s390: add uninitialized_var() to suppress false positive compiler warnings
Get rid of these:
arch/s390/kernel/smp.c:134:19: warning: ‘status’ may be used uninitialized in this function [-Wuninitialized]
arch/s390/mm/pgtable.c:641:10: warning: ‘table’ may be used uninitialized in this function [-Wuninitialized]
arch/s390/mm/pgtable.c:644:12: warning: ‘page’ may be used uninitialized in this function [-Wuninitialized]
drivers/s390/cio/cio.c:1037:14: warning: ‘schid’ may be used uninitialized in this function [-Wuninitialized]
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 8676aab..ea431e5 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -126,7 +126,7 @@
static inline int pcpu_stopped(struct pcpu *pcpu)
{
- u32 status;
+ u32 uninitialized_var(status);
if (__pcpu_sigp(pcpu->address, SIGP_SENSE,
0, &status) != SIGP_CC_STATUS_STORED)
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index d83ecbf..b402991 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -609,8 +609,8 @@
*/
unsigned long *page_table_alloc(struct mm_struct *mm, unsigned long vmaddr)
{
- struct page *page;
- unsigned long *table;
+ unsigned long *uninitialized_var(table);
+ struct page *uninitialized_var(page);
unsigned int mask, bit;
if (mm_has_pgste(mm))
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 33d1ef7..8e927b9 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -1029,7 +1029,7 @@
/* Make sure all subchannels are quiet before we re-ipl an lpar. */
void reipl_ccw_dev(struct ccw_dev_id *devid)
{
- struct subchannel_id schid;
+ struct subchannel_id uninitialized_var(schid);
s390_reset_system(NULL, NULL);
if (reipl_find_schid(devid, &schid) != 0)