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x86/asm/entry/64: Get rid of int_ret_from_sys_call_fixup 

With the FIXUP_TOP_OF_STACK macro removed, this intermediate jump
is unnecessary.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1426785469-15125-5-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Denys Vlasenko 2015-03-19 18:17:49 +01:00 committed by Ingo Molnar
parent a71ffdd780
commit 65c2377486
1 changed files with 1 additions and 4 deletions
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5
arch/x86/kernel/entry_64.S
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@ -268,7 +268,7 @@ system_call_fastpath:
*/
ret_from_sys_call:
testl $_TIF_ALLWORK_MASK,TI_flags+THREAD_INFO(%rsp,SIZEOF_PTREGS)
jnz int_ret_from_sys_call_fixup /* Go the the slow path */
jnz int_ret_from_sys_call /* Go the slow path */
LOCKDEP_SYS_EXIT
DISABLE_INTERRUPTS(CLBR_NONE)
@ -293,9 +293,6 @@ ret_from_sys_call:
CFI_RESTORE_STATE
int_ret_from_sys_call_fixup:
jmp int_ret_from_sys_call
/* Do syscall entry tracing */
tracesys:
movq %rsp, %rdi