[PATCH 00/16] remove eight obsolete architectures

[PATCH 00/16] remove eight obsolete architectures

[Arnd Bergmann]

Here is the collection of patches I have applied to my 'asm-generic' tree
on top of the 'metag' removal. This does not include any of the device
drivers, I'll send those separately to a someone different list of people.

The removal came out of a discussion that is now documented at
https://lwn.net/Articles/748074/

Following up from the state described there, I ended up removing the
mn10300, tile, blackfin and cris architectures directly, rather than
waiting, after consulting with the respective maintainers.

However, the unicore32 architecture is no longer part of the removal,
after its maintainer Xuetao Guan said that the port is still actively
being used and that he intends to keep working on it, and that he will
try to provide updated toolchain sources.

In the end, it seems that while the eight architectures are extremely
different, they all suffered the same fate: There was one company in
charge of an SoC line, a CPU microarchitecture and a software ecosystem,
which was more costly than licensing newer off-the-shelf CPU cores from
a third party (typically ARM, MIPS, or RISC-V). It seems that all the
SoC product lines are still around, but have not used the custom CPU
architectures for several years at this point.

      Arnd

Arnd Bergmann (14):
  arch: remove frv port
  arch: remove m32r port
  arch: remove score port
  arch: remove blackfin port
  arch: remove tile port
  procfs: remove CONFIG_HARDWALL dependency
  mm: remove blackfin MPU support
  mm: remove obsolete alloc_remap()
  treewide: simplify Kconfig dependencies for removed archs
  asm-generic: siginfo: remove obsolete #ifdefs
  Documentation: arch-support: remove obsolete architectures
  asm-generic: clean up asm/unistd.h
  recordmcount.pl: drop blackin and tile support
  ktest: remove obsolete architectures

David Howells (1):
  mn10300: Remove the architecture

Jesper Nilsson (1):
  CRIS: Drop support for the CRIS port

Dirstat only (full diffstat is over 100KB):

   6.3% arch/blackfin/mach-bf548/include/mach/
   4.5% arch/blackfin/mach-bf609/include/mach/
  26.3% arch/blackfin/
   4.1% arch/cris/arch-v32/
   5.6% arch/cris/include/arch-v32/arch/hwregs/iop/
   4.1% arch/cris/include/arch-v32/mach-a3/mach/hwregs/
   4.7% arch/cris/include/arch-v32/
   7.8% arch/cris/
   5.6% arch/frv/
   5.5% arch/m32r/
   7.0% arch/mn10300/
   7.6% arch/tile/include/
   6.4% arch/tile/kernel/
   0.0% Documentation/admin-guide/
   0.0% Documentation/blackfin/
   0.0% Documentation/cris/
   0.0% Documentation/devicetree/bindings/cris/
   0.0% Documentation/devicetree/bindings/interrupt-controller/
   2.8% Documentation/features/
   0.5% Documentation/frv/
   0.0% Documentation/ioctl/
   0.0% Documentation/mn10300/
   0.0% Documentation/
   0.0% block/
   0.0% crypto/
   0.0% drivers/ide/
   0.0% drivers/input/joystick/
   0.0% drivers/isdn/hisax/
   0.0% drivers/net/ethernet/davicom/
   0.0% drivers/net/ethernet/smsc/
   0.0% drivers/net/wireless/cisco/
   0.0% drivers/pci/
   0.0% drivers/pwm/
   0.0% drivers/rtc/
   0.0% drivers/spi/
   0.0% drivers/staging/speakup/
   0.0% drivers/usb/musb/
   0.0% drivers/video/console/
   0.0% drivers/watchdog/
   0.0% fs/minix/
   0.0% fs/proc/
   0.0% fs/
   0.0% include/asm-generic/
   0.0% include/linux/
   0.0% include/uapi/asm-generic/
   0.0% init/
   0.0% kernel/
   0.0% lib/
   0.0% mm/
   0.0% samples/blackfin/
   0.0% samples/kprobes/
   0.0% samples/
   0.0% scripts/mod/
   0.0% scripts/
   0.0% tools/arch/frv/include/uapi/asm/
   0.0% tools/arch/m32r/include/uapi/asm/
   0.0% tools/arch/mn10300/include/uapi/asm/
   0.0% tools/arch/score/include/uapi/asm/
   0.0% tools/arch/tile/include/asm/
   0.0% tools/arch/tile/include/uapi/asm/
   0.0% tools/include/asm-generic/
   0.0% tools/scripts/
   0.0% tools/testing/ktest/examples/
   0.0% tools/testing/ktest/

Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-block@vger.kernel.org
Cc: linux-ide@vger.kernel.org
Cc: linux-input@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: linux-pwm@vger.kernel.org
Cc: linux-rtc@vger.kernel.org
Cc: linux-spi@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-fbdev@vger.kernel.org
Cc: linux-watchdog@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mm@kvack.org

[PATCH 11/16] treewide: simplify Kconfig dependencies for removed archs

[Arnd Bergmann]

A lot of Kconfig symbols have architecture specific dependencies.
In those cases that depend on architectures we have already removed,
they can be omitted.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 block/bounce.c                       |  2 +-
 drivers/ide/Kconfig                  |  2 +-
 drivers/ide/ide-generic.c            | 12 +-----------
 drivers/input/joystick/analog.c      |  2 +-
 drivers/isdn/hisax/Kconfig           | 10 +++++-----
 drivers/net/ethernet/davicom/Kconfig |  2 +-
 drivers/net/ethernet/smsc/Kconfig    |  6 +++---
 drivers/net/wireless/cisco/Kconfig   |  2 +-
 drivers/pwm/Kconfig                  |  2 +-
 drivers/rtc/Kconfig                  |  2 +-
 drivers/spi/Kconfig                  |  4 ++--
 drivers/usb/musb/Kconfig             |  2 +-
 drivers/video/console/Kconfig        |  3 +--
 drivers/watchdog/Kconfig             |  6 ------
 drivers/watchdog/Makefile            |  6 ------
 fs/Kconfig.binfmt                    |  5 ++---
 fs/minix/Kconfig                     |  2 +-
 include/linux/ide.h                  |  7 +------
 init/Kconfig                         |  5 ++---
 lib/Kconfig.debug                    | 13 +++++--------
 lib/test_user_copy.c                 |  2 --
 mm/Kconfig                           |  7 -------
 mm/percpu.c                          |  4 ----
 23 files changed, 31 insertions(+), 77 deletions(-)

diff --git a/block/bounce.c b/block/bounce.c
index 6a3e68292273..dd0b93f2a871 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -31,7 +31,7 @@
 static struct bio_set *bounce_bio_set, *bounce_bio_split;
 static mempool_t *page_pool, *isa_page_pool;
 
-#if defined(CONFIG_HIGHMEM) || defined(CONFIG_NEED_BOUNCE_POOL)
+#if defined(CONFIG_HIGHMEM)
 static __init int init_emergency_pool(void)
 {
 #if defined(CONFIG_HIGHMEM) && !defined(CONFIG_MEMORY_HOTPLUG)
diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index cf1fb3fb5d26..901b8833847f 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -200,7 +200,7 @@ comment "IDE chipset support/bugfixes"
 
 config IDE_GENERIC
 	tristate "generic/default IDE chipset support"
-	depends on ALPHA || X86 || IA64 || M32R || MIPS || ARCH_RPC
+	depends on ALPHA || X86 || IA64 || MIPS || ARCH_RPC
 	default ARM && ARCH_RPC
 	help
 	  This is the generic IDE driver.  This driver attaches to the
diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index 54d7c4685d23..80c0d69b83ac 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -13,13 +13,10 @@
 #include <linux/ide.h>
 #include <linux/pci_ids.h>
 
-/* FIXME: convert arm and m32r to use ide_platform host driver */
+/* FIXME: convert arm to use ide_platform host driver */
 #ifdef CONFIG_ARM
 #include <asm/irq.h>
 #endif
-#ifdef CONFIG_M32R
-#include <asm/m32r.h>
-#endif
 
 #define DRV_NAME	"ide_generic"
 
@@ -35,13 +32,6 @@ static const struct ide_port_info ide_generic_port_info = {
 #ifdef CONFIG_ARM
 static const u16 legacy_bases[] = { 0x1f0 };
 static const int legacy_irqs[]  = { IRQ_HARDDISK };
-#elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
-      defined(CONFIG_PLAT_OPSPUT)
-static const u16 legacy_bases[] = { 0x1f0 };
-static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
-#elif defined(CONFIG_PLAT_MAPPI3)
-static const u16 legacy_bases[] = { 0x1f0, 0x170 };
-static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
 #elif defined(CONFIG_ALPHA)
 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
 static const int legacy_irqs[]  = { 14, 15, 11, 10 };
diff --git a/drivers/input/joystick/analog.c b/drivers/input/joystick/analog.c
index be1b4921f22a..eefac7978f93 100644
--- a/drivers/input/joystick/analog.c
+++ b/drivers/input/joystick/analog.c
@@ -163,7 +163,7 @@ static unsigned int get_time_pit(void)
 #define GET_TIME(x)	do { x = (unsigned int)rdtsc(); } while (0)
 #define DELTA(x,y)	((y)-(x))
 #define TIME_NAME	"TSC"
-#elif defined(__alpha__) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_RISCV) || defined(CONFIG_TILE)
+#elif defined(__alpha__) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
 #define GET_TIME(x)	do { x = get_cycles(); } while (0)
 #define DELTA(x,y)	((y)-(x))
 #define TIME_NAME	"get_cycles"
diff --git a/drivers/isdn/hisax/Kconfig b/drivers/isdn/hisax/Kconfig
index eb83d94ab4fe..38cfc8baae19 100644
--- a/drivers/isdn/hisax/Kconfig
+++ b/drivers/isdn/hisax/Kconfig
@@ -109,7 +109,7 @@ config HISAX_16_3
 
 config HISAX_TELESPCI
 	bool "Teles PCI"
-	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN)))
+	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN)))
 	help
 	  This enables HiSax support for the Teles PCI.
 	  See <file:Documentation/isdn/README.HiSax> on how to configure it.
@@ -237,7 +237,7 @@ config HISAX_MIC
 
 config HISAX_NETJET
 	bool "NETjet card"
-	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
+	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
 	depends on VIRT_TO_BUS
 	help
 	  This enables HiSax support for the NetJet from Traverse
@@ -249,7 +249,7 @@ config HISAX_NETJET
 
 config HISAX_NETJET_U
 	bool "NETspider U card"
-	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
+	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
 	depends on VIRT_TO_BUS
 	help
 	  This enables HiSax support for the Netspider U interface ISDN card
@@ -318,7 +318,7 @@ config HISAX_GAZEL
 
 config HISAX_HFC_PCI
 	bool "HFC PCI-Bus cards"
-	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN)))
+	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN)))
 	help
 	  This enables HiSax support for the HFC-S PCI 2BDS0 based cards.
 
