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[S390] Fix parameter passing for smp_switch_to_cpu() 

After the execution has been switched to the destination CPU, the target
function is called with the wrong parameter. According to the C calling
convention on s390, the first parameter should be loaded into register 2.
Currently in smp_restart_cpu() it is stored in register 3. To fix this, we
load the parameter into the correct register 2.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2011-04-04 09:43:30 +02:00 committed by Martin Schwidefsky
parent 65a94b1417
commit 034e9e966c
2 changed files with 6 additions and 2 deletions
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4
arch/s390/kernel/switch_cpu.S
View File

@ -46,7 +46,9 @@ smp_restart_cpu:
ltr %r4,%r4 /* New stack ? */
jz 1f
lr %r15,%r4
1: basr %r14,%r2
1: lr %r14,%r2 /* r14: Function to call */
lr %r2,%r3 /* r2 : Parameter for function*/
basr %r14,%r14 /* Call function */
.gprregs_addr:
.long .gprregs

4
arch/s390/kernel/switch_cpu64.S
View File

@ -42,7 +42,9 @@ smp_restart_cpu:
ltgr %r4,%r4 /* New stack ? */
jz 1f
lgr %r15,%r4
1: basr %r14,%r2
1: lgr %r14,%r2 /* r14: Function to call */
lgr %r2,%r3 /* r2 : Parameter for function*/
basr %r14,%r14 /* Call function */
.section .data,"aw",@progbits
.gprregs: