handle the cross compiler
definitions inside the architecture Makefile.

Address the problem refactoring the arm64 main Makefile and removing the
misleading warnings.

As a consequence of this it is not possible anymore to set the compat
cross compiler from menuconfig but it requires to be exported via
command line.

E.g.:

$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
CROSS_COMPILE_COMPAT=arm-linux-gnueabihf-

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 arch/arm64/Kconfig                |  5 ++++-
 arch/arm64/Makefile               | 18 +++++-------------
 arch/arm64/kernel/vdso32/Makefile |  2 --
 3 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 37c610963eee..b4cc8fb5344c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -110,7 +110,7 @@ config ARM64
 	select GENERIC_STRNLEN_USER
 	select GENERIC_TIME_VSYSCALL
 	select GENERIC_GETTIMEOFDAY
-	select GENERIC_COMPAT_VDSO if (!CPU_BIG_ENDIAN && COMPAT)
+	select GENERIC_COMPAT_VDSO if (!CPU_BIG_ENDIAN && COMPAT && !COMPATCC_EMPTY)
 	select HANDLE_DOMAIN_IRQ
 	select HARDIRQS_SW_RESEND
 	select HAVE_PCI
@@ -313,6 +313,9 @@ config KASAN_SHADOW_OFFSET
 	default 0xeffffff900000000 if ARM64_VA_BITS_36 && KASAN_SW_TAGS
 	default 0xffffffffffffffff
 
+config COMPATCC_EMPTY
+	def_bool $(success,test -z "${CROSS_COMPILE_COMPAT}")
+
 source "arch/arm64/Kconfig.platforms"
 
 menu "Kernel Features"
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 84a3d502c5a5..dfa6a5cb99e4 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -53,20 +53,12 @@ $(warning Detected assembler with broken .inst; disassembly will be unreliable)
   endif
 endif
 
+COMPATCC ?= $(CROSS_COMPILE_COMPAT)gcc
+export COMPATCC
+
 ifeq ($(CONFIG_GENERIC_COMPAT_VDSO), y)
-  CROSS_COMPILE_COMPAT ?= $(CONFIG_CROSS_COMPILE_COMPAT_VDSO:"%"=%)
-
-  ifeq ($(CONFIG_CC_IS_CLANG), y)
-    $(warning CROSS_COMPILE_COMPAT is clang, the compat vDSO will not be built)
-  else ifeq ($(strip $(CROSS_COMPILE_COMPAT)),)
-    $(warning CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built)
-  else ifeq ($(shell which $(CROSS_COMPILE_COMPAT)gcc 2> /dev/null),)
-    $(error $(CROSS_COMPILE_COMPAT)gcc not found, check CROSS_COMPILE_COMPAT)
-  else
-    export CROSS_COMPILE_COMPAT
-    export CONFIG_COMPAT_VDSO := y
-    compat_vdso := -DCONFIG_COMPAT_VDSO=1
-  endif
+  export CONFIG_COMPAT_VDSO := y
+  compat_vdso := -DCONFIG_COMPAT_VDSO=1
 endif
 
 KBUILD_CFLAGS	+= -mgeneral-regs-only $(lseinstr) $(brokengasinst)	\
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 1fba0776ed40..19e0d3115ffe 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -8,8 +8,6 @@
 ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT|R_ARM_GLOB_DAT|R_ARM_ABS32
 include $(srctree)/lib/vdso/Makefile
 
-COMPATCC := $(CROSS_COMPILE_COMPAT)gcc
-
 # Same as cc-*option, but using COMPATCC instead of CC
 cc32-option = $(call try-run,\
         $(COMPATCC) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
  2019-10-03 17:48 ` Vincenzo Frascino
@ 2019-10-03 17:48   ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: vincenzo.frascino, ard.biesheuvel, ndesaulniers, catalin.marinas,
	will, tglx, luto

Older versions of binutils that do not support certain types of memory
barriers can cause build failure of the vdso32 library.

Add a compilation time mechanism that detects if binutils supports those
instructions and configure the kernel accordingly.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/include/asm/vdso/compat_barrier.h | 2 +-
 arch/arm64/kernel/vdso32/Makefile            | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h
index fb60a88b5ed4..3fd8fd6d8fc2 100644
--- a/arch/arm64/include/asm/vdso/compat_barrier.h
+++ b/arch/arm64/include/asm/vdso/compat_barrier.h
@@ -20,7 +20,7 @@
 
 #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
 
-#if __LINUX_ARM_ARCH__ >= 8
+#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD)
 #define aarch32_smp_mb()	dmb(ish)
 #define aarch32_smp_rmb()	dmb(ishld)
 #define aarch32_smp_wmb()	dmb(ishst)
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 19e0d3115ffe..77aa61340374 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -15,6 +15,8 @@ cc32-disable-warning = $(call try-run,\
 	$(COMPATCC) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
 cc32-ldoption = $(call try-run,\
         $(COMPATCC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
+cc32-as-instr = $(call try-run,\
+	printf "%b\n" "$(1)" | $(COMPATCC) $(VDSO_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
 
 # We cannot use the global flags to compile the vDSO files, the main reason
 # being that the 32-bit compiler may be older than the main (64-bit) compiler
@@ -53,6 +55,7 @@ endif
 VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector
 VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING
 
+
 # Try to compile for ARMv8. If the compiler is too old and doesn't support it,
 # fall back to v7. There is no easy way to check for what architecture the code
 # is being compiled, so define a macro specifying that (see arch/arm/Makefile).
@@ -89,6 +92,12 @@ VDSO_CFLAGS += -Wno-int-to-pointer-cast
 VDSO_AFLAGS := $(VDSO_CAFLAGS)
 VDSO_AFLAGS += -D__ASSEMBLY__
 
+# Check for binutils support for dmb ishld
+dmbinstr := $(call cc32-as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1)
+
+VDSO_CFLAGS += $(dmbinstr)
+VDSO_AFLAGS += $(dmbinstr)
+
 VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
 # From arm vDSO Makefile
 VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
-- 
2.23.0


^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
@ 2019-10-03 17:48   ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, luto, tglx,
	vincenzo.frascino, will

Older versions of binutils that do not support certain types of memory
barriers can cause build failure of the vdso32 library.

Add a compilation time mechanism that detects if binutils supports those
instructions and configure the kernel accordingly.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Will Deacon <will@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/include/asm/vdso/compat_barrier.h | 2 +-
 arch/arm64/kernel/vdso32/Makefile            | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h
index fb60a88b5ed4..3fd8fd6d8fc2 100644
--- a/arch/arm64/include/asm/vdso/compat_barrier.h
+++ b/arch/arm64/include/asm/vdso/compat_barrier.h
@@ -20,7 +20,7 @@
 
 #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
 
-#if __LINUX_ARM_ARCH__ >= 8
+#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD)
 #define aarch32_smp_mb()	dmb(ish)
 #define aarch32_smp_rmb()	dmb(ishld)
 #define aarch32_smp_wmb()	dmb(ishst)
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 19e0d3115ffe..77aa61340374 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -15,6 +15,8 @@ cc32-disable-warning = $(call try-run,\
 	$(COMPATCC) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
 cc32-ldoption = $(call try-run,\
         $(COMPATCC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
+cc32-as-instr = $(call try-run,\
+	printf "%b\n" "$(1)" | $(COMPATCC) $(VDSO_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
 