@@ -343,7 +343,7 @@ config HISAX_HFC_SX
 
 config HISAX_ENTERNOW_PCI
 	bool "Formula-n enter:now PCI card"
-	depends on HISAX_NETJET && PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN)))
+	depends on HISAX_NETJET && PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN)))
 	help
 	  This enables HiSax support for the Formula-n enter:now PCI
 	  ISDN card.
diff --git a/drivers/net/ethernet/davicom/Kconfig b/drivers/net/ethernet/davicom/Kconfig
index 7ec2d74f94d3..680a6d983f37 100644
--- a/drivers/net/ethernet/davicom/Kconfig
+++ b/drivers/net/ethernet/davicom/Kconfig
@@ -4,7 +4,7 @@
 
 config DM9000
 	tristate "DM9000 support"
-	depends on ARM || BLACKFIN || MIPS || COLDFIRE || NIOS2
+	depends on ARM || MIPS || COLDFIRE || NIOS2
 	select CRC32
 	select MII
 	---help---
diff --git a/drivers/net/ethernet/smsc/Kconfig b/drivers/net/ethernet/smsc/Kconfig
index 948603e9b905..3da0c573d2ab 100644
--- a/drivers/net/ethernet/smsc/Kconfig
+++ b/drivers/net/ethernet/smsc/Kconfig
@@ -5,8 +5,8 @@
 config NET_VENDOR_SMSC
 	bool "SMC (SMSC)/Western Digital devices"
 	default y
-	depends on ARM || ARM64 || ATARI_ETHERNAT || BLACKFIN || COLDFIRE || \
-		   ISA || M32R || MAC || MIPS || NIOS2 || PCI || \
+	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
+		   ISA || MAC || MIPS || NIOS2 || PCI || \
 		   PCMCIA || SUPERH || XTENSA || H8300
 	---help---
 	  If you have a network (Ethernet) card belonging to this class, say Y.
@@ -37,7 +37,7 @@ config SMC91X
 	select CRC32
 	select MII
 	depends on !OF || GPIOLIB
-	depends on ARM || ARM64 || ATARI_ETHERNAT || BLACKFIN || COLDFIRE || \
+	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
 		   M32R || MIPS || NIOS2 || SUPERH || XTENSA || H8300
 	---help---
 	  This is a driver for SMC's 91x series of Ethernet chipsets,
diff --git a/drivers/net/wireless/cisco/Kconfig b/drivers/net/wireless/cisco/Kconfig
index b22567dff893..8ed0b154bb33 100644
--- a/drivers/net/wireless/cisco/Kconfig
+++ b/drivers/net/wireless/cisco/Kconfig
@@ -33,7 +33,7 @@ config AIRO
 
 config AIRO_CS
 	tristate "Cisco/Aironet 34X/35X/4500/4800 PCMCIA cards"
-	depends on CFG80211 && PCMCIA && (BROKEN || !M32R)
+	depends on CFG80211 && PCMCIA
 	select WIRELESS_EXT
 	select WEXT_SPY
 	select WEXT_PRIV
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 763ee50ea57d..f16aad3bf5d6 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -43,7 +43,7 @@ config PWM_AB8500
 
 config PWM_ATMEL
 	tristate "Atmel PWM support"
-	depends on ARCH_AT91 || AVR32
+	depends on ARCH_AT91
 	help
 	  Generic PWM framework driver for Atmel SoC.
 
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index be5a3dc99c11..46af10ac45fc 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -868,7 +868,7 @@ comment "Platform RTC drivers"
 
 config RTC_DRV_CMOS
 	tristate "PC-style 'CMOS'"
-	depends on X86 || ARM || M32R || PPC || MIPS || SPARC64
+	depends on X86 || ARM || PPC || MIPS || SPARC64
 	default y if X86
 	select RTC_MC146818_LIB
 	help
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 603783976b81..103c13fcefa0 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -72,10 +72,10 @@ config SPI_ARMADA_3700
 config SPI_ATMEL
 	tristate "Atmel SPI Controller"
 	depends on HAS_DMA
-	depends on (ARCH_AT91 || AVR32 || COMPILE_TEST)
+	depends on ARCH_AT91 || COMPILE_TEST
 	help
 	  This selects a driver for the Atmel SPI Controller, present on
-	  many AT32 (AVR32) and AT91 (ARM) chips.
+	  many AT91 ARM chips.
 
 config SPI_AU1550
 	tristate "Au1550/Au1200/Au1300 SPI Controller"
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 5506a9c03c1f..e757afc1cfd0 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -87,7 +87,7 @@ config USB_MUSB_DA8XX
 config USB_MUSB_TUSB6010
 	tristate "TUSB6010"
 	depends on HAS_IOMEM
-	depends on (ARCH_OMAP2PLUS || COMPILE_TEST) && !BLACKFIN
+	depends on ARCH_OMAP2PLUS || COMPILE_TEST
 	depends on NOP_USB_XCEIV = USB_MUSB_HDRC # both built-in or both modules
 
 config USB_MUSB_OMAP2PLUS
diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
index 005ed87c8216..a9e398c144f8 100644
--- a/drivers/video/console/Kconfig
+++ b/drivers/video/console/Kconfig
@@ -6,8 +6,7 @@ menu "Console display driver support"
 
 config VGA_CONSOLE
 	bool "VGA text console" if EXPERT || !X86
-	depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC && !FRV && \
-		!SUPERH && !BLACKFIN && !AVR32 && !CRIS && \
+	depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC &&  !SUPERH && \
 		(!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) && \
 		!ARM64 && !ARC && !MICROBLAZE && !OPENRISC
 	default y
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 0e19679348d1..79020ce95de2 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -828,10 +828,6 @@ config BFIN_WDT
 	  To compile this driver as a module, choose M here: the
 	  module will be called bfin_wdt.
 
-# CRIS Architecture
-
-# FRV Architecture
-
 # X86 (i386 + ia64 + x86_64) Architecture
 
 config ACQUIRE_WDT
@@ -1431,8 +1427,6 @@ config NIC7018_WDT
 	  To compile this driver as a module, choose M here: the module will be
 	  called nic7018_wdt.
 
-# M32R Architecture
-
 # M68K Architecture
 
 config M54xx_WATCHDOG
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 0474d38aa854..1f9a0235f22c 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -94,10 +94,6 @@ obj-$(CONFIG_SPRD_WATCHDOG) += sprd_wdt.o
 # BLACKFIN Architecture
 obj-$(CONFIG_BFIN_WDT) += bfin_wdt.o
 
-# CRIS Architecture
-
-# FRV Architecture
-
 # X86 (i386 + ia64 + x86_64) Architecture
 obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
 obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
@@ -146,8 +142,6 @@ obj-$(CONFIG_INTEL_MEI_WDT) += mei_wdt.o
 obj-$(CONFIG_NI903X_WDT) += ni903x_wdt.o
 obj-$(CONFIG_NIC7018_WDT) += nic7018_wdt.o
 
-# M32R Architecture
-
 # M68K Architecture
 obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
 
diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index 58c2bbd385ad..57a27c42b5ac 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -1,6 +1,6 @@
 config BINFMT_ELF
 	bool "Kernel support for ELF binaries"
-	depends on MMU && (BROKEN || !FRV)
+	depends on MMU
 	select ELFCORE
 	default y
 	---help---
@@ -35,7 +35,7 @@ config ARCH_BINFMT_ELF_STATE
 config BINFMT_ELF_FDPIC
 	bool "Kernel support for FDPIC ELF binaries"
 	default y if !BINFMT_ELF
-	depends on (ARM || FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X)
+	depends on (ARM || (SUPERH32 && !MMU) || C6X)
 	select ELFCORE
 	help
 	  ELF FDPIC binaries are based on ELF, but allow the individual load
@@ -90,7 +90,6 @@ config BINFMT_SCRIPT
 config BINFMT_FLAT
 	bool "Kernel support for flat binaries"
 	depends on !MMU || ARM || M68K
-	depends on !FRV || BROKEN
 	help
 	  Support uClinux FLAT format binaries.
 
diff --git a/fs/minix/Kconfig b/fs/minix/Kconfig
index f2a0cfcef11d..bcd53a79156f 100644
--- a/fs/minix/Kconfig
+++ b/fs/minix/Kconfig
@@ -18,7 +18,7 @@ config MINIX_FS
 
 config MINIX_FS_NATIVE_ENDIAN
 	def_bool MINIX_FS
-	depends on M32R || MICROBLAZE || MIPS || S390 || SUPERH || SPARC || XTENSA || (M68K && !MMU)
+	depends on MICROBLAZE || MIPS || S390 || SUPERH || SPARC || XTENSA || (M68K && !MMU)
 
 config MINIX_FS_BIG_ENDIAN_16BIT_INDEXED
 	def_bool MINIX_FS
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 20d42c0d9fb6..1d6f16110eae 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -25,15 +25,10 @@
 #include <asm/byteorder.h>
 #include <asm/io.h>
 
