linux-kernel - [PATCH] s390, exec: remove redundant set_fs(USER

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Message-Id: <1307711428-15908-1-git-send-email-minipli@googlemail.com>
Date:	Fri, 10 Jun 2011 15:10:28 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux390@...ibm.com, linux-s390@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Mathias Krause <minipli@...glemail.com>
Subject: [PATCH] s390, exec: remove redundant set_fs(USER_DS)

The address limit is already set in flush_old_exec() so those calls to
set_fs(USER_DS) are redundant.

Signed-off-by: Mathias Krause <minipli@...glemail.com>
---
 arch/s390/include/asm/processor.h |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 1300c30..4164533 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -118,14 +118,12 @@ struct stack_frame {
  * Do necessary setup to start up a new thread.
  */
 #define start_thread(regs, new_psw, new_stackp) do {		\
-	set_fs(USER_DS);					\
 	regs->psw.mask	= psw_user_bits;			\
 	regs->psw.addr	= new_psw | PSW_ADDR_AMODE;		\
 	regs->gprs[15]	= new_stackp;				\
 } while (0)
 
 #define start_thread31(regs, new_psw, new_stackp) do {		\
-	set_fs(USER_DS);					\
 	regs->psw.mask	= psw_user32_bits;			\
 	regs->psw.addr	= new_psw | PSW_ADDR_AMODE;		\
 	regs->gprs[15]	= new_stackp;				\
-- 
1.5.6.5

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