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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-01-31 17:06:16 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-02-23 08:56:18 +0100 |
| commit | 76737ce17ab4c88f14e4452076610474108246d7 (patch) | |
| tree | 59d00defd69cc30c427c5eb637553bc74e5406c8 /arch/s390/include/asm/processor.h | |
| parent | s390/stacktrace: use nosched instead of savesched parameter (diff) | |
| download | linux-dev-76737ce17ab4c88f14e4452076610474108246d7.tar.xz linux-dev-76737ce17ab4c88f14e4452076610474108246d7.zip | |
s390: add current_stack_pointer() helper function
Implement current_stack_pointer() helper function and use it
everywhere, instead of having several different inline assembly
variants.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Tested-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 1c4fe129486d..073e18bc1676 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -203,6 +203,14 @@ unsigned long get_wchan(struct task_struct *p); /* Has task runtime instrumentation enabled ? */ #define is_ri_task(tsk) (!!(tsk)->thread.ri_cb) +static inline unsigned long current_stack_pointer(void) +{ + unsigned long sp; + + asm volatile("la %0,0(15)" : "=a" (sp)); + return sp; +} + static inline unsigned short stap(void) { unsigned short cpu_address; |