-#if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
-# define SUPPORT_VLB_SYNC 0
-#else
-# define SUPPORT_VLB_SYNC 1
-#endif
-
 /*
  * Probably not wise to fiddle with these
  */
+#define SUPPORT_VLB_SYNC 1
 #define IDE_DEFAULT_MAX_FAILURES	1
 #define ERROR_MAX	8	/* Max read/write errors per sector */
 #define ERROR_RESET	3	/* Reset controller every 4th retry */
diff --git a/init/Kconfig b/init/Kconfig
index a14bcc9724a2..2852692d7c9c 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -998,7 +998,6 @@ config RELAY
 
 config BLK_DEV_INITRD
 	bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
-	depends on BROKEN || !FRV
 	help
 	  The initial RAM filesystem is a ramfs which is loaded by the
 	  boot loader (loadlin or lilo) and that is mounted as root
@@ -1108,7 +1107,7 @@ config MULTIUSER
 
 config SGETMASK_SYSCALL
 	bool "sgetmask/ssetmask syscalls support" if EXPERT
-	def_bool PARISC || BLACKFIN || M68K || PPC || MIPS || X86 || SPARC || CRIS || MICROBLAZE || SUPERH
+	def_bool PARISC || M68K || PPC || MIPS || X86 || SPARC || MICROBLAZE || SUPERH
 	---help---
 	  sys_sgetmask and sys_ssetmask are obsolete system calls
 	  no longer supported in libc but still enabled by default in some
@@ -1370,7 +1369,7 @@ config KALLSYMS_ABSOLUTE_PERCPU
 config KALLSYMS_BASE_RELATIVE
 	bool
 	depends on KALLSYMS
-	default !IA64 && !(TILE && 64BIT)
+	default !IA64
 	help
 	  Instead of emitting them as absolute values in the native word size,
 	  emit the symbol references in the kallsyms table as 32-bit entries,
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 41ac9d294245..6927c6d8d185 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -165,7 +165,7 @@ config DEBUG_INFO_REDUCED
 
 config DEBUG_INFO_SPLIT
 	bool "Produce split debuginfo in .dwo files"
-	depends on DEBUG_INFO && !FRV
+	depends on DEBUG_INFO
 	help
 	  Generate debug info into separate .dwo files. This significantly
 	  reduces the build directory size for builds with DEBUG_INFO,
@@ -354,10 +354,7 @@ config ARCH_WANT_FRAME_POINTERS
 
 config FRAME_POINTER
 	bool "Compile the kernel with frame pointers"
-	depends on DEBUG_KERNEL && \
-		(CRIS || M68K || FRV || UML || \
-		 SUPERH || BLACKFIN) || \
-		ARCH_WANT_FRAME_POINTERS
+	depends on DEBUG_KERNEL && (M68K || UML || SUPERH) || ARCH_WANT_FRAME_POINTERS
 	default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS
 	help
 	  If you say Y here the resulting kernel image will be slightly
@@ -1138,7 +1135,7 @@ config LOCKDEP
 	bool
 	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
 	select STACKTRACE
-	select FRAME_POINTER if !MIPS && !PPC && !ARM_UNWIND && !S390 && !MICROBLAZE && !ARC && !SCORE && !X86
+	select FRAME_POINTER if !MIPS && !PPC && !ARM_UNWIND && !S390 && !MICROBLAZE && !ARC && !X86
 	select KALLSYMS
 	select KALLSYMS_ALL
 
@@ -1571,7 +1568,7 @@ config FAULT_INJECTION_STACKTRACE_FILTER
 	depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
 	depends on !X86_64
 	select STACKTRACE
-	select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM_UNWIND && !ARC && !SCORE && !X86
+	select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM_UNWIND && !ARC && !X86
 	help
 	  Provide stacktrace filter for fault-injection capabilities
 
@@ -1969,7 +1966,7 @@ config STRICT_DEVMEM
 	bool "Filter access to /dev/mem"
 	depends on MMU && DEVMEM
 	depends on ARCH_HAS_DEVMEM_IS_ALLOWED
-	default y if TILE || PPC || X86 || ARM64
+	default y if PPC || X86 || ARM64
 	---help---
 	  If this option is disabled, you allow userspace (root) access to all
 	  of memory, including kernel and userspace memory. Accidental
diff --git a/lib/test_user_copy.c b/lib/test_user_copy.c
index a6556f3364d1..e161f0498f42 100644
--- a/lib/test_user_copy.c
+++ b/lib/test_user_copy.c
@@ -31,8 +31,6 @@
  * their capability at compile-time, we just have to opt-out certain archs.
  */
 #if BITS_PER_LONG == 64 || (!(defined(CONFIG_ARM) && !defined(MMU)) && \
-			    !defined(CONFIG_BLACKFIN) &&	\
-			    !defined(CONFIG_M32R) &&		\
 			    !defined(CONFIG_M68K) &&		\
 			    !defined(CONFIG_MICROBLAZE) &&	\
 			    !defined(CONFIG_NIOS2) &&		\
diff --git a/mm/Kconfig b/mm/Kconfig
index abefa573bcd8..d5004d82a1d6 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -278,13 +278,6 @@ config BOUNCE
 	  by default when ZONE_DMA or HIGHMEM is selected, but you
 	  may say n to override this.
 
-# On the 'tile' arch, USB OHCI needs the bounce pool since tilegx will often
-# have more than 4GB of memory, but we don't currently use the IOTLB to present
-# a 32-bit address to OHCI.  So we need to use a bounce pool instead.
-config NEED_BOUNCE_POOL
-	bool
-	default y if TILE && USB_OHCI_HCD
-
 config NR_QUICK
 	int
 	depends on QUICKLIST
diff --git a/mm/percpu.c b/mm/percpu.c
index 50e7fdf84055..79e3549cab0f 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2719,11 +2719,7 @@ void __init setup_per_cpu_areas(void)
 
 	if (pcpu_setup_first_chunk(ai, fc) < 0)
 		panic("Failed to initialize percpu areas.");
-#ifdef CONFIG_CRIS
-#warning "the CRIS architecture has physical and virtual addresses confused"
-#else
 	pcpu_free_alloc_info(ai);
-#endif
 }
 
 #endif	/* CONFIG_SMP */
-- 
2.9.0

Re: [PATCH 00/16] remove eight obsolete architectures

[David Howells]

Do we have anything left that still implements NOMMU?

David

Re: [PATCH 00/16] remove eight obsolete architectures

[Geert Uytterhoeven]

Hi David,

On Thu, Mar 15, 2018 at 10:42 AM, David Howells <dhowells@redhat.com> wrote:
> Do we have anything left that still implements NOMMU?

Sure: arm, c6x, m68k, microblaze, and  sh.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH 00/16] remove eight obsolete architectures

[Arnd Bergmann]

On Thu, Mar 15, 2018 at 10:42 AM, David Howells <dhowells@redhat.com> wrote:
> Do we have anything left that still implements NOMMU?

Yes, plenty. I was wondering the same thing, but it seems that the architectures
we remove are almost completely representative of what we support overall,
except that they are all not licensed to 3rd parties, unlike many of the ones we
keep.

I've made an overview of the remaining architectures for my own reference[1].
The remaining NOMMU architectures are:

- arch/arm has ARMv7-M (Cortex-M microcontroller), which is actually
gaining traction
- arch/sh has an open-source J2 core that was added not that long ago,
it seems to
  be the only SH compatible core that anyone is working on.
- arch/microblaze supports both MMU/NOMMU modes (most use an MMU)
- arch/m68k supports several NOMMU targets, both the coldfire SoCs and the
  classic processors
- c6x has no MMU

       Arnd

[1] https://docs.google.com/spreadsheets/d/1QxMvW5jpVG2jb4RM9CQQl27-wVpNYOa-_3K2RVKifb0

Re: [PATCH 00/16] remove eight obsolete architectures

[Hannes Reinecke]

On 03/15/2018 10:42 AM, David Howells wrote:
> Do we have anything left that still implements NOMMU?
> 
RISC-V ?
(evil grin :-)

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@suse.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)

Re: [PATCH 00/16] remove eight obsolete architectures

[Arnd Bergmann]

On Thu, Mar 15, 2018 at 10:59 AM, Hannes Reinecke <hare@suse.de> wrote:
> On 03/15/2018 10:42 AM, David Howells wrote:
>> Do we have anything left that still implements NOMMU?
>>
> RISC-V ?
> (evil grin :-)

Is anyone producing a chip that includes enough of the Privileged ISA spec
to have things like system calls, but not the MMU parts?

I thought at least initially the kernel only supports hardware that has a rather
complete feature set.

       Arnd

Re: [PATCH 11/16] treewide: simplify Kconfig dependencies for removed archs

[Kalle Valo]

Arnd Bergmann <arnd@arndb.de> writes:

> A lot of Kconfig symbols have architecture specific dependencies.
> In those cases that depend on architectures we have already removed,
> they can be omitted.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

[...]

>  drivers/net/wireless/cisco/Kconfig   |  2 +-

Acked-by: Kalle Valo <kvalo@codeaurora.org>

-- 
Kalle Valo

Re: [PATCH 00/16] remove eight obsolete architectures

[Christoph Hellwig]

On Thu, Mar 15, 2018 at 11:42:25AM +0100, Arnd Bergmann wrote:
> Is anyone producing a chip that includes enough of the Privileged ISA spec
> to have things like system calls, but not the MMU parts?

