Commit-ID: 426932909093e4e7729777a0e2beed4b54911361 Gitweb: http://git.kernel.org/tip/426932909093e4e7729777a0e2beed4b54911361 Author: Jan Beulich <JBeulich@xxxxxxxx> AuthorDate: Thu, 5 Jan 2012 16:12:25 +0000 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Fri, 6 Jan 2012 12:25:37 +0100 x86-64: Slightly shorten copy_page() %r13 got saved and restored without ever getting touched, so there's no need to do so. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/4F05D9F9020000780006AA0D@xxxxxxxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- arch/x86/lib/copy_page_64.S | 12 ++++-------- 1 files changed, 4 insertions(+), 8 deletions(-) diff --git a/arch/x86/lib/copy_page_64.S b/arch/x86/lib/copy_page_64.S index 01c805b..6b34d04 100644 --- a/arch/x86/lib/copy_page_64.S +++ b/arch/x86/lib/copy_page_64.S @@ -20,14 +20,12 @@ ENDPROC(copy_page_c) ENTRY(copy_page) CFI_STARTPROC - subq $3*8,%rsp - CFI_ADJUST_CFA_OFFSET 3*8 + subq $2*8,%rsp + CFI_ADJUST_CFA_OFFSET 2*8 movq %rbx,(%rsp) CFI_REL_OFFSET rbx, 0 movq %r12,1*8(%rsp) CFI_REL_OFFSET r12, 1*8 - movq %r13,2*8(%rsp) - CFI_REL_OFFSET r13, 2*8 movl $(4096/64)-5,%ecx .p2align 4 @@ -91,10 +89,8 @@ ENTRY(copy_page) CFI_RESTORE rbx movq 1*8(%rsp),%r12 CFI_RESTORE r12 - movq 2*8(%rsp),%r13 - CFI_RESTORE r13 - addq $3*8,%rsp - CFI_ADJUST_CFA_OFFSET -3*8 + addq $2*8,%rsp + CFI_ADJUST_CFA_OFFSET -2*8 ret .Lcopy_page_end: CFI_ENDPROC -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|