linux-sg2042/arch/x86/lib
Stephen Boyd 446f24d119 Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
The help text for this config is duplicated across the x86, parisc, and
s390 Kconfig.debug files.  Arnd Bergman noted that the help text was
slightly misleading and should be fixed to state that enabling this
option isn't a problem when using pre 4.4 gcc.

To simplify the rewording, consolidate the text into lib/Kconfig.debug
and modify it there to be more explicit about when you should say N to
this config.

Also, make the text a bit more generic by stating that this option
enables compile time checks so we can cover architectures which emit
warnings vs.  ones which emit errors.  The details of how an
architecture decided to implement the checks isn't as important as the
concept of compile time checking of copy_from_user() calls.

While we're doing this, remove all the copy_from_user_overflow() code
that's duplicated many times and place it into lib/ so that any
architecture supporting this option can get the function for free.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Helge Deller <deller@gmx.de>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-30 17:04:09 -07:00
..
.gitignore x86: Gitignore: arch/x86/lib/inat-tables.c 2009-11-04 13:11:28 +01:00
Makefile x86, 386 removal: Remove CONFIG_CMPXCHG 2012-11-29 13:23:01 -08:00
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: atomic64 assembly improvements 2012-01-20 17:29:49 -08:00
cache-smp.c x86, lib: Add wbinvd smp helpers 2010-01-22 16:05:42 -08:00
checksum_32.S x86/lib: Fix spelling, put space between a numeral and its units 2013-04-15 11:40:32 +02:00
clear_page_64.S x86, mem: clear_page_64.S: Support clear_page() with enhanced REP MOVSB/STOSB 2011-05-17 15:40:27 -07:00
cmpxchg8b_emu.S x86: Provide an alternative() based cmpxchg64() 2009-09-30 22:55:59 +02:00
cmpxchg16b_emu.S percpu: Omit segment prefix in the UP case for cmpxchg_double 2011-03-27 19:25:36 -07:00
copy_page_64.S x86/asm: Clean up copy_page_*() comments and code 2012-10-24 12:42:47 +02:00
copy_user_64.S x86, smap: Add STAC and CLAC instructions to control user space access 2012-09-21 12:45:27 -07:00
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, extable: Remove open-coded exception table entries in arch/x86/lib/csum-copy_64.S 2012-04-20 13:51:39 -07:00
csum-partial_64.c x86: Fix common misspellings 2011-03-18 10:39:30 +01:00
csum-wrappers_64.c x86: Fix kernel-doc warnings 2012-06-18 10:53:18 +02:00
delay.c X86: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -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 UAPI: x86: Fix insn_sanity build failure after UAPI split 2012-10-02 18:01:56 +01:00
iomap_copy_64.S
memcpy_32.c x86/lib: Fix spelling, put space between a numeral and its units 2013-04-15 11:40:32 +02:00
memcpy_64.S x86/lib: Fix spelling, put space between a numeral and its units 2013-04-15 11:40:32 +02:00
memmove_64.S x86/lib: Fix spelling, put space between a numeral and its units 2013-04-15 11:40:32 +02:00
memset_64.S x86-64: Fix memset() to support sizes of 4Gb and above 2012-01-26 11:50:04 +01:00
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, pvops: Remove hooks for {rd,wr}msr_safe_regs 2012-06-07 11:41:08 -07:00
msr-smp.c x86, msr: msrs_alloc/free for CONFIG_SMP=n 2009-12-16 15:36:32 -08:00
msr.c x86, msr: msrs_alloc/free for CONFIG_SMP=n 2009-12-16 15:36:32 -08:00
putuser.S x86, smap: Add STAC and CLAC instructions to control user space access 2012-09-21 12:45:27 -07:00
rwlock.S x86: Fix write lock scalability 64-bit issue 2011-07-21 09:03:36 +02:00
rwsem.S x86: Unify rwsem assembly implementation 2011-07-21 09:03:32 +02:00
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: Remove unused bits from lib/thunk_*.S 2011-02-28 18:06:22 +01:00
thunk_64.S x86: Fix write lock scalability 64-bit issue 2011-07-21 09:03:36 +02:00
usercopy.c perf/x86: Fix broken LBR fixup code 2012-06-13 15:00:28 +02:00
usercopy_32.c Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2013-04-30 17:04:09 -07:00
usercopy_64.c x86-64: Fix the failure case in copy_user_handle_tail() 2013-03-18 11:32:03 -07:00
x86-opcode-map.txt x86/decoder: Fix bsr/bsf/jmpe decoding with operand-size prefix 2012-06-06 08:54:18 +02:00