Various SiFive SOCs seem to support M and U mode, but no S mode or
iommu.  That should be enough for nommu Linux running in M mode if
someone cares enough to actually port it.

rfc: remove print_vma_addr ? (was Re: [PATCH 00/16] remove eight obsolete architectures)

[Joe Perches]

On Thu, 2018-03-15 at 10:48 +0100, Geert Uytterhoeven wrote:
> Hi David,
> 
> On Thu, Mar 15, 2018 at 10:42 AM, David Howells <dhowells@redhat.com> wrote:
> > Do we have anything left that still implements NOMMU?
> 
> Sure: arm, c6x, m68k, microblaze, and  sh.

I have a patchset that creates a vsprintf extension for
print_vma_addr and removes all the uses similar to the
print_symbol() removal.

This now avoids any possible printk interleaving.

Unfortunately, without some #ifdef in vsprintf, which
I would like to avoid, it increases the nommu kernel
size by ~500 bytes.

Anyone think this is acceptable?

Here's the overall patch, but I have it as a series
---
 Documentation/core-api/printk-formats.rst |  9 +++++
 arch/arm64/kernel/traps.c                 | 13 +++----
 arch/mips/mm/fault.c                      | 16 ++++-----
 arch/parisc/mm/fault.c                    | 15 ++++----
 arch/riscv/kernel/traps.c                 | 11 +++---
 arch/s390/mm/fault.c                      |  7 ++--
 arch/sparc/mm/fault_32.c                  |  8 ++---
 arch/sparc/mm/fault_64.c                  |  8 ++---
 arch/tile/kernel/signal.c                 |  9 ++---
 arch/um/kernel/trap.c                     | 13 +++----
 arch/x86/kernel/signal.c                  | 10 ++----
 arch/x86/kernel/traps.c                   | 18 ++++------
 arch/x86/mm/fault.c                       | 12 +++----
 include/linux/mm.h                        |  1 -
 lib/vsprintf.c                            | 58 ++++++++++++++++++++++++++-----
 mm/memory.c                               | 33 ------------------
 16 files changed, 112 insertions(+), 129 deletions(-)

diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst
index 934559b3c130..10a91da1bc83 100644
--- a/Documentation/core-api/printk-formats.rst
+++ b/Documentation/core-api/printk-formats.rst
@@ -157,6 +157,15 @@ DMA address types dma_addr_t
 For printing a dma_addr_t type which can vary based on build options,
 regardless of the width of the CPU data path.
 
+VMA name and address
+----------------------------
+
+::
+
+	%pav	<name>[hexstart+hexsize] or ?[0+0] if unavailable
+
+For any address, print the vma's name and its starting address and size
+
 Passed by reference.
 
 Raw buffer as an escaped string
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 2b478565d774..48edf812ce8b 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -242,13 +242,14 @@ void arm64_force_sig_info(struct siginfo *info, const char *str,
 	if (!show_unhandled_signals_ratelimited())
 		goto send_sig;
 
-	pr_info("%s[%d]: unhandled exception: ", tsk->comm, task_pid_nr(tsk));
 	if (esr)
-		pr_cont("%s, ESR 0x%08x, ", esr_get_class_string(esr), esr);
-
-	pr_cont("%s", str);
-	print_vma_addr(KERN_CONT " in ", regs->pc);
-	pr_cont("\n");
+		pr_info("%s[%d]: unhandled exception: %s, ESR 0x%08x, %s in %pav\n",
+			tsk->comm, task_pid_nr(tsk),
+			esr_get_class_string(esr), esr,
+			str, &regs->pc);
+	else
+		pr_info("%s[%d]: unhandled exception: %s in %pav\n",
+			tsk->comm, task_pid_nr(tsk), str, &regs->pc);
 	__show_regs(regs);
 
 send_sig:
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 4f8f5bf46977..ce7bf077a0f5 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -213,14 +213,14 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write,
 				tsk->comm,
 				write ? "write access to" : "read access from",
 				field, address);
-			pr_info("epc = %0*lx in", field,
-				(unsigned long) regs->cp0_epc);
-			print_vma_addr(KERN_CONT " ", regs->cp0_epc);
-			pr_cont("\n");
-			pr_info("ra  = %0*lx in", field,
-				(unsigned long) regs->regs[31]);
-			print_vma_addr(KERN_CONT " ", regs->regs[31]);
-			pr_cont("\n");
+			pr_info("epc = %0*lx in %pav\n",
+				field,
+				(unsigned long)regs->cp0_epc,
+				&regs->cp0_epc);
+			pr_info("ra  = %0*lx in %pav\n",
+				field,
+				(unsigned long)regs->regs[31],
+				&regs->regs[31]);
 		}
 		current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f;
 		info.si_signo = SIGSEGV;
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index e247edbca68e..877cea702714 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -240,17 +240,14 @@ show_signal_msg(struct pt_regs *regs, unsigned long code,
 	if (!printk_ratelimit())
 		return;
 
-	pr_warn("\n");
-	pr_warn("do_page_fault() command='%s' type=%lu address=0x%08lx",
-	    tsk->comm, code, address);
-	print_vma_addr(KERN_CONT " in ", regs->iaoq[0]);
-
-	pr_cont("\ntrap #%lu: %s%c", code, trap_name(code),
-		vma ? ',':'\n');
+	pr_warn("do_page_fault() command='%s' type=%lu address=0x%08lx in %pav\n",
+		tsk->comm, code, address, &regs->iaoq[0]);
 
 	if (vma)
-		pr_cont(" vm_start = 0x%08lx, vm_end = 0x%08lx\n",
-			vma->vm_start, vma->vm_end);
+		pr_warn("trap #%lu: %s%c, vm_start = 0x%08lx, vm_end = 0x%08lx\n",
+			code, trap_name(code), vma->vm_start, vma->vm_end);
+	else
+		pr_warn("trap #%lu: %s%c\n", code, trap_name(code));
 
 	show_regs(regs);
 }
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 93132cb59184..16609dcb2546 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -78,12 +78,11 @@ static inline void do_trap_siginfo(int signo, int code,
 void do_trap(struct pt_regs *regs, int signo, int code,
 	unsigned long addr, struct task_struct *tsk)
 {
-	if (show_unhandled_signals && unhandled_signal(tsk, signo)
-	    && printk_ratelimit()) {
-		pr_info("%s[%d]: unhandled signal %d code 0x%x at 0x" REG_FMT,
-			tsk->comm, task_pid_nr(tsk), signo, code, addr);
-		print_vma_addr(KERN_CONT " in ", GET_IP(regs));
-		pr_cont("\n");
+	if (show_unhandled_signals && unhandled_signal(tsk, signo) &&
+	    printk_ratelimit()) {
+		pr_info("%s[%d]: unhandled signal %d code 0x%x at 0x" REG_FMT " in %pav\n",
+			tsk->comm, task_pid_nr(tsk), signo, code, addr,
+			&GET_IP(regs));
 		show_regs(regs);
 	}
 
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 93faeca52284..3b1d6d618af2 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -250,10 +250,9 @@ void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault)
 		return;
 	if (!printk_ratelimit())
 		return;
-	printk(KERN_ALERT "User process fault: interruption code %04x ilc:%d ",
-	       regs->int_code & 0xffff, regs->int_code >> 17);
-	print_vma_addr(KERN_CONT "in ", regs->psw.addr);
-	printk(KERN_CONT "\n");
+	printk(KERN_ALERT "User process fault: interruption code %04x ilc:%d in %pav\n",
+	       regs->int_code & 0xffff, regs->int_code >> 17,
+	       &regs->psw.addr);
 	if (is_mm_fault)
 		dump_fault_info(regs);
 	show_regs(regs);
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index a8103a84b4ac..206ec5a1c915 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -113,15 +113,11 @@ show_signal_msg(struct pt_regs *regs, int sig, int code,
 	if (!printk_ratelimit())
 		return;
 
-	printk("%s%s[%d]: segfault at %lx ip %px (rpc %px) sp %px error %x",
+	printk("%s%s[%d]: segfault at %lx ip %px (rpc %px) sp %px error %x in %pav\n",
 	       task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
 	       tsk->comm, task_pid_nr(tsk), address,
 	       (void *)regs->pc, (void *)regs->u_regs[UREG_I7],
-	       (void *)regs->u_regs[UREG_FP], code);
-
-	print_vma_addr(KERN_CONT " in ", regs->pc);
-
-	printk(KERN_CONT "\n");
+	       (void *)regs->u_regs[UREG_FP], code, &regs->pc);
 }
 
 static void __do_fault_siginfo(int code, int sig, struct pt_regs *regs,
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 41363f46797b..a21199329ebe 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -154,15 +154,11 @@ show_signal_msg(struct pt_regs *regs, int sig, int code,
 	if (!printk_ratelimit())
 		return;
 
-	printk("%s%s[%d]: segfault at %lx ip %px (rpc %px) sp %px error %x",
+	printk("%s%s[%d]: segfault at %lx ip %px (rpc %px) sp %px error %x in %pav\b",
 	       task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
 	       tsk->comm, task_pid_nr(tsk), address,
 	       (void *)regs->tpc, (void *)regs->u_regs[UREG_I7],
-	       (void *)regs->u_regs[UREG_FP], code);
-
-	print_vma_addr(KERN_CONT " in ", regs->tpc);
-
-	printk(KERN_CONT "\n");
+	       (void *)regs->u_regs[UREG_FP], code, &regs->tpc);
 }
 
 static void do_fault_siginfo(int code, int sig, struct pt_regs *regs,
diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c
index f2bf557bb005..0556106dfe8a 100644
--- a/arch/tile/kernel/signal.c
+++ b/arch/tile/kernel/signal.c
@@ -383,13 +383,10 @@ void trace_unhandled_signal(const char *type, struct pt_regs *regs,
 	if (show_unhandled_signals <= 1 && !printk_ratelimit())
 		return;
 
