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>

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 09e1e5d..3ec5a22 100644 (file)
--- 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