diff options
| author | Denys Vlasenko <[email protected]> | 2015-04-07 22:43:40 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-04-09 10:31:25 +0200 |
| commit | 772951c4e4b06cdffeff499259dba07b544f3166 (patch) | |
| tree | 5ffbed9f27782fdd3ed95007f83db674a68d21a7 | |
| parent | 0f90fb979d7b53d80a6d5cb6e127b4b4b249907e (diff) | |
x86/asm/entry/64: Optimize [v]fork/clone stubs
Replace "call func; ret" with "jmp func".
Run-tested.
Signed-off-by: Denys Vlasenko <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Will Drewry <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 5380b3a8f3e5..ce852565443a 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -484,8 +484,7 @@ ENTRY(stub_\func) CFI_STARTPROC DEFAULT_FRAME 0, 8 /* offset 8: return address */ SAVE_EXTRA_REGS 8 - call sys_\func - ret + jmp sys_\func CFI_ENDPROC END(stub_\func) .endm |