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From: Yury Norov <ynorov@caviumnetworks.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	Arnd Bergmann <arnd@arndb.de>
Cc: Yury Norov <ynorov@caviumnetworks.com>,
	Andrew Pinski <pinskia@gmail.com>,
	Andrew Pinski <Andrew.Pinski@caviumnetworks.com>,
	Adam Borowski <kilobyte@angband.pl>,
	Chris Metcalf <cmetcalf@ezchip.com>,
	Steve Ellcey <sellcey@caviumnetworks.com>,
	Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>,
	Ramana Radhakrishnan <ramana.gcc@googlemail.com>,
	Florian Weimer <fweimer@redhat.com>,
	Bamvor Zhangjian <bamvor.zhangjian@huawei.com>,
	Andreas Schwab <schwab@suse.de>,
	Chris Metcalf <cmetcalf@mellanox.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	schwidefsky@de.ibm.com, broonie@kernel.org,
	Joseph Myers <joseph@codesourcery.com>,
	christoph.muellner@theobroma-systems.com, szabolcs.nagy@arm.com,
	klimov.linux@gmail.com, Nathan_Lynch@mentor.com, agraf@suse.de,
	Prasun.Kapoor@caviumnetworks.com, geert@linux-m68k.org,
	philipp.tomsich@theobroma-systems.com,
	manuel.montezelo@gmail.com, linyongting@huawei.com,
	davem@davemloft.net, zhouchengming1@huawei.com
Subject: [PATCH 02/20] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option
Date: Sun,  4 Jun 2017 14:59:51 +0300	[thread overview]
Message-ID: <20170604120009.342-3-ynorov@caviumnetworks.com> (raw)
In-Reply-To: <20170604120009.342-1-ynorov@caviumnetworks.com>

All new 32-bit architectures should have 64-bit off_t type, but existing
architectures has 32-bit ones.

To handle it, new config option is added to arch/Kconfig that defaults
ARCH_32BIT_OFF_T to be disabled for non-64 bit architectures. All existing
32-bit architectures enable it explicitly here.

New option affects force_o_largefile() behaviour. Namely, if off_t is
64-bits long, we have no reason to reject user to open big files.

Note that even if architectures has only 64-bit off_t in the kernel
(arc, c6x, h8300, hexagon, metag, nios2, openrisc, tile32 and unicore32),
a libc may use 32-bit off_t, and therefore want to limit the file size
to 4GB unless specified differently in the open flags.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/Kconfig            | 4 ++++
 arch/arc/Kconfig        | 1 +
 arch/arm/Kconfig        | 1 +
 arch/blackfin/Kconfig   | 1 +
 arch/cris/Kconfig       | 1 +
 arch/frv/Kconfig        | 1 +
 arch/h8300/Kconfig      | 1 +
 arch/hexagon/Kconfig    | 1 +
 arch/m32r/Kconfig       | 1 +
 arch/m68k/Kconfig       | 1 +
 arch/metag/Kconfig      | 1 +
 arch/microblaze/Kconfig | 1 +
 arch/mips/Kconfig       | 1 +
 arch/mn10300/Kconfig    | 1 +
 arch/nios2/Kconfig      | 1 +
 arch/openrisc/Kconfig   | 1 +
 arch/parisc/Kconfig     | 1 +
 arch/powerpc/Kconfig    | 1 +
 arch/score/Kconfig      | 1 +
 arch/sh/Kconfig         | 1 +
 arch/sparc/Kconfig      | 1 +
 arch/tile/Kconfig       | 1 +
 arch/unicore32/Kconfig  | 1 +
 arch/x86/Kconfig        | 1 +
 arch/x86/um/Kconfig     | 1 +
 arch/xtensa/Kconfig     | 1 +
 include/linux/fcntl.h   | 2 +-
 27 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 3eac97a4c7b3..7adcd88529ef 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -246,6 +246,10 @@ config ARCH_THREAD_STACK_ALLOCATOR
 config ARCH_WANTS_DYNAMIC_TASK_STRUCT
 	bool
 
+config ARCH_32BIT_OFF_T
+	bool
+	depends on !64BIT
+
 config HAVE_REGS_AND_STACK_ACCESS_API
 	bool
 	help
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index a5459698f0ee..cab9c53e0354 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -11,6 +11,7 @@ config ARC
 	select ARC_TIMERS
 	select ARCH_HAS_SG_CHAIN
 	select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
+	select ARCH_32BIT_OFF_T
 	select BUILDTIME_EXTABLE_SORT
 	select CLONE_BACKWARDS
 	select COMMON_CLK
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4c1a35f15838..39e685e591ad 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1,6 +1,7 @@
 config ARM
 	bool
 	default y
+	select ARCH_32BIT_OFF_T
 	select ARCH_CLOCKSOURCE_DATA
 	select ARCH_HAS_DEBUG_VIRTUAL
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 3c1bd640042a..26418e78f06b 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -12,6 +12,7 @@ config RWSEM_XCHGADD_ALGORITHM
 
