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authorChristophe Leroy <christophe.leroy@c-s.fr>2016-02-09 17:08:31 +0100
committerScott Wood <oss@buserror.net>2016-03-12 00:20:12 +0100
commit716fa91d19fb122a1392b362e85929e8385b1fd2 (patch)
treef01d18bd63dbe57393fea1983bbfaad04404e260 /arch/powerpc/kernel/misc_32.S
parentpowerpc: Simplify test in __dma_sync() (diff)
downloadlinux-716fa91d19fb122a1392b362e85929e8385b1fd2.tar.xz
linux-716fa91d19fb122a1392b362e85929e8385b1fd2.zip
powerpc32: small optimisation in flush_icache_range()
Inlining of _dcache_range() functions has shown that the compiler does the same thing a bit better with one insn less Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/kernel/misc_32.S')
-rw-r--r--arch/powerpc/kernel/misc_32.S5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 09e1e5df0f34..3ec5a2204f26 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -348,10 +348,9 @@ BEGIN_FTR_SECTION
PURGE_PREFETCHED_INS
blr /* for 601, do nothing */
END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
- li r5,L1_CACHE_BYTES-1
- andc r3,r3,r5
+ rlwinm r3,r3,0,0,31 - L1_CACHE_SHIFT
subf r4,r3,r4
- add r4,r4,r5
+ addi r4,r4,L1_CACHE_BYTES - 1
srwi. r4,r4,L1_CACHE_SHIFT
beqlr
mtctr r4