Gitweb: http://git.kernel.org/linus/cf087343805ebfea2b1234b06fd5f12273e865b1
Commit: cf087343805ebfea2b1234b06fd5f12273e865b1
Parent: f55d63854e426e95d7858c2662c2353262a5af70
Author: Heiko Carstens <heiko.carstens@de.ibm.com>
AuthorDate: Wed Mar 18 13:27:34 2009 +0100
Committer: Martin Schwidefsky <schwidefsky@de.ibm.com>
CommitDate: Wed Mar 18 13:28:12 2009 +0100
[S390] ftrace/mcount: fix kernel stack backchain
With packed stack the backchain is at a different location.
Just use __SF_BACKCHAIN as an offset to store the backchain.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/kernel/mcount.S | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 397d131..8064122 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -5,6 +5,8 @@
*
*/
+#include <asm/asm-offsets.h>
+
#ifndef CONFIG_64BIT
.globl _mcount
_mcount:
@@ -14,7 +16,7 @@ _mcount:
ahi %r15,-96
l %r3,100(%r15)
la %r2,0(%r14)
- st %r1,0(%r15)
+ st %r1,__SF_BACKCHAIN(%r15)
la %r3,0(%r3)
bras %r14,0f
.long ftrace_trace_function
@@ -38,7 +40,7 @@ _mcount:
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
- stg %r1,0(%r15)
+ stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
larl %r14,ftrace_trace_function
--
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