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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2012-05-09 16:27:35 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-05-16 14:42:37 +0200
commit0de9db37f0dff3bda21b3650ba60a21d3fe70df2 (patch)
tree6cfd033bebc8ae951c31294e40294ecd33262c29
parent54310a2d9e109e1cbe24e41388def33ff0391cd1 (diff)
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blackbird-op-linux-0de9db37f0dff3bda21b3650ba60a21d3fe70df2.zip
s390: initialize backchain for ext_int_handler()
To allow correct stack backtraces the backchain for the external interrupt handler is now initialized with zero like it is already done for example by io_int_handler(). Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/kernel/entry64.S1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 4e1c292fa7e3..6b5ea904e997 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -622,6 +622,7 @@ ext_skip:
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11)
TRACE_IRQS_OFF
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lghi %r1,4096
lgr %r2,%r11 # pass pointer to pt_regs
llgf %r3,__LC_EXT_CPU_ADDR # get cpu address + interruption code
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