a7y18lte-ubports/android_kernel_samsung_universal7885
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x86: drop -funroll-loops for csum_partial_64.c

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Impact: performance optimization

I did some rebenchmarking with modern compilers and dropping
-funroll-loops makes the function consistently go faster by a few
percent.  So drop that flag.

Thanks to Richard Guenther for a hint.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Andi Kleen 2008-09-04 13:46:11 +02:00 committed by H. Peter Anvin
parent a5444d15b6
commit fb481dd56a
1 changed files with 0 additions and 3 deletions
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arch/x86/lib/Makefile
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@ -17,9 +17,6 @@ ifeq ($(CONFIG_X86_32),y)
lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o
else else
obj-y += io_64.o iomap_copy_64.o obj-y += io_64.o iomap_copy_64.o
CFLAGS_csum-partial_64.o := -funroll-loops
lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o
lib-y += thunk_64.o clear_page_64.o copy_page_64.o lib-y += thunk_64.o clear_page_64.o copy_page_64.o
lib-y += memmove_64.o memset_64.o lib-y += memmove_64.o memset_64.o