-	printk("%s%s[%d]: %s at %lx pc "REGFMT" signal %d",
+	printk("%s%s[%d]: %s at %lx pc " REGFMT " signal %d in %pav\n",
 	       task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
-	       tsk->comm, task_pid_nr(tsk), type, address, regs->pc, sig);
-
-	print_vma_addr(KERN_CONT " in ", regs->pc);
-
-	printk(KERN_CONT "\n");
+	       tsk->comm, task_pid_nr(tsk), type, address, regs->pc, sig,
+	       &regs->pc);
 
 	if (show_unhandled_signals > 1) {
 		switch (sig) {
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index b2b02df9896e..9281248972c0 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -150,14 +150,11 @@ static void show_segv_info(struct uml_pt_regs *regs)
 	if (!printk_ratelimit())
 		return;
 
-	printk("%s%s[%d]: segfault at %lx ip %px sp %px error %x",
-		task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
-		tsk->comm, task_pid_nr(tsk), FAULT_ADDRESS(*fi),
-		(void *)UPT_IP(regs), (void *)UPT_SP(regs),
-		fi->error_code);
-
-	print_vma_addr(KERN_CONT " in ", UPT_IP(regs));
-	printk(KERN_CONT "\n");
+	printk("%s%s[%d]: segfault at %lx ip %px sp %px error %x in %pav\n",
+	       task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
+	       tsk->comm, task_pid_nr(tsk), FAULT_ADDRESS(*fi),
+	       (void *)UPT_IP(regs), (void *)UPT_SP(regs),
+	       fi->error_code, &UPT_IP(regs));
 }
 
 static void bad_segv(struct faultinfo fi, unsigned long ip)
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 4cdc0b27ec82..9ab0c5c50b29 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -841,15 +841,11 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
 {
 	struct task_struct *me = current;
 
-	if (show_unhandled_signals && printk_ratelimit()) {
-		printk("%s"
-		       "%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
+	if (show_unhandled_signals && printk_ratelimit())
+		printk("%s%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx in %pav\n",
 		       task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
 		       me->comm, me->pid, where, frame,
-		       regs->ip, regs->sp, regs->orig_ax);
-		print_vma_addr(KERN_CONT " in ", regs->ip);
-		pr_cont("\n");
-	}
+		       regs->ip, regs->sp, regs->orig_ax, &regs->ip);
 
 	force_sig(SIGSEGV, me);
 }
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 3d9b2308e7fa..c6e3d02759e5 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -270,13 +270,10 @@ do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
 	tsk->thread.trap_nr = trapnr;
 
 	if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
-	    printk_ratelimit()) {
-		pr_info("%s[%d] trap %s ip:%lx sp:%lx error:%lx",
+	    printk_ratelimit())
+		pr_info("%s[%d] trap %s ip:%lx sp:%lx error:%lx in %pav\n",
 			tsk->comm, tsk->pid, str,
-			regs->ip, regs->sp, error_code);
-		print_vma_addr(KERN_CONT " in ", regs->ip);
-		pr_cont("\n");
-	}
+			regs->ip, regs->sp, error_code, &regs->ip);
 
 	force_sig_info(signr, info ?: SEND_SIG_PRIV, tsk);
 }
@@ -565,13 +562,10 @@ do_general_protection(struct pt_regs *regs, long error_code)
 	tsk->thread.trap_nr = X86_TRAP_GP;
 
 	if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
-			printk_ratelimit()) {
-		pr_info("%s[%d] general protection ip:%lx sp:%lx error:%lx",
+			printk_ratelimit())
+		pr_info("%s[%d] general protection ip:%lx sp:%lx error:%lx in %pav\n",
 			tsk->comm, task_pid_nr(tsk),
-			regs->ip, regs->sp, error_code);
-		print_vma_addr(KERN_CONT " in ", regs->ip);
-		pr_cont("\n");
-	}
+			regs->ip, regs->sp, error_code, &regs->ip);
 
 	force_sig_info(SIGSEGV, SEND_SIG_PRIV, tsk);
 }
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index e6af2b464c3d..b629319e621a 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -857,14 +857,10 @@ show_signal_msg(struct pt_regs *regs, unsigned long error_code,
 	if (!printk_ratelimit())
 		return;
 
-	printk("%s%s[%d]: segfault at %lx ip %px sp %px error %lx",
-		task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
-		tsk->comm, task_pid_nr(tsk), address,
-		(void *)regs->ip, (void *)regs->sp, error_code);
-
-	print_vma_addr(KERN_CONT " in ", regs->ip);
-
-	printk(KERN_CONT "\n");
+	printk("%s%s[%d]: segfault at %lx ip %px sp %px error %lx in %pav\n",
+	       task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
+	       tsk->comm, task_pid_nr(tsk), address,
+	       (void *)regs->ip, (void *)regs->sp, error_code, &regs->ip);
 }
 
 static void
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9f1270360983..9584bd3e8c25 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2537,7 +2537,6 @@ extern int randomize_va_space;
 #endif
 
 const char * arch_vma_name(struct vm_area_struct *vma);
-void print_vma_addr(char *prefix, unsigned long rip);
 
 void sparse_mem_maps_populate_node(struct page **map_map,
 				   unsigned long pnum_begin,
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 942b5234a59b..9081476ea4ea 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -35,6 +35,8 @@
 #include <net/addrconf.h>
 #include <linux/siphash.h>
 #include <linux/compiler.h>
+#include <linux/mm_types.h>
+
 #ifdef CONFIG_BLOCK
 #include <linux/blkdev.h>
 #endif
@@ -407,6 +409,11 @@ struct printf_spec {
 #define FIELD_WIDTH_MAX ((1 << 23) - 1)
 #define PRECISION_MAX ((1 << 15) - 1)
 
+static const struct printf_spec strspec = {
+	.field_width = -1,
+	.precision = -1,
+};
+
 static noinline_for_stack
 char *number(char *buf, char *end, unsigned long long num,
 	     struct printf_spec spec)
@@ -1427,6 +1434,45 @@ char *netdev_bits(char *buf, char *end, const void *addr, const char *fmt)
 	return special_hex_number(buf, end, num, size);
 }
 
+static noinline_for_stack
+char *vma_addr(char *buf, char *end, const void *addr)
+{
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *vma;
+	char *page;
+	char tbuf[2 * sizeof(unsigned long) * 2 + 4];
+	const char *output = "?[0+0]";
+
+	/*
+	 * we might be running from an atomic context so we cannot sleep
+	 */
+	if (!down_read_trylock(&mm->mmap_sem))
+		goto output;
+
+	vma = find_vma(mm, *(unsigned long *)addr);
+	if (!vma || !vma->vm_file)
+		goto up_read;
+
+	page = (char *)__get_free_page(GFP_ATOMIC | __GFP_NOWARN);
+	if (page) {
+		char *fp;
+
+		fp = file_path(vma->vm_file, page, PAGE_SIZE);
+		if (IS_ERR(fp))
+			fp = "?";
+		buf = string(buf, end, kbasename(fp), strspec);
+		sprintf(tbuf, "[%lx+%lx]",
+			vma->vm_start, vma->vm_end - vma->vm_start);
+		output = tbuf;
+		free_page((unsigned long)page);
+	}
+
+up_read:
+	up_read(&mm->mmap_sem);
+output:
+	return string(buf, end, output, strspec);
+}
+
 static noinline_for_stack
 char *address_val(char *buf, char *end, const void *addr, const char *fmt)
 {
@@ -1434,6 +1480,8 @@ char *address_val(char *buf, char *end, const void *addr, const char *fmt)
 	int size;
 
 	switch (fmt[1]) {
+	case 'v':
+		return vma_addr(buf, end, addr);
 	case 'd':
 		num = *(const dma_addr_t *)addr;
 		size = sizeof(dma_addr_t);
@@ -1474,11 +1522,7 @@ char *format_flags(char *buf, char *end, unsigned long flags,
 					const struct trace_print_flags *names)
 {
 	unsigned long mask;
-	const struct printf_spec strspec = {
-		.field_width = -1,
-		.precision = -1,
-	};
-	const struct printf_spec numspec = {
+	static const struct printf_spec numspec = {
 		.flags = SPECIAL|SMALL,
 		.field_width = -1,
 		.precision = -1,
@@ -1548,10 +1592,6 @@ char *device_node_gen_full_name(const struct device_node *np, char *buf, char *e
 {
 	int depth;
 	const struct device_node *parent = np->parent;
-	static const struct printf_spec strspec = {
-		.field_width = -1,
-		.precision = -1,
-	};
 
 	/* special case for root node */
 	if (!parent)
diff --git a/mm/memory.c b/mm/memory.c
index bc760df8a7f4..f1f922421bde 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4502,39 +4502,6 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr,
 }
 EXPORT_SYMBOL_GPL(access_process_vm);
 
-/*
- * Print the name of a VMA.
- */
-void print_vma_addr(char *prefix, unsigned long ip)
-{
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
-
-	/*
-	 * we might be running from an atomic context so we cannot sleep
-	 */
-	if (!down_read_trylock(&mm->mmap_sem))
-		return;
-
-	vma = find_vma(mm, ip);
-	if (vma && vma->vm_file) {
-		struct file *f = vma->vm_file;
-		char *buf = (char *)__get_free_page(GFP_NOWAIT);
-		if (buf) {
-			char *p;
-
-			p = file_path(f, buf, PAGE_SIZE);
-			if (IS_ERR(p))
-				p = "?";
-			printk("%s%s[%lx+%lx]", prefix, kbasename(p),
-					vma->vm_start,
-					vma->vm_end - vma->vm_start);
-			free_page((unsigned long)buf);
-		}
-	}
-	up_read(&mm->mmap_sem);
-}
-
 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP)
 void __might_fault(const char *file, int line)
 {

Re: rfc: remove print_vma_addr ? (was Re: [PATCH 00/16] remove eight obsolete architectures)

[Matthew Wilcox]