 # We cannot use the global flags to compile the vDSO files, the main reason
 # being that the 32-bit compiler may be older than the main (64-bit) compiler
@@ -53,6 +55,7 @@ endif
 VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector
 VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING
 
+
 # Try to compile for ARMv8. If the compiler is too old and doesn't support it,
 # fall back to v7. There is no easy way to check for what architecture the code
 # is being compiled, so define a macro specifying that (see arch/arm/Makefile).
@@ -89,6 +92,12 @@ VDSO_CFLAGS += -Wno-int-to-pointer-cast
 VDSO_AFLAGS := $(VDSO_CAFLAGS)
 VDSO_AFLAGS += -D__ASSEMBLY__
 
+# Check for binutils support for dmb ishld
+dmbinstr := $(call cc32-as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1)
+
+VDSO_CFLAGS += $(dmbinstr)
+VDSO_AFLAGS += $(dmbinstr)
+
 VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
 # From arm vDSO Makefile
 VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 3/6] arm64: Remove gettimeofday.S
  2019-10-03 17:48 ` Vincenzo Frascino
@ 2019-10-03 17:48   ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: vincenzo.frascino, ard.biesheuvel, ndesaulniers, catalin.marinas,
	will, tglx, luto

gettimeofday.S was originally removed with the introduction of the
support for Unified vDSOs in arm64 and replaced with the C
implementation.

The file seems again present in the repository due to a side effect of
rebase.

Remove the file again.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/vdso/gettimeofday.S | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 delete mode 100644 arch/arm64/kernel/vdso/gettimeofday.S

diff --git a/arch/arm64/kernel/vdso/gettimeofday.S b/arch/arm64/kernel/vdso/gettimeofday.S
deleted file mode 100644
index e69de29bb2d1..000000000000
-- 
2.23.0


^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 3/6] arm64: Remove gettimeofday.S
@ 2019-10-03 17:48   ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, luto, tglx,
	vincenzo.frascino, will

gettimeofday.S was originally removed with the introduction of the
support for Unified vDSOs in arm64 and replaced with the C
implementation.

The file seems again present in the repository due to a side effect of
rebase.

Remove the file again.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/vdso/gettimeofday.S | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 delete mode 100644 arch/arm64/kernel/vdso/gettimeofday.S

diff --git a/arch/arm64/kernel/vdso/gettimeofday.S b/arch/arm64/kernel/vdso/gettimeofday.S
deleted file mode 100644
index e69de29bb2d1..000000000000
-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 4/6] arm64: vdso32: Remove jump label config option in Makefile
  2019-10-03 17:48 ` Vincenzo Frascino
@ 2019-10-03 17:48   ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: vincenzo.frascino, ard.biesheuvel, ndesaulniers, catalin.marinas,
	will, tglx, luto

The jump labels are not used in vdso32 since it is not possible to run
runtime patching on them.

Remove the configuration option from the Makefile.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/vdso32/Makefile | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 77aa61340374..038357a1e835 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -38,9 +38,6 @@ VDSO_CAFLAGS += $(call cc32-option,-fno-PIE)
 ifdef CONFIG_DEBUG_INFO
 VDSO_CAFLAGS += -g
 endif
-ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(COMPATCC)), y)
-VDSO_CAFLAGS += -DCC_HAVE_ASM_GOTO
-endif
 
 # From arm Makefile
 VDSO_CAFLAGS += $(call cc32-option,-fno-dwarf2-cfi-asm)
-- 
2.23.0


^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 4/6] arm64: vdso32: Remove jump label config option in Makefile
@ 2019-10-03 17:48   ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, luto, tglx,
	vincenzo.frascino, will

The jump labels are not used in vdso32 since it is not possible to run
runtime patching on them.

Remove the configuration option from the Makefile.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/vdso32/Makefile | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 77aa61340374..038357a1e835 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -38,9 +38,6 @@ VDSO_CAFLAGS += $(call cc32-option,-fno-PIE)
 ifdef CONFIG_DEBUG_INFO
 VDSO_CAFLAGS += -g
 endif
-ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(COMPATCC)), y)
-VDSO_CAFLAGS += -DCC_HAVE_ASM_GOTO
-endif
 
 # From arm Makefile
 VDSO_CAFLAGS += $(call cc32-option,-fno-dwarf2-cfi-asm)
-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 5/6] arm64: Remove vdso_datapage.h
  2019-10-03 17:48 ` Vincenzo Frascino
@ 2019-10-03 17:48   ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: vincenzo.frascino, ard.biesheuvel, ndesaulniers, catalin.marinas,
	will, tglx, luto

vdso_datapage.h  was originally removed with the introduction of the
support for Unified vDSOs in arm64 and replaced with the C
implementation.

The file seems again present in the repository due to a side effect of
rebase.

Remove the file again.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 arch/arm64/include/asm/vdso_datapage.h | 33 --------------------------
 1 file changed, 33 deletions(-)
 delete mode 100644 arch/arm64/include/asm/vdso_datapage.h

diff --git a/arch/arm64/include/asm/vdso_datapage.h b/arch/arm64/include/asm/vdso_datapage.h
deleted file mode 100644
index 1f38bf330a6e..000000000000
--- a/arch/arm64/include/asm/vdso_datapage.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2012 ARM Limited
- */
-#ifndef __ASM_VDSO_DATAPAGE_H
-#define __ASM_VDSO_DATAPAGE_H
-
-#ifndef __ASSEMBLY__
-
-struct vdso_data {
-	__u64 cs_cycle_last;	/* Timebase at clocksource init */
-	__u64 raw_time_sec;	/* Raw time */
-	__u64 raw_time_nsec;
-	__u64 xtime_clock_sec;	/* Kernel time */
-	__u64 xtime_clock_nsec;
-	__u64 xtime_coarse_sec;	/* Coarse time */
-	__u64 xtime_coarse_nsec;
-	__u64 wtm_clock_sec;	/* Wall to monotonic time */
-	__u64 wtm_clock_nsec;
-	__u32 tb_seq_count;	/* Timebase sequence counter */
-	/* cs_* members must be adjacent and in this order (ldp accesses) */
-	__u32 cs_mono_mult;	/* NTP-adjusted clocksource multiplier */
-	__u32 cs_shift;		/* Clocksource shift (mono = raw) */
-	__u32 cs_raw_mult;	/* Raw clocksource multiplier */
-	__u32 tz_minuteswest;	/* Whacky timezone stuff */
-	__u32 tz_dsttime;
-	__u32 use_syscall;
-	__u32 hrtimer_res;
-};
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* __ASM_VDSO_DATAPAGE_H */
-- 
2.23.0


^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 5/6] arm64: Remove vdso_datapage.h
@ 2019-10-03 17:48   ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, luto, tglx,
	vincenzo.frascino, will

vdso_datapage.h  was originally removed with the introduction of the
support for Unified vDSOs in arm64 and replaced with the C
implementation.

The file seems again present in the repository due to a side effect of
rebase.

Remove the file again.

Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 arch/arm64/include/asm/vdso_datapage.h | 33 --------------------------
 1 file changed, 33 deletions(-)
 delete mode 100644 arch/arm64/include/asm/vdso_datapage.h

diff --git a/arch/arm64/include/asm/vdso_datapage.h b/arch/arm64/include/asm/vdso_datapage.h
deleted file mode 100644
index 1f38bf330a6e..000000000000
--- a/arch/arm64/include/asm/vdso_datapage.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2012 ARM Limited
- */
-#ifndef __ASM_VDSO_DATAPAGE_H
-#define __ASM_VDSO_DATAPAGE_H
-
-#ifndef __ASSEMBLY__
-
-struct vdso_data {
-	__u64 cs_cycle_last;	/* Timebase at clocksource init */
-	__u64 raw_time_sec;	/* Raw time */
-	__u64 raw_time_nsec;
-	__u64 xtime_clock_sec;	/* Kernel time */
-	__u64 xtime_clock_nsec;
-	__u64 xtime_coarse_sec;	/* Coarse time */
-	__u64 xtime_coarse_nsec;
-	__u64 wtm_clock_sec;	/* Wall to monotonic time */
-	__u64 wtm_clock_nsec;
-	__u32 tb_seq_count;	/* Timebase sequence counter */
-	/* cs_* members must be adjacent and in this order (ldp accesses) */
-	__u32 cs_mono_mult;	/* NTP-adjusted clocksource multiplier */
-	__u32 cs_shift;		/* Clocksource shift (mono = raw) */
-	__u32 cs_raw_mult;	/* Raw clocksource multiplier */
-	__u32 tz_minuteswest;	/* Whacky timezone stuff */
-	__u32 tz_dsttime;
-	__u32 use_syscall;
-	__u32 hrtimer_res;
-};
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* __ASM_VDSO_DATAPAGE_H */
-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 6/6] lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO
  2019-10-03 17:48 ` Vincenzo Frascino
@ 2019-10-03 17:48   ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: vincenzo.frascino, ard.biesheuvel, ndesaulniers, catalin.marinas,
	will, tglx, luto

arm64 was the last architecture using CROSS_COMPILE_COMPAT_VDSO config
option. With this patch series the dependency in the architecture has
been removed.

Remove CROSS_COMPILE_COMPAT_VDSO from the Unified vDSO library code.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 lib/vdso/Kconfig | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index cc00364bd2c2..9fe698ff62ec 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -24,13 +24,4 @@ config GENERIC_COMPAT_VDSO
 	help
 	  This config option enables the compat VDSO layer.
 
-config CROSS_COMPILE_COMPAT_VDSO
-	string "32 bit Toolchain prefix for compat vDSO"
-	default ""
-	depends on GENERIC_COMPAT_VDSO
-	help
-	  Defines the cross-compiler prefix for compiling compat vDSO.
-	  If a 64 bit compiler (i.e. x86_64) can compile the VDSO for
-	  32 bit, it does not need to define this parameter.
-
 endif
-- 
2.23.0


^ permalink raw reply	[flat|nested] 36+ messages in thread

* [PATCH v5 6/6] lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO
@ 2019-10-03 17:48   ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-03 17:48 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, luto, tglx,
	vincenzo.frascino, will

arm64 was the last architecture using CROSS_COMPILE_COMPAT_VDSO config
option. With this patch series the dependency in the architecture has
been removed.

Remove CROSS_COMPILE_COMPAT_VDSO from the Unified vDSO library code.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 lib/vdso/Kconfig | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index cc00364bd2c2..9fe698ff62ec 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -24,13 +24,4 @@ config GENERIC_COMPAT_VDSO
 	help
 	  This config option enables the compat VDSO layer.
 
-config CROSS_COMPILE_COMPAT_VDSO
-	string "32 bit Toolchain prefix for compat vDSO"
-	default ""
-	depends on GENERIC_COMPAT_VDSO
-	help
-	  Defines the cross-compiler prefix for compiling compat vDSO.
-	  If a 64 bit compiler (i.e. x86_64) can compile the VDSO for
-	  32 bit, it does not need to define this parameter.
-
 endif
-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
  2019-10-03 17:48   ` Vincenzo Frascino
@ 2019-10-03 20:18     ` Nick Desaulniers
  -1 siblings, 0 replies; 36+ messages in thread
From: Nick Desaulniers @ 2019-10-03 20:18 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: Linux ARM, LKML, Ard Biesheuvel, Catalin Marinas, Will Deacon,
	Thomas Gleixner, Andy Lutomirski

On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
<vincenzo.frascino@arm.com> wrote:
>
> Older versions of binutils that do not support certain types of memory
> barriers can cause build failure of the vdso32 library.

Do you know specific version numbers of binutils that are affected?
May be helpful to have in the commit message just for future
travelers.

>
> Add a compilation time mechanism that detects if binutils supports those
> instructions and configure the kernel accordingly.
>
> Cc: Will Deacon <will@kernel.org>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Reported-by: Will Deacon <will@kernel.org>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
> Tested-by: Catalin Marinas <catalin.marinas@arm.com>
> ---
>  arch/arm64/include/asm/vdso/compat_barrier.h | 2 +-
>  arch/arm64/kernel/vdso32/Makefile            | 9 +++++++++
>  2 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h
> index fb60a88b5ed4..3fd8fd6d8fc2 100644
> --- a/arch/arm64/include/asm/vdso/compat_barrier.h
> +++ b/arch/arm64/include/asm/vdso/compat_barrier.h
> @@ -20,7 +20,7 @@
>
>  #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
>
> -#if __LINUX_ARM_ARCH__ >= 8
> +#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD)
>  #define aarch32_smp_mb()       dmb(ish)
>  #define aarch32_smp_rmb()      dmb(ishld)
>  #define aarch32_smp_wmb()      dmb(ishst)
> diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
> index 19e0d3115ffe..77aa61340374 100644
> --- a/arch/arm64/kernel/vdso32/Makefile
> +++ b/arch/arm64/kernel/vdso32/Makefile
> @@ -15,6 +15,8 @@ cc32-disable-warning = $(call try-run,\
>         $(COMPATCC) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
>  cc32-ldoption = $(call try-run,\
>          $(COMPATCC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
> +cc32-as-instr = $(call try-run,\
> +       printf "%b\n" "$(1)" | $(COMPATCC) $(VDSO_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
>
>  # We cannot use the global flags to compile the vDSO files, the main reason
>  # being that the 32-bit compiler may be older than the main (64-bit) compiler
> @@ -53,6 +55,7 @@ endif
>  VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector
>  VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING
>
> +
>  # Try to compile for ARMv8. If the compiler is too old and doesn't support it,
>  # fall back to v7. There is no easy way to check for what architecture the code
>  # is being compiled, so define a macro specifying that (see arch/arm/Makefile).
> @@ -89,6 +92,12 @@ VDSO_CFLAGS += -Wno-int-to-pointer-cast
>  VDSO_AFLAGS := $(VDSO_CAFLAGS)
>  VDSO_AFLAGS += -D__ASSEMBLY__
>
> +# Check for binutils support for dmb ishld
> +dmbinstr := $(call cc32-as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1)
> +
> +VDSO_CFLAGS += $(dmbinstr)
> +VDSO_AFLAGS += $(dmbinstr)
> +
>  VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
>  # From arm vDSO Makefile
>  VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
> --
> 2.23.0
>


-- 
Thanks,
~Nick Desaulniers

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
@ 2019-10-03 20:18     ` Nick Desaulniers
  0 siblings, 0 replies; 36+ messages in thread
From: Nick Desaulniers @ 2019-10-03 20:18 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: Ard Biesheuvel, Catalin Marinas, LKML, Andy Lutomirski,
	Thomas Gleixner, Will Deacon, Linux ARM

On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
<vincenzo.frascino@arm.com> wrote:
>
> Older versions of binutils that do not support certain types of memory
> barriers can cause build failure of the vdso32 library.