 config BLACKFIN
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_DYNAMIC_FTRACE
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 71b758dc3a96..8c059f07ddb6 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -50,6 +50,7 @@ config LOCKDEP_SUPPORT
 config CRIS
 	bool
 	default y
+	select ARCH_32BIT_OFF_T
 	select HAVE_IDE
 	select GENERIC_ATOMIC64
 	select HAVE_UID16
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index eefd9a4ed156..2f1490448fd4 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -1,6 +1,7 @@
 config FRV
 	bool
 	default y
+	select ARCH_32BIT_OFF_T
 	select HAVE_IDE
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_PERF_EVENTS
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 3ae852507e57..29bbcb1c8676 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -1,5 +1,6 @@
 config H8300
         def_bool y
+	select ARCH_32BIT_OFF_T
 	select GENERIC_ATOMIC64
 	select HAVE_UID16
 	select VIRT_TO_BUS
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 1941e4baaee6..bbcea8c33e44 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -3,6 +3,7 @@ comment "Linux Kernel Configuration for Hexagon"
 
 config HEXAGON
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select HAVE_OPROFILE
 	# Other pending projects/to-do items.
 	# select HAVE_REGS_AND_STACK_ACCESS_API
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index 95474460b367..d6d19f6ba39d 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -1,6 +1,7 @@
 config M32R
 	bool
 	default y
+	select ARCH_32BIT_OFF_T
 	select HAVE_IDE
 	select HAVE_OPROFILE
 	select INIT_ALL_POSSIBLE
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index d140206d5d29..ed6f90ca2d31 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -1,6 +1,7 @@
 config M68K
 	bool
 	default y
+	select ARCH_32BIT_OFF_T
 	select ARCH_MIGHT_HAVE_PC_PARPORT if ISA
 	select HAVE_IDE
 	select HAVE_AOUT if MMU
diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index 5b7a45d99cfb..c337192e3c3b 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -1,5 +1,6 @@
 config METAG
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select EMBEDDED
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 85885a501dce..643025c9f752 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -1,5 +1,6 @@
 config MICROBLAZE
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_WANT_IPC_PARSE_VERSION
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6abcef37ce06..4a50d1e6f3ee 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1,6 +1,7 @@
 config MIPS
 	bool
 	default y
+	select ARCH_32BIT_OFF_T if !64BIT
 	select ARCH_BINFMT_ELF_STATE
 	select ARCH_CLOCKSOURCE_DATA
 	select ARCH_DISCARD_MEMBLOCK
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 38e3494bfb63..75f226e6e819 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -1,5 +1,6 @@
 config MN10300
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select HAVE_EXIT_THREAD
 	select HAVE_OPROFILE
 	select HAVE_UID16
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index a72d5f0de692..c6f19d7fbfd1 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -1,5 +1,6 @@
 config NIOS2
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select CLKSRC_OF
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 1e95920b0737..5539d0842724 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -5,6 +5,7 @@
 
 config OPENRISC
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select OF
 	select OF_EARLY_FLATTREE
 	select IRQ_DOMAIN
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 531da9eb8f43..a9f430b86103 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -1,5 +1,6 @@
 config PARISC
 	def_bool y
+	select ARCH_32BIT_OFF_T if !64BIT
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select HAVE_IDE
 	select HAVE_OPROFILE
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a81460b5d6d6..4480d9c0bdb1 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -130,6 +130,7 @@ config PPC
 	#
 	# Please keep this list sorted alphabetically.
 	#
+	select ARCH_32BIT_OFF_T if PPC32
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_HAS_DMA_SET_COHERENT_MASK
 	select ARCH_HAS_ELF_RANDOMIZE
diff --git a/arch/score/Kconfig b/arch/score/Kconfig
index 507d63181389..0a9484bbddf5 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig
@@ -2,6 +2,7 @@ menu "Machine selection"
 
 config SCORE
        def_bool y
+       select ARCH_32BIT_OFF_T
        select GENERIC_IRQ_SHOW
        select GENERIC_IOMAP
        select GENERIC_ATOMIC64
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index ee086958b2b2..1f99eb3212d2 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -56,6 +56,7 @@ config SUPERH
 
 config SUPERH32
 	def_bool ARCH = "sh"
+	select ARCH_32BIT_OFF_T
 	select HAVE_KPROBES
 	select HAVE_KRETPROBES
 	select HAVE_IOREMAP_PROT if MMU && !X2TLB
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 1a83ec901446..617b7aabddeb 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -48,6 +48,7 @@ config SPARC
 
 config SPARC32
 	def_bool !64BIT
+	select ARCH_32BIT_OFF_T
 	select GENERIC_ATOMIC64
 	select CLZ_TAB
 	select HAVE_UID16
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 4583c0320059..845dcbd8235e 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -3,6 +3,7 @@
 
