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| author | Andi Kleen <ak@suse.de> | 2005-07-28 21:15:48 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-28 21:46:02 -0700 |
| commit | 3829ee6b1be03d5aa3005fe7d19f30088b539836 (patch) | |
| tree | be7a9f93c38662905509f1033ef935436d8b02a3 /arch/x86_64/kernel/entry.S | |
| parent | 3ba80e7595f3e308e5e7135445b513779fc0ba3b (diff) | |
| download | talos-obmc-linux-3829ee6b1be03d5aa3005fe7d19f30088b539836.tar.gz talos-obmc-linux-3829ee6b1be03d5aa3005fe7d19f30088b539836.zip | |
[PATCH] x86_64: Small assembly improvements
Save a byte here and there. Ultimatively useless, but these things always
catch my eyes when reading the code so just fix them for now.
Also I got at least one patch fixing of them already, which gives a good
excuse.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/entry.S')
| -rw-r--r-- | arch/x86_64/kernel/entry.S | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S index 28817490fdc6..0696e025dce5 100644 --- a/arch/x86_64/kernel/entry.S +++ b/arch/x86_64/kernel/entry.S @@ -76,7 +76,7 @@ .macro FAKE_STACK_FRAME child_rip /* push in order ss, rsp, eflags, cs, rip */ - xorq %rax, %rax + xorl %eax, %eax pushq %rax /* ss */ CFI_ADJUST_CFA_OFFSET 8 pushq %rax /* rsp */ @@ -423,7 +423,7 @@ ENTRY(stub_rt_sigreturn) testl $3,CS(%rdi) je 1f swapgs -1: addl $1,%gs:pda_irqcount # RED-PEN should check preempt count +1: incl %gs:pda_irqcount # RED-PEN should check preempt count movq %gs:pda_irqstackptr,%rax cmoveq %rax,%rsp pushq %rdi # save old stack @@ -436,7 +436,7 @@ ENTRY(common_interrupt) ret_from_intr: popq %rdi cli - subl $1,%gs:pda_irqcount + decl %gs:pda_irqcount #ifdef CONFIG_DEBUG_INFO movq RBP(%rdi),%rbp #endif @@ -494,7 +494,7 @@ retint_signal: sti SAVE_REST movq $-1,ORIG_RAX(%rsp) - xorq %rsi,%rsi # oldset + xorl %esi,%esi # oldset movq %rsp,%rdi # &pt_regs call do_notify_resume RESTORE_REST @@ -752,7 +752,7 @@ child_rip: movq %rsi, %rdi call *%rax # exit - xorq %rdi, %rdi + xorl %edi, %edi call do_exit /* |