Do you know specific version numbers of binutils that are affected?
May be helpful to have in the commit message just for future
travelers.

>
> Add a compilation time mechanism that detects if binutils supports those
> instructions and configure the kernel accordingly.
>
> Cc: Will Deacon <will@kernel.org>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Reported-by: Will Deacon <will@kernel.org>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
> Tested-by: Catalin Marinas <catalin.marinas@arm.com>
> ---
>  arch/arm64/include/asm/vdso/compat_barrier.h | 2 +-
>  arch/arm64/kernel/vdso32/Makefile            | 9 +++++++++
>  2 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h
> index fb60a88b5ed4..3fd8fd6d8fc2 100644
> --- a/arch/arm64/include/asm/vdso/compat_barrier.h
> +++ b/arch/arm64/include/asm/vdso/compat_barrier.h
> @@ -20,7 +20,7 @@
>
>  #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
>
> -#if __LINUX_ARM_ARCH__ >= 8
> +#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD)
>  #define aarch32_smp_mb()       dmb(ish)
>  #define aarch32_smp_rmb()      dmb(ishld)
>  #define aarch32_smp_wmb()      dmb(ishst)
> diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
> index 19e0d3115ffe..77aa61340374 100644
> --- a/arch/arm64/kernel/vdso32/Makefile
> +++ b/arch/arm64/kernel/vdso32/Makefile
> @@ -15,6 +15,8 @@ cc32-disable-warning = $(call try-run,\
>         $(COMPATCC) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
>  cc32-ldoption = $(call try-run,\
>          $(COMPATCC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
> +cc32-as-instr = $(call try-run,\
> +       printf "%b\n" "$(1)" | $(COMPATCC) $(VDSO_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
>
>  # We cannot use the global flags to compile the vDSO files, the main reason
>  # being that the 32-bit compiler may be older than the main (64-bit) compiler
> @@ -53,6 +55,7 @@ endif
>  VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector
>  VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING
>
> +
>  # Try to compile for ARMv8. If the compiler is too old and doesn't support it,
>  # fall back to v7. There is no easy way to check for what architecture the code
>  # is being compiled, so define a macro specifying that (see arch/arm/Makefile).
> @@ -89,6 +92,12 @@ VDSO_CFLAGS += -Wno-int-to-pointer-cast
>  VDSO_AFLAGS := $(VDSO_CAFLAGS)
>  VDSO_AFLAGS += -D__ASSEMBLY__
>
> +# Check for binutils support for dmb ishld
> +dmbinstr := $(call cc32-as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1)
> +
> +VDSO_CFLAGS += $(dmbinstr)
> +VDSO_AFLAGS += $(dmbinstr)
> +
>  VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
>  # From arm vDSO Makefile
>  VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
> --
> 2.23.0
>


-- 
Thanks,
~Nick Desaulniers

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
  2019-10-03 20:18     ` Nick Desaulniers
@ 2019-10-03 20:49       ` Will Deacon
  -1 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-03 20:49 UTC (permalink / raw)
  To: Nick Desaulniers
  Cc: Vincenzo Frascino, Linux ARM, LKML, Ard Biesheuvel,
	Catalin Marinas, Thomas Gleixner, Andy Lutomirski

On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> <vincenzo.frascino@arm.com> wrote:
> >
> > Older versions of binutils that do not support certain types of memory
> > barriers can cause build failure of the vdso32 library.
> 
> Do you know specific version numbers of binutils that are affected?
> May be helpful to have in the commit message just for future
> travelers.

A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
which seems to correlate with the 2.24 release.

Will

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
@ 2019-10-03 20:49       ` Will Deacon
  0 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-03 20:49 UTC (permalink / raw)
  To: Nick Desaulniers
  Cc: Ard Biesheuvel, Catalin Marinas, LKML, Andy Lutomirski,
	Thomas Gleixner, Vincenzo Frascino, Linux ARM

On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> <vincenzo.frascino@arm.com> wrote:
> >
> > Older versions of binutils that do not support certain types of memory
> > barriers can cause build failure of the vdso32 library.
> 
> Do you know specific version numbers of binutils that are affected?
> May be helpful to have in the commit message just for future
> travelers.

A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
which seems to correlate with the 2.24 release.

Will

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
  2019-10-03 20:49       ` Will Deacon
@ 2019-10-03 20:56         ` Nick Desaulniers
  -1 siblings, 0 replies; 36+ messages in thread
From: Nick Desaulniers @ 2019-10-03 20:56 UTC (permalink / raw)
  To: Will Deacon, Vincenzo Frascino
  Cc: Linux ARM, LKML, Ard Biesheuvel, Catalin Marinas,
	Thomas Gleixner, Andy Lutomirski

On Thu, Oct 3, 2019 at 1:49 PM Will Deacon <will@kernel.org> wrote:
>
> On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> > On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> > <vincenzo.frascino@arm.com> wrote:
> > >
> > > Older versions of binutils that do not support certain types of memory
> > > barriers can cause build failure of the vdso32 library.
> >
> > Do you know specific version numbers of binutils that are affected?
> > May be helpful to have in the commit message just for future
> > travelers.
>
> A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
> which seems to correlate with the 2.24 release.

Cool, thanks for digging.  Vincenzo, can we please add that to the
commit message?
-- 
Thanks,
~Nick Desaulniers

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
@ 2019-10-03 20:56         ` Nick Desaulniers
  0 siblings, 0 replies; 36+ messages in thread
From: Nick Desaulniers @ 2019-10-03 20:56 UTC (permalink / raw)
  To: Will Deacon, Vincenzo Frascino
  Cc: Ard Biesheuvel, Catalin Marinas, LKML, Andy Lutomirski,
	Thomas Gleixner, Linux ARM

On Thu, Oct 3, 2019 at 1:49 PM Will Deacon <will@kernel.org> wrote:
>
> On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> > On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> > <vincenzo.frascino@arm.com> wrote:
> > >
> > > Older versions of binutils that do not support certain types of memory
> > > barriers can cause build failure of the vdso32 library.
> >
> > Do you know specific version numbers of binutils that are affected?
> > May be helpful to have in the commit message just for future
> > travelers.
>
> A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
> which seems to correlate with the 2.24 release.

Cool, thanks for digging.  Vincenzo, can we please add that to the
commit message?
-- 
Thanks,
~Nick Desaulniers

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
  2019-10-03 20:56         ` Nick Desaulniers
@ 2019-10-03 20:59           ` Will Deacon
  -1 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-03 20:59 UTC (permalink / raw)
  To: Nick Desaulniers
  Cc: Vincenzo Frascino, Linux ARM, LKML, Ard Biesheuvel,
	Catalin Marinas, Thomas Gleixner, Andy Lutomirski

On Thu, Oct 03, 2019 at 01:56:39PM -0700, Nick Desaulniers wrote:
> On Thu, Oct 3, 2019 at 1:49 PM Will Deacon <will@kernel.org> wrote:
> >
> > On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> > > On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> > > <vincenzo.frascino@arm.com> wrote:
> > > >
> > > > Older versions of binutils that do not support certain types of memory
> > > > barriers can cause build failure of the vdso32 library.
> > >
> > > Do you know specific version numbers of binutils that are affected?
> > > May be helpful to have in the commit message just for future
> > > travelers.
> >
> > A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
> > which seems to correlate with the 2.24 release.
> 
> Cool, thanks for digging.  Vincenzo, can we please add that to the
> commit message?

