Commit-ID: b2855d8d2de0fa15c1ff30c69ed7756b00c48b22 Gitweb: https://git.kernel.org/tip/b2855d8d2de0fa15c1ff30c69ed7756b00c48b22 Author: Dominik Brodowski <li...@dominikbrodowski.net> AuthorDate: Tue, 20 Feb 2018 22:01:12 +0100 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Wed, 21 Feb 2018 16:54:05 +0100
x86/entry/64: Move ASM_CLAC to interrupt_entry() Moving ASM_CLAC to interrupt_entry means two instructions (addq / pushq and call interrupt_entry) are not covered by it. However, it offers a noticeable size reduction (-.2k): text data bss dec hex filename 16882 0 0 16882 41f2 entry_64.o-orig 16623 0 0 16623 40ef entry_64.o Suggested-by: Brian Gerst <brge...@gmail.com> Signed-off-by: Dominik Brodowski <li...@dominikbrodowski.net> Acked-by: Thomas Gleixner <t...@linutronix.de> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: David Woodhouse <dw...@infradead.org> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Josh Poimboeuf <jpoim...@redhat.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: dan.j.willi...@intel.com Link: http://lkml.kernel.org/r/20180220210113.6725-6-li...@dominikbrodowski.net Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/entry/entry_64.S | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 8ea03cf..42a4b65 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -572,6 +572,7 @@ END(irq_entries_start) /* 8(%rsp): ~(interrupt number) */ ENTRY(interrupt_entry) UNWIND_HINT_FUNC + ASM_CLAC cld testb $3, CS-ORIG_RAX+8(%rsp) @@ -614,7 +615,6 @@ END(interrupt_entry) */ .p2align CONFIG_X86_L1_CACHE_SHIFT common_interrupt: - ASM_CLAC addq $-0x80, (%rsp) /* Adjust vector to [-256, -1] range */ call interrupt_entry UNWIND_HINT_REGS indirect=1 @@ -811,7 +811,6 @@ END(common_interrupt) .macro apicinterrupt3 num sym do_sym ENTRY(\sym) UNWIND_HINT_IRET_REGS - ASM_CLAC pushq $~(\num) .Lcommon_\sym: call interrupt_entry
