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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 13:13:57 +08:00
linux-next/arch/powerpc
Anton Blanchard 8eb9803723 powerpc: Avoid load hit store in __giveup_fpu() and __giveup_altivec()
In both __giveup_fpu() and __giveup_altivec() we make two modifications
to tsk->thread.regs->msr. gcc decides to do a read/modify/write of
each change, so we end up with a load hit store:

        ld      r9,264(r10)
        rldicl  r9,r9,50,1
        rotldi  r9,r9,14
        std     r9,264(r10)
...
        ld      r9,264(r10)
        rldicl  r9,r9,40,1
        rotldi  r9,r9,24
        std     r9,264(r10)

Fix this by using a temporary.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-06-14 13:58:25 +10:00
..
boot Merge branch 'for-4.7-dw' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-05-23 18:19:21 -07:00
configs powerpc updates for 4.6 2016-03-19 15:38:41 -07:00
crypto powerpc updates for 4.6 2016-03-19 15:38:41 -07:00
include powerpc/nohash: Fix build break with 64K pages 2016-06-10 13:24:56 +10:00
kernel powerpc: Avoid load hit store in __giveup_fpu() and __giveup_altivec() 2016-06-14 13:58:25 +10:00
kvm powerpc updates for 4.7 2016-05-20 10:12:41 -07:00
lib powerpc/sstep: Fix emulation fall-through 2016-05-11 21:54:08 +10:00
math-emu
mm powerpc/mm/hash: Compute the segment size correctly for ISA 3.0 2016-06-08 14:36:22 +10:00
net net: filter: make JITs zero A for SKF_AD_ALU_XOR_X 2016-01-06 00:43:52 -05:00
oprofile powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
perf Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-05-25 17:05:40 -07:00
platforms powerpc fixes for 4.7 #2 2016-06-10 12:23:49 -07:00
scripts powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel 2016-03-07 14:53:56 +11:00
sysdev DAX error handling for 4.7 2016-05-26 19:34:26 -07:00
xmon powerpc/xmon: Fix SPR read/write commands and add command to dump SPRs 2016-05-11 21:54:07 +10:00
Kconfig printk/nmi: generic solution for safe printk in NMI 2016-05-20 17:58:30 -07:00
Kconfig.debug powerpc/mm: Always use STRICT_MM_TYPECHECKS 2016-05-01 18:32:14 +10:00
Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next 2016-03-14 20:05:14 +11:00
relocs_check.sh powerpc: Convert relocs_check to a shell script using grep 2015-03-23 14:47:39 +11:00