[S390] fix s390 assembler code alignments
The alignment is missing for various global symbols in s390 assembly code.
With a recent gcc and an instruction like stgrl this can lead to a
specification exception if the instruction uses such a mis-aligned address.
Specify the alignment explicitely and while add it define __ALIGN for s390
and use the ENTRY define to save some lines of code.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/switch_cpu64.S b/arch/s390/kernel/switch_cpu64.S
index 5be3f43..fcc42d7 100644
--- a/arch/s390/kernel/switch_cpu64.S
+++ b/arch/s390/kernel/switch_cpu64.S
@@ -5,6 +5,7 @@
*
*/
+#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/ptrace.h>
@@ -16,9 +17,7 @@
# %r6 - destination cpu
.section .text
- .align 4
- .globl smp_switch_to_cpu
-smp_switch_to_cpu:
+ENTRY(smp_switch_to_cpu)
stmg %r6,%r15,__SF_GPRS(%r15)
lgr %r1,%r15
aghi %r15,-STACK_FRAME_OVERHEAD
@@ -31,8 +30,7 @@
brc 2,2b /* busy, try again */
3: j 3b
- .globl smp_restart_cpu
-smp_restart_cpu:
+ENTRY(smp_restart_cpu)
larl %r1,.gprregs
lmg %r0,%r15,0(%r1)
1: sigp %r0,%r5,__SIGP_SENSE /* Wait for calling CPU */