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b3c395ef55
linux-next/arch/x86/lib
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David Hildenbrand b3c395ef55 mm/uaccess, mm/fault: Clarify that uaccess may only sleep if pagefaults are enabled 
In general, non-atomic variants of user access functions must not sleep
if pagefaults are disabled.

Let's update all relevant comments in uaccess code. This also reflects
the might_sleep() checks in might_fault().

Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David.Laight@ACULAB.COM
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: airlied@linux.ie
Cc: akpm@linux-foundation.org
Cc: benh@kernel.crashing.org
Cc: bigeasy@linutronix.de
Cc: borntraeger@de.ibm.com
Cc: daniel.vetter@intel.com
Cc: heiko.carstens@de.ibm.com
Cc: herbert@gondor.apana.org.au
Cc: hocko@suse.cz
Cc: hughd@google.com
Cc: mst@redhat.com
Cc: paulus@samba.org
Cc: ralf@linux-mips.org
Cc: schwidefsky@de.ibm.com
Cc: yang.shi@windriver.com
Link: http://lkml.kernel.org/r/1431359540-32227-4-git-send-email-dahi@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19 08:39:14 +02:00
..
.gitignore x86: Gitignore: arch/x86/lib/inat-tables.c 2009-11-04 13:11:28 +01:00
atomic64_32.c x86: Adjust asm constraints in atomic64 wrappers 2012-01-20 17:29:31 -08:00
atomic64_386_32.S x86: atomic64 assembly improvements 2012-01-20 17:29:49 -08:00
atomic64_cx8_32.S x86/asm: Introduce push/pop macros which generate CFI_REL_OFFSET and CFI_RESTORE 2015-03-04 22:50:49 +01:00
cache-smp.c x86, lib: Add wbinvd smp helpers 2010-01-22 16:05:42 -08:00
checksum_32.S x86/asm: Optimize unnecessarily wide TEST instructions 2015-03-07 11:12:43 +01:00
clear_page_64.S x86/lib/clear_page_64.S: Convert to ALTERNATIVE_2 macro 2015-02-23 13:44:16 +01:00
cmdline.c x86, boot: Carve out early cmdline parsing function 2014-05-20 20:21:24 -07:00
cmpxchg8b_emu.S x86: Improve cmpxchg8b_emu.S 2014-10-08 10:05:49 +02:00
cmpxchg16b_emu.S x86: Improve cmpxchg16b_emu.S 2014-10-08 10:05:49 +02:00
copy_page_64.S x86/lib/copy_page_64.S: Use generic ALTERNATIVE macro 2015-02-23 13:44:12 +01:00
copy_user_64.S x86/lib/copy_user_64.S: Convert to ALTERNATIVE_2 2015-02-23 13:44:13 +01:00
copy_user_nocache_64.S x86, smap: Add STAC and CLAC instructions to control user space access 2012-09-21 12:45:27 -07:00
csum-copy_64.S x86/asm: Optimize unnecessarily wide TEST instructions 2015-03-07 11:12:43 +01:00
csum-partial_64.c x86: Fix common misspellings 2011-03-18 10:39:30 +01:00
csum-wrappers_64.c x86-64: make csum_partial_copy_from_user() error handling consistent 2014-11-16 11:00:42 -08:00
delay.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
getuser.S x86: Be consistent with data size in getuser.S 2013-02-11 23:14:48 -08:00
inat.c x86: Fix to decode grouped AVX with VEX pp bits 2012-02-11 15:11:35 +01:00
insn.c x86/asm/decoder: Fix and enforce max instruction size in the insn decoder 2015-02-19 00:01:24 +01:00
iomap_copy_64.S
Makefile net, lib: kill arch_fast_hash library bits 2014-12-10 15:17:46 -05:00
memcpy_32.c asmlinkage, x86: Fix 32bit memcpy for LTO 2014-02-13 18:14:46 -08:00
memcpy_64.S x86/lib/memcpy_64.S: Convert memcpy to ALTERNATIVE_2 macro 2015-02-23 13:55:52 +01:00
memmove_64.S x86/lib/memmove_64.S: Convert memmove() to ALTERNATIVE macro 2015-02-23 13:54:14 +01:00
memset_64.S x86/lib/memset_64.S: Convert to ALTERNATIVE_2 macro 2015-02-23 13:50:59 +01:00
misc.c x86/boot: Further compress CPUs bootup message 2013-10-01 10:52:30 +02:00
mmx_32.c x86: clean up mmx_32.c 2008-04-17 17:40:47 +02:00
msr-reg-export.c x86, pvops: Remove hooks for {rd,wr}msr_safe_regs 2012-06-07 11:41:08 -07:00
msr-reg.S x86/asm: Introduce push/pop macros which generate CFI_REL_OFFSET and CFI_RESTORE 2015-03-04 22:50:49 +01:00
msr-smp.c x86 / msr: add 64bit _on_cpu access functions 2013-10-17 00:36:06 +02:00
msr.c x86: Fix typo preventing msr_set/clear_bit from having an effect 2014-05-09 08:42:32 -07:00
putuser.S x86, smap: Add STAC and CLAC instructions to control user space access 2012-09-21 12:45:27 -07:00
rwsem.S x86/asm: Introduce push/pop macros which generate CFI_REL_OFFSET and CFI_RESTORE 2015-03-04 22:50:49 +01:00
string_32.c x86/i386: Use less assembly in strlen(), speed things up a bit 2011-12-12 18:33:42 +01:00
strstr_32.c x86: coding style fixes to arch/x86/lib/strstr_32.c 2008-08-15 16:53:24 +02:00
thunk_32.S x86/asm: Introduce push/pop macros which generate CFI_REL_OFFSET and CFI_RESTORE 2015-03-04 22:50:49 +01:00
thunk_64.S x86/asm: Introduce push/pop macros which generate CFI_REL_OFFSET and CFI_RESTORE 2015-03-04 22:50:49 +01:00
usercopy_32.c mm/uaccess, mm/fault: Clarify that uaccess may only sleep if pagefaults are enabled 2015-05-19 08:39:14 +02:00
usercopy_64.c x86: fix special __probe_kernel_write() tail zeroing case 2015-04-24 06:58:27 -07:00
usercopy.c perf: Fix arch_perf_out_copy_user default 2013-11-06 12:34:25 +01:00
x86-opcode-map.txt x86/asm/decoder: Explain CALLW discrepancy between Intel and AMD 2015-02-18 21:01:59 +01:00