If this is the only change, then I can add it when I apply -- no need to
respin just for this! (although I'm also writing this to remind myself :)

Will

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
@ 2019-10-03 20:59           ` Will Deacon
  0 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-03 20:59 UTC (permalink / raw)
  To: Nick Desaulniers
  Cc: Ard Biesheuvel, Catalin Marinas, LKML, Andy Lutomirski,
	Thomas Gleixner, Vincenzo Frascino, Linux ARM

On Thu, Oct 03, 2019 at 01:56:39PM -0700, Nick Desaulniers wrote:
> On Thu, Oct 3, 2019 at 1:49 PM Will Deacon <will@kernel.org> wrote:
> >
> > On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> > > On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> > > <vincenzo.frascino@arm.com> wrote:
> > > >
> > > > Older versions of binutils that do not support certain types of memory
> > > > barriers can cause build failure of the vdso32 library.
> > >
> > > Do you know specific version numbers of binutils that are affected?
> > > May be helpful to have in the commit message just for future
> > > travelers.
> >
> > A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
> > which seems to correlate with the 2.24 release.
> 
> Cool, thanks for digging.  Vincenzo, can we please add that to the
> commit message?

If this is the only change, then I can add it when I apply -- no need to
respin just for this! (although I'm also writing this to remind myself :)

Will

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
  2019-10-03 20:59           ` Will Deacon
@ 2019-10-03 21:50             ` Nick Desaulniers
  -1 siblings, 0 replies; 36+ messages in thread
From: Nick Desaulniers @ 2019-10-03 21:50 UTC (permalink / raw)
  To: Will Deacon
  Cc: Vincenzo Frascino, Linux ARM, LKML, Ard Biesheuvel,
	Catalin Marinas, Thomas Gleixner, Andy Lutomirski

On Thu, Oct 3, 2019 at 1:59 PM Will Deacon <will@kernel.org> wrote:
>
> On Thu, Oct 03, 2019 at 01:56:39PM -0700, Nick Desaulniers wrote:
> > On Thu, Oct 3, 2019 at 1:49 PM Will Deacon <will@kernel.org> wrote:
> > >
> > > On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> > > > On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> > > > <vincenzo.frascino@arm.com> wrote:
> > > > >
> > > > > Older versions of binutils that do not support certain types of memory
> > > > > barriers can cause build failure of the vdso32 library.
> > > >
> > > > Do you know specific version numbers of binutils that are affected?
> > > > May be helpful to have in the commit message just for future
> > > > travelers.
> > >
> > > A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
> > > which seems to correlate with the 2.24 release.
> >
> > Cool, thanks for digging.  Vincenzo, can we please add that to the
> > commit message?
>
> If this is the only change, then I can add it when I apply -- no need to
> respin just for this! (although I'm also writing this to remind myself :)

Yep that's cool with me.  Feel free to add my Acked by tag to the
series as well.  Thanks for pursuing this Vincenzo.
-- 
Thanks,
~Nick Desaulniers

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld
@ 2019-10-03 21:50             ` Nick Desaulniers
  0 siblings, 0 replies; 36+ messages in thread
From: Nick Desaulniers @ 2019-10-03 21:50 UTC (permalink / raw)
  To: Will Deacon
  Cc: Ard Biesheuvel, Catalin Marinas, LKML, Andy Lutomirski,
	Thomas Gleixner, Vincenzo Frascino, Linux ARM

On Thu, Oct 3, 2019 at 1:59 PM Will Deacon <will@kernel.org> wrote:
>
> On Thu, Oct 03, 2019 at 01:56:39PM -0700, Nick Desaulniers wrote:
> > On Thu, Oct 3, 2019 at 1:49 PM Will Deacon <will@kernel.org> wrote:
> > >
> > > On Thu, Oct 03, 2019 at 01:18:16PM -0700, Nick Desaulniers wrote:
> > > > On Thu, Oct 3, 2019 at 10:48 AM Vincenzo Frascino
> > > > <vincenzo.frascino@arm.com> wrote:
> > > > >
> > > > > Older versions of binutils that do not support certain types of memory
> > > > > barriers can cause build failure of the vdso32 library.
> > > >
> > > > Do you know specific version numbers of binutils that are affected?
> > > > May be helpful to have in the commit message just for future
> > > > travelers.
> > >
> > > A quick bit of archaeology suggests e797f7e0b2be added this back in 2012,
> > > which seems to correlate with the 2.24 release.
> >
> > Cool, thanks for digging.  Vincenzo, can we please add that to the
> > commit message?
>
> If this is the only change, then I can add it when I apply -- no need to
> respin just for this! (although I'm also writing this to remind myself :)

Yep that's cool with me.  Feel free to add my Acked by tag to the
series as well.  Thanks for pursuing this Vincenzo.
-- 
Thanks,
~Nick Desaulniers

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
  2019-10-03 17:48 ` Vincenzo Frascino
@ 2019-10-07 13:31   ` Will Deacon
  -1 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-07 13:31 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: linux-arm-kernel, linux-kernel, ard.biesheuvel, ndesaulniers,
	catalin.marinas, tglx, luto

Hi Vincenzo,

On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
> This patch series is meant to address the various compilation issues
> reported recently for arm64 vdso32 [1].
> 
> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.

I've queued this up as fixes for 5.4, but I ended up making quite a few
additional changes to address some other issues and minor inconsistencies
I ran into. In particular, with my changes, you can now easily build the
kernel with clang but the compat vDSO with gcc. The header files still need
sorting out properly, but I think this is a decent starting point:

https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes

Please have a look.

Will

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-07 13:31   ` Will Deacon
  0 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-07 13:31 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, linux-kernel,
	luto, tglx, linux-arm-kernel

Hi Vincenzo,

On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
> This patch series is meant to address the various compilation issues
> reported recently for arm64 vdso32 [1].
> 
> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.

I've queued this up as fixes for 5.4, but I ended up making quite a few
additional changes to address some other issues and minor inconsistencies
I ran into. In particular, with my changes, you can now easily build the
kernel with clang but the compat vDSO with gcc. The header files still need
sorting out properly, but I think this is a decent starting point:

https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes

Please have a look.

Will

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
  2019-10-07 13:31   ` Will Deacon
@ 2019-10-07 13:54     ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-07 13:54 UTC (permalink / raw)
  To: Will Deacon
  Cc: linux-arm-kernel, linux-kernel, ard.biesheuvel, ndesaulniers,
	catalin.marinas, tglx, luto

[-- Attachment #1: Type: text/plain, Size: 1127 bytes --]

Hi Will,

On 07/10/2019 14:31, Will Deacon wrote:
> Hi Vincenzo,
> 
> On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
>> This patch series is meant to address the various compilation issues
>> reported recently for arm64 vdso32 [1].
>>
>> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
>> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
> 
> I've queued this up as fixes for 5.4, but I ended up making quite a few
> additional changes to address some other issues and minor inconsistencies
> I ran into. In particular, with my changes, you can now easily build the
> kernel with clang but the compat vDSO with gcc. The header files still need
> sorting out properly, but I think this is a decent starting point:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
> 
> Please have a look.
> 

Thank you for letting me know, I will have a look.