On Thu, Mar 15, 2018 at 09:56:46AM -0700, Joe Perches wrote:
> I have a patchset that creates a vsprintf extension for
> print_vma_addr and removes all the uses similar to the
> print_symbol() removal.
> 
> This now avoids any possible printk interleaving.
> 
> Unfortunately, without some #ifdef in vsprintf, which
> I would like to avoid, it increases the nommu kernel
> size by ~500 bytes.
> 
> Anyone think this is acceptable?
> 
> Here's the overall patch, but I have it as a series
> ---
>  Documentation/core-api/printk-formats.rst |  9 +++++
>  arch/arm64/kernel/traps.c                 | 13 +++----
>  arch/mips/mm/fault.c                      | 16 ++++-----
>  arch/parisc/mm/fault.c                    | 15 ++++----
>  arch/riscv/kernel/traps.c                 | 11 +++---
>  arch/s390/mm/fault.c                      |  7 ++--
>  arch/sparc/mm/fault_32.c                  |  8 ++---
>  arch/sparc/mm/fault_64.c                  |  8 ++---
>  arch/tile/kernel/signal.c                 |  9 ++---
>  arch/um/kernel/trap.c                     | 13 +++----
>  arch/x86/kernel/signal.c                  | 10 ++----
>  arch/x86/kernel/traps.c                   | 18 ++++------
>  arch/x86/mm/fault.c                       | 12 +++----
>  include/linux/mm.h                        |  1 -
>  lib/vsprintf.c                            | 58 ++++++++++++++++++++++++++-----
>  mm/memory.c                               | 33 ------------------
>  16 files changed, 112 insertions(+), 129 deletions(-)

This doesn't feel like a huge win since it's only called ~once per
architecture.  I'd be more excited if it made the printing of the whole
thing standardised; eg we have a print_fault() function in mm/memory.c
which takes a suitable set of arguments.

Re: rfc: remove print_vma_addr ? (was Re: [PATCH 00/16] remove eight obsolete architectures)

[Joe Perches]

On Thu, 2018-03-15 at 10:08 -0700, Matthew Wilcox wrote:
> On Thu, Mar 15, 2018 at 09:56:46AM -0700, Joe Perches wrote:
> > I have a patchset that creates a vsprintf extension for
> > print_vma_addr and removes all the uses similar to the
> > print_symbol() removal.
> > 
> > This now avoids any possible printk interleaving.
> > 
> > Unfortunately, without some #ifdef in vsprintf, which
> > I would like to avoid, it increases the nommu kernel
> > size by ~500 bytes.
> > 
> > Anyone think this is acceptable?
[]
> This doesn't feel like a huge win since it's only called ~once per
> architecture.  I'd be more excited if it made the printing of the whole
> thing standardised; eg we have a print_fault() function in mm/memory.c
> which takes a suitable set of arguments.

Sure but perhaps that's not feasible as the surrounding output
is per-arch specific.

What could be a standardized fault message here?

Re: [PATCH 00/16] remove eight obsolete architectures

[afzal mohammed]

Hi,

On Thu, Mar 15, 2018 at 10:56:48AM +0100, Arnd Bergmann wrote:
> On Thu, Mar 15, 2018 at 10:42 AM, David Howells <dhowells@redhat.com> wrote:

> > Do we have anything left that still implements NOMMU?

Please don't kill !MMU.

> Yes, plenty.

> I've made an overview of the remaining architectures for my own reference[1].
> The remaining NOMMU architectures are:
> 
> - arch/arm has ARMv7-M (Cortex-M microcontroller), which is actually
> gaining traction

ARMv7-R as well, also seems ARM is coming up with more !MMU's - v8-M,
v8-R. In addition, though only of academic interest, ARM MMU capable
platform's can run !MMU Linux.

afzal

> - arch/sh has an open-source J2 core that was added not that long ago,
> it seems to
>   be the only SH compatible core that anyone is working on.
> - arch/microblaze supports both MMU/NOMMU modes (most use an MMU)
> - arch/m68k supports several NOMMU targets, both the coldfire SoCs and the
>   classic processors
> - c6x has no MMU

Re: [PATCH 11/16] treewide: simplify Kconfig dependencies for removed archs

[Alexandre Belloni]

On 14/03/2018 at 15:43:46 +0100, Arnd Bergmann wrote:
> A lot of Kconfig symbols have architecture specific dependencies.
> In those cases that depend on architectures we have already removed,
> they can be omitted.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  block/bounce.c                       |  2 +-
>  drivers/ide/Kconfig                  |  2 +-
>  drivers/ide/ide-generic.c            | 12 +-----------
>  drivers/input/joystick/analog.c      |  2 +-
>  drivers/isdn/hisax/Kconfig           | 10 +++++-----
>  drivers/net/ethernet/davicom/Kconfig |  2 +-
>  drivers/net/ethernet/smsc/Kconfig    |  6 +++---
>  drivers/net/wireless/cisco/Kconfig   |  2 +-
>  drivers/pwm/Kconfig                  |  2 +-
>  drivers/rtc/Kconfig                  |  2 +-

Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

>  drivers/spi/Kconfig                  |  4 ++--
>  drivers/usb/musb/Kconfig             |  2 +-
>  drivers/video/console/Kconfig        |  3 +--
>  drivers/watchdog/Kconfig             |  6 ------
>  drivers/watchdog/Makefile            |  6 ------
>  fs/Kconfig.binfmt                    |  5 ++---
>  fs/minix/Kconfig                     |  2 +-
>  include/linux/ide.h                  |  7 +------
>  init/Kconfig                         |  5 ++---
>  lib/Kconfig.debug                    | 13 +++++--------
>  lib/test_user_copy.c                 |  2 --
>  mm/Kconfig                           |  7 -------
>  mm/percpu.c                          |  4 ----
>  23 files changed, 31 insertions(+), 77 deletions(-)
> 
> diff --git a/block/bounce.c b/block/bounce.c
> index 6a3e68292273..dd0b93f2a871 100644
> --- a/block/bounce.c
> +++ b/block/bounce.c
> @@ -31,7 +31,7 @@
>  static struct bio_set *bounce_bio_set, *bounce_bio_split;
>  static mempool_t *page_pool, *isa_page_pool;
>  
> -#if defined(CONFIG_HIGHMEM) || defined(CONFIG_NEED_BOUNCE_POOL)
> +#if defined(CONFIG_HIGHMEM)
>  static __init int init_emergency_pool(void)
>  {
>  #if defined(CONFIG_HIGHMEM) && !defined(CONFIG_MEMORY_HOTPLUG)
> diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
> index cf1fb3fb5d26..901b8833847f 100644
> --- a/drivers/ide/Kconfig
> +++ b/drivers/ide/Kconfig
> @@ -200,7 +200,7 @@ comment "IDE chipset support/bugfixes"
>  
>  config IDE_GENERIC
>  	tristate "generic/default IDE chipset support"
> -	depends on ALPHA || X86 || IA64 || M32R || MIPS || ARCH_RPC
> +	depends on ALPHA || X86 || IA64 || MIPS || ARCH_RPC
>  	default ARM && ARCH_RPC
>  	help
>  	  This is the generic IDE driver.  This driver attaches to the
> diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
> index 54d7c4685d23..80c0d69b83ac 100644
> --- a/drivers/ide/ide-generic.c
> +++ b/drivers/ide/ide-generic.c
> @@ -13,13 +13,10 @@
>  #include <linux/ide.h>
>  #include <linux/pci_ids.h>
>  
> -/* FIXME: convert arm and m32r to use ide_platform host driver */
> +/* FIXME: convert arm to use ide_platform host driver */
>  #ifdef CONFIG_ARM
>  #include <asm/irq.h>
>  #endif
> -#ifdef CONFIG_M32R
> -#include <asm/m32r.h>
> -#endif
>  
>  #define DRV_NAME	"ide_generic"
>  
> @@ -35,13 +32,6 @@ static const struct ide_port_info ide_generic_port_info = {
>  #ifdef CONFIG_ARM
>  static const u16 legacy_bases[] = { 0x1f0 };
>  static const int legacy_irqs[]  = { IRQ_HARDDISK };
> -#elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
> -      defined(CONFIG_PLAT_OPSPUT)
> -static const u16 legacy_bases[] = { 0x1f0 };
> -static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
> -#elif defined(CONFIG_PLAT_MAPPI3)
> -static const u16 legacy_bases[] = { 0x1f0, 0x170 };
> -static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
>  #elif defined(CONFIG_ALPHA)
>  static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
>  static const int legacy_irqs[]  = { 14, 15, 11, 10 };
> diff --git a/drivers/input/joystick/analog.c b/drivers/input/joystick/analog.c
> index be1b4921f22a..eefac7978f93 100644
> --- a/drivers/input/joystick/analog.c
> +++ b/drivers/input/joystick/analog.c
> @@ -163,7 +163,7 @@ static unsigned int get_time_pit(void)
>  #define GET_TIME(x)	do { x = (unsigned int)rdtsc(); } while (0)
>  #define DELTA(x,y)	((y)-(x))
>  #define TIME_NAME	"TSC"
> -#elif defined(__alpha__) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_RISCV) || defined(CONFIG_TILE)
> +#elif defined(__alpha__) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
>  #define GET_TIME(x)	do { x = get_cycles(); } while (0)
>  #define DELTA(x,y)	((y)-(x))
>  #define TIME_NAME	"get_cycles"
> diff --git a/drivers/isdn/hisax/Kconfig b/drivers/isdn/hisax/Kconfig
> index eb83d94ab4fe..38cfc8baae19 100644
> --- a/drivers/isdn/hisax/Kconfig
> +++ b/drivers/isdn/hisax/Kconfig
> @@ -109,7 +109,7 @@ config HISAX_16_3
>  
>  config HISAX_TELESPCI
>  	bool "Teles PCI"
> -	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN)))
> +	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN)))
>  	help
>  	  This enables HiSax support for the Teles PCI.
>  	  See <file:Documentation/isdn/README.HiSax> on how to configure it.
> @@ -237,7 +237,7 @@ config HISAX_MIC
>  
>  config HISAX_NETJET
>  	bool "NETjet card"
> -	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
> +	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
>  	depends on VIRT_TO_BUS
>  	help
>  	  This enables HiSax support for the NetJet from Traverse
> @@ -249,7 +249,7 @@ config HISAX_NETJET
>  
>  config HISAX_NETJET_U
>  	bool "NETspider U card"
> -	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
> +	depends on PCI && (BROKEN || !(PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN) || MICROBLAZE))
>  	depends on VIRT_TO_BUS
>  	help
>  	  This enables HiSax support for the Netspider U interface ISDN card
> @@ -318,7 +318,7 @@ config HISAX_GAZEL
>  
>  config HISAX_HFC_PCI
>  	bool "HFC PCI-Bus cards"
> -	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN)))
> +	depends on PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN)))
>  	help
>  	  This enables HiSax support for the HFC-S PCI 2BDS0 based cards.
>  
> @@ -343,7 +343,7 @@ config HISAX_HFC_SX
>  
>  config HISAX_ENTERNOW_PCI
>  	bool "Formula-n enter:now PCI card"
> -	depends on HISAX_NETJET && PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || FRV || (XTENSA && !CPU_LITTLE_ENDIAN)))
> +	depends on HISAX_NETJET && PCI && (BROKEN || !(SPARC || PPC || PARISC || M68K || (MIPS && !CPU_LITTLE_ENDIAN) || (XTENSA && !CPU_LITTLE_ENDIAN)))
>  	help
>  	  This enables HiSax support for the Formula-n enter:now PCI
>  	  ISDN card.
> diff --git a/drivers/net/ethernet/davicom/Kconfig b/drivers/net/ethernet/davicom/Kconfig
> index 7ec2d74f94d3..680a6d983f37 100644
> --- a/drivers/net/ethernet/davicom/Kconfig
> +++ b/drivers/net/ethernet/davicom/Kconfig
> @@ -4,7 +4,7 @@
>  
>  config DM9000
>  	tristate "DM9000 support"
> -	depends on ARM || BLACKFIN || MIPS || COLDFIRE || NIOS2
> +	depends on ARM || MIPS || COLDFIRE || NIOS2
>  	select CRC32
>  	select MII
>  	---help---
> diff --git a/drivers/net/ethernet/smsc/Kconfig b/drivers/net/ethernet/smsc/Kconfig
> index 948603e9b905..3da0c573d2ab 100644
> --- a/drivers/net/ethernet/smsc/Kconfig
> +++ b/drivers/net/ethernet/smsc/Kconfig
> @@ -5,8 +5,8 @@
>  config NET_VENDOR_SMSC
>  	bool "SMC (SMSC)/Western Digital devices"
>  	default y
> -	depends on ARM || ARM64 || ATARI_ETHERNAT || BLACKFIN || COLDFIRE || \
> -		   ISA || M32R || MAC || MIPS || NIOS2 || PCI || \
> +	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
> +		   ISA || MAC || MIPS || NIOS2 || PCI || \
>  		   PCMCIA || SUPERH || XTENSA || H8300
>  	---help---
>  	  If you have a network (Ethernet) card belonging to this class, say Y.
> @@ -37,7 +37,7 @@ config SMC91X
>  	select CRC32
>  	select MII
>  	depends on !OF || GPIOLIB
> -	depends on ARM || ARM64 || ATARI_ETHERNAT || BLACKFIN || COLDFIRE || \
> +	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
>  		   M32R || MIPS || NIOS2 || SUPERH || XTENSA || H8300
>  	---help---
>  	  This is a driver for SMC's 91x series of Ethernet chipsets,
> diff --git a/drivers/net/wireless/cisco/Kconfig b/drivers/net/wireless/cisco/Kconfig
> index b22567dff893..8ed0b154bb33 100644
> --- a/drivers/net/wireless/cisco/Kconfig
> +++ b/drivers/net/wireless/cisco/Kconfig
> @@ -33,7 +33,7 @@ config AIRO
>  
>  config AIRO_CS
>  	tristate "Cisco/Aironet 34X/35X/4500/4800 PCMCIA cards"
> -	depends on CFG80211 && PCMCIA && (BROKEN || !M32R)
> +	depends on CFG80211 && PCMCIA
>  	select WIRELESS_EXT
>  	select WEXT_SPY
>  	select WEXT_PRIV
> diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
> index 763ee50ea57d..f16aad3bf5d6 100644
> --- a/drivers/pwm/Kconfig
> +++ b/drivers/pwm/Kconfig
> @@ -43,7 +43,7 @@ config PWM_AB8500
>  
>  config PWM_ATMEL
>  	tristate "Atmel PWM support"
> -	depends on ARCH_AT91 || AVR32
> +	depends on ARCH_AT91
>  	help
>  	  Generic PWM framework driver for Atmel SoC.
>  
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index be5a3dc99c11..46af10ac45fc 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -868,7 +868,7 @@ comment "Platform RTC drivers"
>  
>  config RTC_DRV_CMOS
>  	tristate "PC-style 'CMOS'"
> -	depends on X86 || ARM || M32R || PPC || MIPS || SPARC64
> +	depends on X86 || ARM || PPC || MIPS || SPARC64
>  	default y if X86
>  	select RTC_MC146818_LIB
>  	help
> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
> index 603783976b81..103c13fcefa0 100644
> --- a/drivers/spi/Kconfig
> +++ b/drivers/spi/Kconfig
> @@ -72,10 +72,10 @@ config SPI_ARMADA_3700
>  config SPI_ATMEL
>  	tristate "Atmel SPI Controller"
>  	depends on HAS_DMA
> -	depends on (ARCH_AT91 || AVR32 || COMPILE_TEST)
> +	depends on ARCH_AT91 || COMPILE_TEST
>  	help
>  	  This selects a driver for the Atmel SPI Controller, present on
> -	  many AT32 (AVR32) and AT91 (ARM) chips.
> +	  many AT91 ARM chips.
>  
>  config SPI_AU1550
>  	tristate "Au1550/Au1200/Au1300 SPI Controller"
> diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
> index 5506a9c03c1f..e757afc1cfd0 100644
> --- a/drivers/usb/musb/Kconfig
> +++ b/drivers/usb/musb/Kconfig
> @@ -87,7 +87,7 @@ config USB_MUSB_DA8XX
>  config USB_MUSB_TUSB6010
>  	tristate "TUSB6010"
>  	depends on HAS_IOMEM
> -	depends on (ARCH_OMAP2PLUS || COMPILE_TEST) && !BLACKFIN
> +	depends on ARCH_OMAP2PLUS || COMPILE_TEST
>  	depends on NOP_USB_XCEIV = USB_MUSB_HDRC # both built-in or both modules
>  
>  config USB_MUSB_OMAP2PLUS
> diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
> index 005ed87c8216..a9e398c144f8 100644
> --- a/drivers/video/console/Kconfig
> +++ b/drivers/video/console/Kconfig
> @@ -6,8 +6,7 @@ menu "Console display driver support"
>  
>  config VGA_CONSOLE
>  	bool "VGA text console" if EXPERT || !X86
> -	depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC && !FRV && \
> -		!SUPERH && !BLACKFIN && !AVR32 && !CRIS && \
> +	depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC &&  !SUPERH && \
>  		(!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) && \
>  		!ARM64 && !ARC && !MICROBLAZE && !OPENRISC
>  	default y
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index 0e19679348d1..79020ce95de2 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -828,10 +828,6 @@ config BFIN_WDT
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called bfin_wdt.
>  
> -# CRIS Architecture
> -
> -# FRV Architecture
> -
>  # X86 (i386 + ia64 + x86_64) Architecture
>  
>  config ACQUIRE_WDT
> @@ -1431,8 +1427,6 @@ config NIC7018_WDT
>  	  To compile this driver as a module, choose M here: the module will be
>  	  called nic7018_wdt.
>  
> -# M32R Architecture
> -
>  # M68K Architecture
>  
>  config M54xx_WATCHDOG
> diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
> index 0474d38aa854..1f9a0235f22c 100644
> --- a/drivers/watchdog/Makefile
> +++ b/drivers/watchdog/Makefile
> @@ -94,10 +94,6 @@ obj-$(CONFIG_SPRD_WATCHDOG) += sprd_wdt.o
>  # BLACKFIN Architecture
>  obj-$(CONFIG_BFIN_WDT) += bfin_wdt.o
>  
> -# CRIS Architecture
> -
> -# FRV Architecture
> -
>  # X86 (i386 + ia64 + x86_64) Architecture
>  obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
>  obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
> @@ -146,8 +142,6 @@ obj-$(CONFIG_INTEL_MEI_WDT) += mei_wdt.o
>  obj-$(CONFIG_NI903X_WDT) += ni903x_wdt.o
>  obj-$(CONFIG_NIC7018_WDT) += nic7018_wdt.o
>  
> -# M32R Architecture
> -
>  # M68K Architecture
>  obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
>  
> diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
> index 58c2bbd385ad..57a27c42b5ac 100644
> --- a/fs/Kconfig.binfmt
> +++ b/fs/Kconfig.binfmt
> @@ -1,6 +1,6 @@
>  config BINFMT_ELF
>  	bool "Kernel support for ELF binaries"
> -	depends on MMU && (BROKEN || !FRV)
> +	depends on MMU
>  	select ELFCORE
>  	default y
>  	---help---
> @@ -35,7 +35,7 @@ config ARCH_BINFMT_ELF_STATE
>  config BINFMT_ELF_FDPIC
>  	bool "Kernel support for FDPIC ELF binaries"
>  	default y if !BINFMT_ELF
> -	depends on (ARM || FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X)
> +	depends on (ARM || (SUPERH32 && !MMU) || C6X)
>  	select ELFCORE
>  	help
>  	  ELF FDPIC binaries are based on ELF, but allow the individual load
> @@ -90,7 +90,6 @@ config BINFMT_SCRIPT
>  config BINFMT_FLAT
>  	bool "Kernel support for flat binaries"
>  	depends on !MMU || ARM || M68K
> -	depends on !FRV || BROKEN
>  	help
>  	  Support uClinux FLAT format binaries.
>  
> diff --git a/fs/minix/Kconfig b/fs/minix/Kconfig
> index f2a0cfcef11d..bcd53a79156f 100644
> --- a/fs/minix/Kconfig
> +++ b/fs/minix/Kconfig
> @@ -18,7 +18,7 @@ config MINIX_FS
>  
>  config MINIX_FS_NATIVE_ENDIAN
>  	def_bool MINIX_FS
> -	depends on M32R || MICROBLAZE || MIPS || S390 || SUPERH || SPARC || XTENSA || (M68K && !MMU)
> +	depends on MICROBLAZE || MIPS || S390 || SUPERH || SPARC || XTENSA || (M68K && !MMU)
>  
>  config MINIX_FS_BIG_ENDIAN_16BIT_INDEXED
>  	def_bool MINIX_FS
> diff --git a/include/linux/ide.h b/include/linux/ide.h
> index 20d42c0d9fb6..1d6f16110eae 100644
> --- a/include/linux/ide.h
> +++ b/include/linux/ide.h
> @@ -25,15 +25,10 @@
>  #include <asm/byteorder.h>
>  #include <asm/io.h>
>  
> -#if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
> -# define SUPPORT_VLB_SYNC 0
> -#else
> -# define SUPPORT_VLB_SYNC 1
> -#endif
> -
>  /*
>   * Probably not wise to fiddle with these
>   */
> +#define SUPPORT_VLB_SYNC 1
>  #define IDE_DEFAULT_MAX_FAILURES	1
>  #define ERROR_MAX	8	/* Max read/write errors per sector */
>  #define ERROR_RESET	3	/* Reset controller every 4th retry */
> diff --git a/init/Kconfig b/init/Kconfig
> index a14bcc9724a2..2852692d7c9c 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -998,7 +998,6 @@ config RELAY
>  
>  config BLK_DEV_INITRD
>  	bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
> -	depends on BROKEN || !FRV
>  	help
>  	  The initial RAM filesystem is a ramfs which is loaded by the
>  	  boot loader (loadlin or lilo) and that is mounted as root
> @@ -1108,7 +1107,7 @@ config MULTIUSER
>  
>  config SGETMASK_SYSCALL
>  	bool "sgetmask/ssetmask syscalls support" if EXPERT
> -	def_bool PARISC || BLACKFIN || M68K || PPC || MIPS || X86 || SPARC || CRIS || MICROBLAZE || SUPERH
> +	def_bool PARISC || M68K || PPC || MIPS || X86 || SPARC || MICROBLAZE || SUPERH
>  	---help---
>  	  sys_sgetmask and sys_ssetmask are obsolete system calls
>  	  no longer supported in libc but still enabled by default in some
> @@ -1370,7 +1369,7 @@ config KALLSYMS_ABSOLUTE_PERCPU
>  config KALLSYMS_BASE_RELATIVE
>  	bool
>  	depends on KALLSYMS
> -	default !IA64 && !(TILE && 64BIT)
> +	default !IA64
>  	help
>  	  Instead of emitting them as absolute values in the native word size,
>  	  emit the symbol references in the kallsyms table as 32-bit entries,
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 41ac9d294245..6927c6d8d185 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -165,7 +165,7 @@ config DEBUG_INFO_REDUCED
>  
>  config DEBUG_INFO_SPLIT
>  	bool "Produce split debuginfo in .dwo files"
> -	depends on DEBUG_INFO && !FRV
> +	depends on DEBUG_INFO
>  	help
>  	  Generate debug info into separate .dwo files. This significantly
>  	  reduces the build directory size for builds with DEBUG_INFO,
> @@ -354,10 +354,7 @@ config ARCH_WANT_FRAME_POINTERS
>  
>  config FRAME_POINTER
>  	bool "Compile the kernel with frame pointers"
> -	depends on DEBUG_KERNEL && \
> -		(CRIS || M68K || FRV || UML || \
> -		 SUPERH || BLACKFIN) || \
> -		ARCH_WANT_FRAME_POINTERS
> +	depends on DEBUG_KERNEL && (M68K || UML || SUPERH) || ARCH_WANT_FRAME_POINTERS
>  	default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS
>  	help
>  	  If you say Y here the resulting kernel image will be slightly
> @@ -1138,7 +1135,7 @@ config LOCKDEP
>  	bool
>  	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
>  	select STACKTRACE
> -	select FRAME_POINTER if !MIPS && !PPC && !ARM_UNWIND && !S390 && !MICROBLAZE && !ARC && !SCORE && !X86
> +	select FRAME_POINTER if !MIPS && !PPC && !ARM_UNWIND && !S390 && !MICROBLAZE && !ARC && !X86
>  	select KALLSYMS
>  	select KALLSYMS_ALL
>  
> @@ -1571,7 +1568,7 @@ config FAULT_INJECTION_STACKTRACE_FILTER
>  	depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
>  	depends on !X86_64
>  	select STACKTRACE
> -	select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM_UNWIND && !ARC && !SCORE && !X86
> +	select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM_UNWIND && !ARC && !X86
>  	help
>  	  Provide stacktrace filter for fault-injection capabilities
>  
> @@ -1969,7 +1966,7 @@ config STRICT_DEVMEM
>  	bool "Filter access to /dev/mem"
>  	depends on MMU && DEVMEM
>  	depends on ARCH_HAS_DEVMEM_IS_ALLOWED
> -	default y if TILE || PPC || X86 || ARM64
> +	default y if PPC || X86 || ARM64
>  	---help---
>  	  If this option is disabled, you allow userspace (root) access to all
>  	  of memory, including kernel and userspace memory. Accidental
> diff --git a/lib/test_user_copy.c b/lib/test_user_copy.c
> index a6556f3364d1..e161f0498f42 100644
> --- a/lib/test_user_copy.c
> +++ b/lib/test_user_copy.c
> @@ -31,8 +31,6 @@
>   * their capability at compile-time, we just have to opt-out certain archs.
>   */
>  #if BITS_PER_LONG == 64 || (!(defined(CONFIG_ARM) && !defined(MMU)) && \
> -			    !defined(CONFIG_BLACKFIN) &&	\
> -			    !defined(CONFIG_M32R) &&		\
>  			    !defined(CONFIG_M68K) &&		\
>  			    !defined(CONFIG_MICROBLAZE) &&	\
>  			    !defined(CONFIG_NIOS2) &&		\
> diff --git a/mm/Kconfig b/mm/Kconfig
> index abefa573bcd8..d5004d82a1d6 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -278,13 +278,6 @@ config BOUNCE
>  	  by default when ZONE_DMA or HIGHMEM is selected, but you
>  	  may say n to override this.
>  
> -# On the 'tile' arch, USB OHCI needs the bounce pool since tilegx will often
> -# have more than 4GB of memory, but we don't currently use the IOTLB to present
> -# a 32-bit address to OHCI.  So we need to use a bounce pool instead.
> -config NEED_BOUNCE_POOL
> -	bool
> -	default y if TILE && USB_OHCI_HCD
> -
>  config NR_QUICK
>  	int
>  	depends on QUICKLIST
> diff --git a/mm/percpu.c b/mm/percpu.c
> index 50e7fdf84055..79e3549cab0f 100644
> --- a/mm/percpu.c
> +++ b/mm/percpu.c
> @@ -2719,11 +2719,7 @@ void __init setup_per_cpu_areas(void)
>  
>  	if (pcpu_setup_first_chunk(ai, fc) < 0)
>  		panic("Failed to initialize percpu areas.");
> -#ifdef CONFIG_CRIS
> -#warning "the CRIS architecture has physical and virtual addresses confused"
> -#else
>  	pcpu_free_alloc_info(ai);
> -#endif
>  }
>  
>  #endif	/* CONFIG_SMP */
> -- 
> 2.9.0
> 

