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authorHeiko Carstens <heiko.carstens@de.ibm.com>2016-01-31 17:06:16 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-02-23 08:56:18 +0100
commit76737ce17ab4c88f14e4452076610474108246d7 (patch)
tree59d00defd69cc30c427c5eb637553bc74e5406c8 /arch/s390/include
parent77ec8a545136272ca3056ca3759836df0cfee5e5 (diff)
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')
-rw-r--r--arch/s390/include/asm/processor.h8
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;