I see acked-by Catalin on the patches, did you post them in review somewhere? I
could not find them. Sorry

> Will
> 

-- 
Regards,
Vincenzo

[-- Attachment #2: pEpkey.asc --]
[-- Type: application/pgp-keys, Size: 14291 bytes --]

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-07 13:54     ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-07 13:54 UTC (permalink / raw)
  To: Will Deacon
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, linux-kernel,
	luto, tglx, linux-arm-kernel

[-- Attachment #1: Type: text/plain, Size: 1127 bytes --]

Hi Will,

On 07/10/2019 14:31, Will Deacon wrote:
> Hi Vincenzo,
> 
> On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
>> This patch series is meant to address the various compilation issues
>> reported recently for arm64 vdso32 [1].
>>
>> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
>> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
> 
> I've queued this up as fixes for 5.4, but I ended up making quite a few
> additional changes to address some other issues and minor inconsistencies
> I ran into. In particular, with my changes, you can now easily build the
> kernel with clang but the compat vDSO with gcc. The header files still need
> sorting out properly, but I think this is a decent starting point:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
> 
> Please have a look.
> 

Thank you for letting me know, I will have a look.

I see acked-by Catalin on the patches, did you post them in review somewhere? I
could not find them. Sorry

> Will
> 

-- 
Regards,
Vincenzo

[-- Attachment #2: pEpkey.asc --]
[-- Type: application/pgp-keys, Size: 14291 bytes --]

[-- Attachment #3: Type: text/plain, Size: 176 bytes --]

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
  2019-10-07 13:54     ` Vincenzo Frascino
@ 2019-10-07 14:15       ` Will Deacon
  -1 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-07 14:15 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: linux-arm-kernel, linux-kernel, ard.biesheuvel, ndesaulniers,
	catalin.marinas, tglx, luto

On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
> On 07/10/2019 14:31, Will Deacon wrote:
> > On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
> >> This patch series is meant to address the various compilation issues
> >> reported recently for arm64 vdso32 [1].
> >>
> >> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
> >> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
> > 
> > I've queued this up as fixes for 5.4, but I ended up making quite a few
> > additional changes to address some other issues and minor inconsistencies
> > I ran into. In particular, with my changes, you can now easily build the
> > kernel with clang but the compat vDSO with gcc. The header files still need
> > sorting out properly, but I think this is a decent starting point:
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
> > 
> > Please have a look.
> > 
> 
> Thank you for letting me know, I will have a look.

Thanks.

> I see acked-by Catalin on the patches, did you post them in review somewhere? I
> could not find them. Sorry

I pushed them out to a temporary vdso branch on Friday and Catalin looked at
that. If you'd like me to post them as well, please let me know, although
I'm keen to get this stuff sorted out by -rc3 without disabling the compat
vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
top of yours then let's go for that, otherwise let's punt this to 5.5 and
try to fix the header mess at the same time.

Will

[1] https://lkml.kernel.org/r/20190925130926.50674-1-catalin.marinas@arm.com

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-07 14:15       ` Will Deacon
  0 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-07 14:15 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, linux-kernel,
	luto, tglx, linux-arm-kernel

On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
> On 07/10/2019 14:31, Will Deacon wrote:
> > On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
> >> This patch series is meant to address the various compilation issues
> >> reported recently for arm64 vdso32 [1].
> >>
> >> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
> >> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
> > 
> > I've queued this up as fixes for 5.4, but I ended up making quite a few
> > additional changes to address some other issues and minor inconsistencies
> > I ran into. In particular, with my changes, you can now easily build the
> > kernel with clang but the compat vDSO with gcc. The header files still need
> > sorting out properly, but I think this is a decent starting point:
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
> > 
> > Please have a look.
> > 
> 
> Thank you for letting me know, I will have a look.

Thanks.

> I see acked-by Catalin on the patches, did you post them in review somewhere? I
> could not find them. Sorry

I pushed them out to a temporary vdso branch on Friday and Catalin looked at
that. If you'd like me to post them as well, please let me know, although
I'm keen to get this stuff sorted out by -rc3 without disabling the compat
vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
top of yours then let's go for that, otherwise let's punt this to 5.5 and
try to fix the header mess at the same time.

Will

[1] https://lkml.kernel.org/r/20190925130926.50674-1-catalin.marinas@arm.com

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
  2019-10-07 14:15       ` Will Deacon
@ 2019-10-07 14:37         ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-07 14:37 UTC (permalink / raw)
  To: Will Deacon
  Cc: linux-arm-kernel, linux-kernel, ard.biesheuvel, ndesaulniers,
	catalin.marinas, tglx, luto

[-- Attachment #1: Type: text/plain, Size: 2114 bytes --]

On 07/10/2019 15:15, Will Deacon wrote:
> On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
>> On 07/10/2019 14:31, Will Deacon wrote:
>>> On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
>>>> This patch series is meant to address the various compilation issues
>>>> reported recently for arm64 vdso32 [1].
>>>>
>>>> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
>>>> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
>>>
>>> I've queued this up as fixes for 5.4, but I ended up making quite a few
>>> additional changes to address some other issues and minor inconsistencies
>>> I ran into. In particular, with my changes, you can now easily build the
>>> kernel with clang but the compat vDSO with gcc. The header files still need
>>> sorting out properly, but I think this is a decent starting point:
>>>
>>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
>>>
>>> Please have a look.
>>>
>>
>> Thank you for letting me know, I will have a look.
> 
> Thanks.
> 
>> I see acked-by Catalin on the patches, did you post them in review somewhere? I
>> could not find them. Sorry
> 
> I pushed them out to a temporary vdso branch on Friday and Catalin looked at
> that. If you'd like me to post them as well, please let me know, although
> I'm keen to get this stuff sorted out by -rc3 without disabling the compat
> vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
> top of yours then let's go for that, otherwise let's punt this to 5.5 and
> try to fix the header mess at the same time.
> 

No need to repost them. I just got confused by the fact that they got acked and
I could not find them anywhere, hence my question.

I am keen to sort this thing as well, my personal preference is to not disable
compat vdso in 5.4.

I will download your tree, have a look at it and let you know my thoughts.

> Will
> 
> [1] https://lkml.kernel.org/r/20190925130926.50674-1-catalin.marinas@arm.com
> 

-- 
Regards,
Vincenzo

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^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-07 14:37         ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-07 14:37 UTC (permalink / raw)
  To: Will Deacon
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, linux-kernel,
	luto, tglx, linux-arm-kernel

[-- Attachment #1: Type: text/plain, Size: 2114 bytes --]

On 07/10/2019 15:15, Will Deacon wrote:
> On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
>> On 07/10/2019 14:31, Will Deacon wrote:
>>> On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
>>>> This patch series is meant to address the various compilation issues
>>>> reported recently for arm64 vdso32 [1].
>>>>
>>>> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
>>>> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
>>>
>>> I've queued this up as fixes for 5.4, but I ended up making quite a few
>>> additional changes to address some other issues and minor inconsistencies
>>> I ran into. In particular, with my changes, you can now easily build the
>>> kernel with clang but the compat vDSO with gcc. The header files still need
>>> sorting out properly, but I think this is a decent starting point:
>>>
>>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
>>>
>>> Please have a look.
>>>
>>
>> Thank you for letting me know, I will have a look.
> 
> Thanks.
> 
>> I see acked-by Catalin on the patches, did you post them in review somewhere? I
>> could not find them. Sorry
> 
> I pushed them out to a temporary vdso branch on Friday and Catalin looked at
> that. If you'd like me to post them as well, please let me know, although
> I'm keen to get this stuff sorted out by -rc3 without disabling the compat
> vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
> top of yours then let's go for that, otherwise let's punt this to 5.5 and
> try to fix the header mess at the same time.
> 

No need to repost them. I just got confused by the fact that they got acked and
I could not find them anywhere, hence my question.

