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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>
This commit is contained in:
Christophe Leroy 2016-02-09 17:08:31 +01:00 committed by Scott Wood
parent 8478d7f091
commit 716fa91d19
1 changed files with 2 additions and 3 deletions
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5
arch/powerpc/kernel/misc_32.S
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@ -348,10 +348,9 @@ BEGIN_FTR_SECTION
PURGE_PREFETCHED_INS PURGE_PREFETCHED_INS
blr /* for 601, do nothing */ blr /* for 601, do nothing */
END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
li r5,L1_CACHE_BYTES-1 rlwinm r3,r3,0,0,31 - L1_CACHE_SHIFT
andc r3,r3,r5
subf r4,r3,r4 subf r4,r3,r4
add r4,r4,r5 addi r4,r4,L1_CACHE_BYTES - 1
srwi. r4,r4,L1_CACHE_SHIFT srwi. r4,r4,L1_CACHE_SHIFT
beqlr beqlr
mtctr r4 mtctr r4