[PATCH v6 22/23] powerpc32: small optimisation in flush_icache_range()
From: Christophe Leroy <hidden>
Date: 2016-02-04 10:34:39
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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 <redacted> --- v2: new v3: no change v4: no change v5: no change v6: no change arch/powerpc/kernel/misc_32.S | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 09e1e5d..3ec5a22 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
--
2.1.0