I am keen to sort this thing as well, my personal preference is to not disable
compat vdso in 5.4.

I will download your tree, have a look at it and let you know my thoughts.

> Will
> 
> [1] https://lkml.kernel.org/r/20190925130926.50674-1-catalin.marinas@arm.com
> 

-- 
Regards,
Vincenzo

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_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
  2019-10-07 14:37         ` Vincenzo Frascino
@ 2019-10-07 17:48           ` Vincenzo Frascino
  -1 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-07 17:48 UTC (permalink / raw)
  To: Will Deacon
  Cc: linux-arm-kernel, linux-kernel, ard.biesheuvel, ndesaulniers,
	catalin.marinas, tglx, luto

[-- Attachment #1: Type: text/plain, Size: 2878 bytes --]

Hi Will,

On 07/10/2019 15:37, Vincenzo Frascino wrote:
> On 07/10/2019 15:15, Will Deacon wrote:
>> On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
>>> On 07/10/2019 14:31, Will Deacon wrote:
>>>> On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
>>>>> This patch series is meant to address the various compilation issues
>>>>> reported recently for arm64 vdso32 [1].
>>>>>
>>>>> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
>>>>> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
>>>>
>>>> I've queued this up as fixes for 5.4, but I ended up making quite a few
>>>> additional changes to address some other issues and minor inconsistencies
>>>> I ran into. In particular, with my changes, you can now easily build the
>>>> kernel with clang but the compat vDSO with gcc. The header files still need
>>>> sorting out properly, but I think this is a decent starting point:
>>>>
>>>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
>>>>
>>>> Please have a look.
>>>>
>>>
>>> Thank you for letting me know, I will have a look.
>>
>> Thanks.
>>
>>> I see acked-by Catalin on the patches, did you post them in review somewhere? I
>>> could not find them. Sorry
>>
>> I pushed them out to a temporary vdso branch on Friday and Catalin looked at
>> that. If you'd like me to post them as well, please let me know, although
>> I'm keen to get this stuff sorted out by -rc3 without disabling the compat
>> vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
>> top of yours then let's go for that, otherwise let's punt this to 5.5 and
>> try to fix the header mess at the same time.
>>
> 
> No need to repost them. I just got confused by the fact that they got acked and
> I could not find them anywhere, hence my question.
> 
> I am keen to sort this thing as well, my personal preference is to not disable
> compat vdso in 5.4.
> 
> I will download your tree, have a look at it and let you know my thoughts.
> 

I tested your patches and they look fine to me. I have just one request, in the
commit message of patch were you rename COMPATCC to CC_COMPAT could you please
add the make command with the update variable?

   $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \
        CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- CC=clang \
        CC_COMPAT=arm-linux-gnueabihf-gcc

It took me a while to understand that the command in the commit message
(c71e88c43796 "arm64: vdso32: Don't use KBUILD_CPPFLAGS unconditionally") was
not working because of the renaming.

Thanks!

If it is not too late you can add my reviewed-by and tested-by ;)

>> Will
>>
>> [1] https://lkml.kernel.org/r/20190925130926.50674-1-catalin.marinas@arm.com
>>
> 

-- 
Regards,
Vincenzo

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^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-07 17:48           ` Vincenzo Frascino
  0 siblings, 0 replies; 36+ messages in thread
From: Vincenzo Frascino @ 2019-10-07 17:48 UTC (permalink / raw)
  To: Will Deacon
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, linux-kernel,
	luto, tglx, linux-arm-kernel

[-- Attachment #1: Type: text/plain, Size: 2878 bytes --]

Hi Will,

On 07/10/2019 15:37, Vincenzo Frascino wrote:
> On 07/10/2019 15:15, Will Deacon wrote:
>> On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
>>> On 07/10/2019 14:31, Will Deacon wrote:
>>>> On Thu, Oct 03, 2019 at 06:48:32PM +0100, Vincenzo Frascino wrote:
>>>>> This patch series is meant to address the various compilation issues
>>>>> reported recently for arm64 vdso32 [1].
>>>>>
>>>>> From v4, the series contains a cleanup of lib/vdso Kconfig as well since
>>>>> CROSS_COMPILE_COMPAT_VDSO is not required anymore by any architecture.
>>>>
>>>> I've queued this up as fixes for 5.4, but I ended up making quite a few
>>>> additional changes to address some other issues and minor inconsistencies
>>>> I ran into. In particular, with my changes, you can now easily build the
>>>> kernel with clang but the compat vDSO with gcc. The header files still need
>>>> sorting out properly, but I think this is a decent starting point:
>>>>
>>>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
>>>>
>>>> Please have a look.
>>>>
>>>
>>> Thank you for letting me know, I will have a look.
>>
>> Thanks.
>>
>>> I see acked-by Catalin on the patches, did you post them in review somewhere? I
>>> could not find them. Sorry
>>
>> I pushed them out to a temporary vdso branch on Friday and Catalin looked at
>> that. If you'd like me to post them as well, please let me know, although
>> I'm keen to get this stuff sorted out by -rc3 without disabling the compat
>> vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
>> top of yours then let's go for that, otherwise let's punt this to 5.5 and
>> try to fix the header mess at the same time.
>>
> 
> No need to repost them. I just got confused by the fact that they got acked and
> I could not find them anywhere, hence my question.
> 
> I am keen to sort this thing as well, my personal preference is to not disable
> compat vdso in 5.4.
> 
> I will download your tree, have a look at it and let you know my thoughts.
> 

I tested your patches and they look fine to me. I have just one request, in the
commit message of patch were you rename COMPATCC to CC_COMPAT could you please
add the make command with the update variable?

   $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \
        CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- CC=clang \
        CC_COMPAT=arm-linux-gnueabihf-gcc

It took me a while to understand that the command in the commit message
(c71e88c43796 "arm64: vdso32: Don't use KBUILD_CPPFLAGS unconditionally") was
not working because of the renaming.

Thanks!

If it is not too late you can add my reviewed-by and tested-by ;)

>> Will
>>
>> [1] https://lkml.kernel.org/r/20190925130926.50674-1-catalin.marinas@arm.com
>>
> 

-- 
Regards,
Vincenzo

[-- Attachment #2: pEpkey.asc --]
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[-- Attachment #3: Type: text/plain, Size: 176 bytes --]

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
  2019-10-07 17:48           ` Vincenzo Frascino
@ 2019-10-08  9:07             ` Will Deacon
  -1 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-08  9:07 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: linux-arm-kernel, linux-kernel, ard.biesheuvel, ndesaulniers,
	catalin.marinas, tglx, luto

