linux-kernel - [tip:x86/asm] x86/asm/entry/64: Get rid of int_ret_from_sys_call

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Message-ID: <tip-65c2377486c0b68f149f7d8770499a86b15786b6@git.kernel.org>
Date:	Wed, 25 Mar 2015 02:11:35 -0700
From:	tip-bot for Denys Vlasenko <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...nel.org, dvlasenk@...hat.com,
	linux-kernel@...r.kernel.org, keescook@...omium.org,
	ast@...mgrid.com, tglx@...utronix.de, hpa@...or.com,
	luto@...nel.org, wad@...omium.org, bp@...e.de, oleg@...hat.com,
	fweisbec@...il.com, luto@...capital.net, bp@...en8.de,
	rostedt@...dmis.org, torvalds@...ux-foundation.org
Subject: [tip:x86/asm] x86/asm/entry/64:
  Get rid of int_ret_from_sys_call_fixup

Commit-ID:  65c2377486c0b68f149f7d8770499a86b15786b6
Gitweb:     http://git.kernel.org/tip/65c2377486c0b68f149f7d8770499a86b15786b6
Author:     Denys Vlasenko <dvlasenk@...hat.com>
AuthorDate: Thu, 19 Mar 2015 18:17:49 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 24 Mar 2015 19:42:38 +0100

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@...hat.com>
Acked-by: Borislav Petkov <bp@...e.de>
Acked-by: Andy Lutomirski <luto@...nel.org>
Cc: Alexei Starovoitov <ast@...mgrid.com>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Will Drewry <wad@...omium.org>
Link: http://lkml.kernel.org/r/1426785469-15125-5-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/entry_64.S | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 3f8daba..df04ee06 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -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
--
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