-- 
Alexandre Belloni, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH 00/16] remove eight obsolete architectures

[Palmer Dabbelt]

On Thu, 15 Mar 2018 03:42:25 PDT (-0700), Arnd Bergmann wrote:
> On Thu, Mar 15, 2018 at 10:59 AM, Hannes Reinecke <hare@suse.de> wrote:
>> On 03/15/2018 10:42 AM, David Howells wrote:
>>> Do we have anything left that still implements NOMMU?
>>>
>> RISC-V ?
>> (evil grin :-)
>
> Is anyone producing a chip that includes enough of the Privileged ISA spec
> to have things like system calls, but not the MMU parts?
>
> I thought at least initially the kernel only supports hardware that has a rather
> complete feature set.

We currently do not have a NOMMU port.  As far as I know, everyone who's
currently producing RISC-V hardware with enough memory to run Linux has S mode
with paging support.  The ISA allows for S mode without paging but there's no
hardware for that -- if you're going to put a DRAM controller on there then
paging seems pretty cheap.  You could run a NOMMU port on a system with S-mode
and paging, but With all the superpage stuff I don't think you'll get an
appreciable performance win for any workload running without an MMU so there's
nothing to justify the work (and incompatibility) of a NOMMU port there.

While I think you could implement a NOMMU port on a machine with only M and U
modes (and therefor no address translation at all), I don't know of any MU-only
machines that have enough memory to run Linux (ours have less than 32KiB).  A
SBI-free Linux would be a prerequisite for this, but there's some interest in
that outside of a NOMMU port so it might materialize anyway.

Of course, QEMU could probably be tricked into emulating one of these machines
with little to no effort :)...  That said, I doubt we'll see a NOMMU port
materialize without some real hardware as it's a lot of work for a QEMU-only
target.