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authorHeiko Carstens <heiko.carstens@de.ibm.com>2015-07-06 15:02:37 +0200
committerWilly Tarreau <w@1wt.eu>2015-09-18 13:52:16 +0200
commit13ae66d58fb92603de95f6cc8ac2e62cec3c59c4 (patch)
tree21c03a41e97ec8287ac6dbd2675d6e53b3b1cbe1
parentf85457f8be43e6fb2796d4728cc01806415acc51 (diff)
s390/process: fix sfpc inline assembly
commit e47994dd44bcb4a77b4152bd0eada585934703c0 upstream. The sfpc inline assembly within execve_tail() may incorrectly set bits 28-31 of the sfpc instruction to a value which is not zero. These bits however are currently unused and therefore should be zero so we won't get surprised if these bits will be used in the future. Therefore remove the second operand from the inline assembly. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> (cherry picked from commit b411a8a3b44d76e782ba4bc6893068f3f590fe8a) Signed-off-by: Willy Tarreau <w@1wt.eu>
-rw-r--r--arch/s390/kernel/process.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index cea285546e65..0d3448d247a9 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -261,7 +261,7 @@ asmlinkage void execve_tail(void)
{
current->thread.fp_regs.fpc = 0;
if (MACHINE_HAS_IEEE)
- asm volatile("sfpc %0,%0" : : "d" (0));
+ asm volatile("sfpc %0" : : "d" (0));
}
/*