tree 5d8fbefb9caa76e73a8077217242883dd74a6945
parent fa0708b320f6da4c1104fe56e01b7abf66fd16ad
author Shengjiu Wang <shengjiu.wang@freescale.com> 1449578239 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1450180302 +0000

ARM: 8475/1: SWP emulation: Restore original *data when failed

__user_swpX_asm maybe failed in first STREX operation, emulate_swpX
will try again, but the *data has been changed in first time. which
causes the result is wrong.
This patch is to fix this issue. When STREX succeed, change the *data.
if it fail, *data is not changed.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>