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20151169f1
linux/arch/powerpc/lib
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Paul E. McKenney 20151169f1 powerpc: Make 64-bit non-VMX __copy_tofrom_user bi-endian 
The powerpc 64-bit __copy_tofrom_user() function uses shifts to handle
unaligned invocations.  However, these shifts were designed for
big-endian systems: On little-endian systems, they must shift in the
opposite direction.

This commit relies on the C preprocessor to insert the correct shifts
into the assembly code.

[ This is a rare but nasty LE issue. Most of the time we use the POWER7
optimised __copy_tofrom_user_power7 loop, but when it hits an exception
we fall back to the base __copy_tofrom_user loop. - Anton ]

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-12-30 14:02:30 +11:00
..
alloc.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
checksum_32.S
checksum_64.S powerpc: Restore registers on error exit from csum_partial_copy_generic() 2013-10-03 17:22:42 +10:00
checksum_wrappers_64.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
code-patching.c powerpc: Don't use __put_user() in patch_instruction 2012-09-05 16:05:23 +10:00
copy_32.S
copypage_64.S powerpc: POWER7 optimised copy_page using VMX and enhanced prefetch 2012-07-03 14:14:44 +10:00
copypage_power7.S powerpc/pseries: Improve stream generation comments in copypage/user 2013-06-01 08:29:26 +10:00
copyuser_64.S powerpc: Make 64-bit non-VMX __copy_tofrom_user bi-endian 2013-12-30 14:02:30 +11:00
copyuser_power7.S powerpc: Fix endian issues in VMX copy loops 2013-10-11 16:48:25 +11:00
crtsavres.S powerpc: Put the gpr save/restore functions in their own section 2012-07-11 14:19:59 +10:00
devres.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
div64.S
feature-fixups-test.S
feature-fixups.c powerpc: Copy down exception vectors after feature fixups 2011-11-16 14:47:54 +11:00
hweight_64.S powerpc: Fix usage of register macros getting ready for %r0 change 2012-07-10 19:17:55 +10:00
ldstfp.S powerpc: Fixes for instructions not using correct register naming 2012-07-10 19:18:16 +10:00
locks.c powerpc: Fix little endian lppaca, slb_shadow and dtl_entry 2013-08-14 15:33:35 +10:00
Makefile powerpc: Add VMX optimised xor for RAID5 2013-10-30 16:02:28 +11:00
mem_64.S powerpc: Change mtcrf to use real register names 2012-07-10 19:18:11 +10:00
memcpy_64.S powerpc: Change mtcrf to use real register names 2012-07-10 19:18:11 +10:00
memcpy_power7.S powerpc: Fix endian issues in VMX copy loops 2013-10-11 16:48:25 +11:00
rheap.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
sstep.c powerpc: Fix Unaligned LE Floating Point Loads and Stores 2013-10-30 16:01:36 +11:00
string_64.S powerpc: Optimise the 64bit optimised __clear_user 2012-07-03 14:14:48 +10:00
string.S powerpc: 64bit optimised __clear_user 2012-07-03 14:14:41 +10:00
usercopy_64.c
vmx-helper.c powerpc: POWER7 optimised copy_page using VMX and enhanced prefetch 2012-07-03 14:14:44 +10:00
xor_vmx.c powerpc: Add VMX optimised xor for RAID5 2013-10-30 16:02:28 +11:00