 config TILE
 	def_bool y
+	select ARCH_32BIT_OFF_T if !64BIT
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_WANT_FRAME_POINTERS
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 0a3bfd1fefcd..9629fd827d6b 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -1,5 +1,6 @@
 config UNICORE32
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f00fa5176f72..bd343f8a45ad 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -43,6 +43,7 @@ config X86
 	select ACPI_LEGACY_TABLES_LOOKUP	if ACPI
 	select ACPI_SYSTEM_POWER_STATES_SUPPORT	if ACPI
 	select ANON_INODES
+	select ARCH_32BIT_OFF_T			if X86_32
 	select ARCH_CLOCKSOURCE_DATA
 	select ARCH_DISCARD_MEMBLOCK
 	select ARCH_HAS_ACPI_TABLE_UPGRADE	if ACPI
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index ed56a1c4ae73..8436bcd9beba 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -21,6 +21,7 @@ config 64BIT
 config X86_32
 	def_bool !64BIT
 	select HAVE_AOUT
+	select ARCH_32BIT_OFF_T
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index f4126cf997a4..683f24e0b6a7 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -3,6 +3,7 @@ config ZONE_DMA
 
 config XTENSA
 	def_bool y
+	select ARCH_32BIT_OFF_T
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select BUILDTIME_EXTABLE_SORT
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h
index 1b48d9c9a561..297993c92490 100644
--- a/include/linux/fcntl.h
+++ b/include/linux/fcntl.h
@@ -11,7 +11,7 @@
 	 O_NOATIME | O_CLOEXEC | O_PATH | __O_TMPFILE)
 
 #ifndef force_o_largefile
-#define force_o_largefile() (BITS_PER_LONG != 32)
+#define force_o_largefile() (!IS_ENABLED(CONFIG_ARCH_32BIT_OFF_T))
 #endif
 
 #if BITS_PER_LONG == 32
-- 
2.11.0

  parent reply	other threads:[~2017-06-04 12:01 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-04 11:59 Yury Norov
2017-06-04 11:59 ` [PATCH 01/20] compat ABI: use non-compat openat and open_by_handle_at variants Yury Norov
2017-06-04 11:59 ` Yury Norov [this message]
2017-06-08 15:09   ` [PATCH 02/20] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Catalin Marinas
2017-06-13 11:04     ` Yury Norov
2017-06-14 12:31       ` Catalin Marinas
2017-06-04 11:59 ` [PATCH 03/20] asm-generic: Drop getrlimit and setrlimit syscalls from default list Yury Norov
2017-06-05 14:44   ` James Hogan
2017-06-07 18:48     ` Yury Norov
2017-06-04 11:59 ` [PATCH 04/20] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 Yury Norov
2017-06-04 11:59 ` [PATCH 05/20] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2017-06-08 14:09   ` Catalin Marinas
2017-06-08 22:40     ` Yury Norov
2017-06-09 10:59       ` Catalin Marinas
2017-06-19 15:58   ` James Morse
2017-06-20 23:10     ` Yury Norov
2017-06-22 11:45       ` Yury Norov
2017-06-04 11:59 ` [PATCH 06/20] arm64: ensure the kernel is compiled for LP64 Yury Norov
2017-06-04 11:59 ` [PATCH 07/20] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov
2017-06-04 11:59 ` [PATCH 08/20] thread: move thread bits accessors to separated file Yury Norov
2017-06-04 11:59 ` [PATCH 09/20] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2017-06-04 11:59 ` [PATCH 10/20] arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64 Yury Norov
2017-06-04 12:00 ` [PATCH 11/20] arm64: introduce binfmt_elf32.c Yury Norov
2017-06-04 12:00 ` [PATCH 12/20] arm64: ilp32: introduce binfmt_ilp32.c Yury Norov
2017-06-04 12:00 ` [PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers Yury Norov
2017-06-08 14:10   ` Catalin Marinas
2017-06-08 14:28     ` Arnd Bergmann
2017-06-04 12:00 ` [PATCH 14/20] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2017-06-08 15:05   ` James Morse
2017-06-09  7:06     ` Yury Norov
2017-06-04 12:00 ` [PATCH 15/20] arm64: signal: share lp64 signal routines to ilp32 Yury Norov
2017-06-04 12:00 ` [PATCH 16/20] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov
2017-06-19 16:16   ` James Morse
2017-06-20 14:16     ` Yury Norov
2017-06-04 12:00 ` [PATCH 17/20] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext Yury Norov
2017-06-04 12:00 ` [PATCH 18/20] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov
2017-06-23 17:03   ` James Morse
2017-06-23 22:28     ` Yury Norov
2017-06-27 10:12       ` James Morse
2017-06-04 12:00 ` [PATCH 19/20] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov
2017-06-08 15:24   ` Catalin Marinas
2017-06-08 23:06     ` Yury Norov
2017-06-04 12:00 ` [PATCH 20/20] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
2017-06-14 20:16 ` your mail Yury Norov
  -- strict thread matches above, loose matches on Subject: below --
2017-03-01 19:19 [PATCH v7 resend 00/20] ILP32 for ARM64 Yury Norov
2017-03-01 19:19 ` [PATCH 02/20] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov
2017-01-09 11:29 [PATCH v7 00/20] ILP32 for ARM64 Yury Norov
2017-01-09 11:29 ` [PATCH 02/20] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov

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