On Mon, Oct 07, 2019 at 06:48:00PM +0100, Vincenzo Frascino wrote:
> On 07/10/2019 15:37, Vincenzo Frascino wrote:
> > On 07/10/2019 15:15, Will Deacon wrote:
> >> On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
> >>> On 07/10/2019 14:31, Will Deacon wrote:
> >>>> I've queued this up as fixes for 5.4, but I ended up making quite a few
> >>>> additional changes to address some other issues and minor inconsistencies
> >>>> I ran into. In particular, with my changes, you can now easily build the
> >>>> kernel with clang but the compat vDSO with gcc. The header files still need
> >>>> sorting out properly, but I think this is a decent starting point:
> >>>>
> >>>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
> >>>>
> >>>> Please have a look.
> >>>>
> >>>
> >>> Thank you for letting me know, I will have a look.
> >>
> >> Thanks.
> >>
> >>> I see acked-by Catalin on the patches, did you post them in review somewhere? I
> >>> could not find them. Sorry
> >>
> >> I pushed them out to a temporary vdso branch on Friday and Catalin looked at
> >> that. If you'd like me to post them as well, please let me know, although
> >> I'm keen to get this stuff sorted out by -rc3 without disabling the compat
> >> vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
> >> top of yours then let's go for that, otherwise let's punt this to 5.5 and
> >> try to fix the header mess at the same time.
> >>
> > 
> > No need to repost them. I just got confused by the fact that they got acked and
> > I could not find them anywhere, hence my question.
> > 
> > I am keen to sort this thing as well, my personal preference is to not disable
> > compat vdso in 5.4.
> > 
> > I will download your tree, have a look at it and let you know my thoughts.
> > 
> 
> I tested your patches and they look fine to me. I have just one request, in the
> commit message of patch were you rename COMPATCC to CC_COMPAT could you please
> add the make command with the update variable?
> 
>    $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \
>         CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- CC=clang \
>         CC_COMPAT=arm-linux-gnueabihf-gcc
> 
> It took me a while to understand that the command in the commit message
> (c71e88c43796 "arm64: vdso32: Don't use KBUILD_CPPFLAGS unconditionally") was
> not working because of the renaming.
> 
> Thanks!
> 
> If it is not too late you can add my reviewed-by and tested-by ;)

Thanks, Vincenzo. I'd prefer not to rebase that branch, but I'll mention
your tags in the pull request so they may end up in the merge commit.

Will

^ permalink raw reply	[flat|nested] 36+ messages in thread

* Re: [PATCH v5 0/6] arm64: vdso32: Address various issues
@ 2019-10-08  9:07             ` Will Deacon
  0 siblings, 0 replies; 36+ messages in thread
From: Will Deacon @ 2019-10-08  9:07 UTC (permalink / raw)
  To: Vincenzo Frascino
  Cc: ard.biesheuvel, catalin.marinas, ndesaulniers, linux-kernel,
	luto, tglx, linux-arm-kernel

On Mon, Oct 07, 2019 at 06:48:00PM +0100, Vincenzo Frascino wrote:
> On 07/10/2019 15:37, Vincenzo Frascino wrote:
> > On 07/10/2019 15:15, Will Deacon wrote:
> >> On Mon, Oct 07, 2019 at 02:54:29PM +0100, Vincenzo Frascino wrote:
> >>> On 07/10/2019 14:31, Will Deacon wrote:
> >>>> I've queued this up as fixes for 5.4, but I ended up making quite a few
> >>>> additional changes to address some other issues and minor inconsistencies
> >>>> I ran into. In particular, with my changes, you can now easily build the
> >>>> kernel with clang but the compat vDSO with gcc. The header files still need
> >>>> sorting out properly, but I think this is a decent starting point:
> >>>>
> >>>> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
> >>>>
> >>>> Please have a look.
> >>>>
> >>>
> >>> Thank you for letting me know, I will have a look.
> >>
> >> Thanks.
> >>
> >>> I see acked-by Catalin on the patches, did you post them in review somewhere? I
> >>> could not find them. Sorry
> >>
> >> I pushed them out to a temporary vdso branch on Friday and Catalin looked at
> >> that. If you'd like me to post them as well, please let me know, although
> >> I'm keen to get this stuff sorted out by -rc3 without disabling the compat
> >> vDSO altogether (i.e. [1]). In other words, if you're ok with my changes on
> >> top of yours then let's go for that, otherwise let's punt this to 5.5 and
> >> try to fix the header mess at the same time.
> >>
> > 
> > No need to repost them. I just got confused by the fact that they got acked and
> > I could not find them anywhere, hence my question.
> > 
> > I am keen to sort this thing as well, my personal preference is to not disable
> > compat vdso in 5.4.
> > 
> > I will download your tree, have a look at it and let you know my thoughts.
> > 
> 
> I tested your patches and they look fine to me. I have just one request, in the
> commit message of patch were you rename COMPATCC to CC_COMPAT could you please
> add the make command with the update variable?
> 
>    $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \
>         CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- CC=clang \
>         CC_COMPAT=arm-linux-gnueabihf-gcc
> 
> It took me a while to understand that the command in the commit message
> (c71e88c43796 "arm64: vdso32: Don't use KBUILD_CPPFLAGS unconditionally") was
> not working because of the renaming.
> 
> Thanks!
> 
> If it is not too late you can add my reviewed-by and tested-by ;)

Thanks, Vincenzo. I'd prefer not to rebase that branch, but I'll mention
your tags in the pull request so they may end up in the merge commit.

Will

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 36+ messages in thread

end of thread, other threads:[~2019-10-08  9:07 UTC | newest]

Thread overview: 36+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-03 17:48 [PATCH v5 0/6] arm64: vdso32: Address various issues Vincenzo Frascino
2019-10-03 17:48 ` Vincenzo Frascino
2019-10-03 17:48 ` [PATCH v5 1/6] arm64: vdso32: Fix syncconfig errors Vincenzo Frascino
2019-10-03 17:48   ` Vincenzo Frascino
2019-10-03 17:48 ` [PATCH v5 2/6] arm64: vdso32: Detect binutils support for dmb ishld Vincenzo Frascino
2019-10-03 17:48   ` Vincenzo Frascino
2019-10-03 20:18   ` Nick Desaulniers
2019-10-03 20:18     ` Nick Desaulniers
2019-10-03 20:49     ` Will Deacon
2019-10-03 20:49       ` Will Deacon
2019-10-03 20:56       ` Nick Desaulniers
2019-10-03 20:56         ` Nick Desaulniers
2019-10-03 20:59         ` Will Deacon
2019-10-03 20:59           ` Will Deacon
2019-10-03 21:50           ` Nick Desaulniers
2019-10-03 21:50             ` Nick Desaulniers
2019-10-03 17:48 ` [PATCH v5 3/6] arm64: Remove gettimeofday.S Vincenzo Frascino
2019-10-03 17:48   ` Vincenzo Frascino
2019-10-03 17:48 ` [PATCH v5 4/6] arm64: vdso32: Remove jump label config option in Makefile Vincenzo Frascino
2019-10-03 17:48   ` Vincenzo Frascino
2019-10-03 17:48 ` [PATCH v5 5/6] arm64: Remove vdso_datapage.h Vincenzo Frascino
2019-10-03 17:48   ` Vincenzo Frascino
2019-10-03 17:48 ` [PATCH v5 6/6] lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO Vincenzo Frascino
2019-10-03 17:48   ` Vincenzo Frascino
2019-10-07 13:31 ` [PATCH v5 0/6] arm64: vdso32: Address various issues Will Deacon
2019-10-07 13:31   ` Will Deacon
2019-10-07 13:54   ` Vincenzo Frascino
2019-10-07 13:54     ` Vincenzo Frascino
2019-10-07 14:15     ` Will Deacon
2019-10-07 14:15       ` Will Deacon
2019-10-07 14:37       ` Vincenzo Frascino
2019-10-07 14:37         ` Vincenzo Frascino
2019-10-07 17:48         ` Vincenzo Frascino
2019-10-07 17:48           ` Vincenzo Frascino
2019-10-08  9:07           ` Will Deacon
2019-10-08  9:07             ` Will Deacon

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