diff options
| author | Dominik Brodowski <[email protected]> | 2018-02-20 22:01:12 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-02-21 16:54:05 +0100 |
| commit | b2855d8d2de0fa15c1ff30c69ed7756b00c48b22 (patch) | |
| tree | 30d9adb642ba519bb162c3a1387c926d4ebf9746 | |
| parent | 3aa99fc3e708b9cd9b4cfe2df0b7a66cf293e3cf (diff) | |
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 <[email protected]>
Signed-off-by: Dominik Brodowski <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/entry/entry_64.S | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 8ea03cf94a2d..42a4b652469d 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 |