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s390: add uninitialized_var() to suppress false positive compiler warnings

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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>
This commit is contained in:
Heiko Carstens 2012-09-14 11:09:52 +02:00 committed by Martin Schwidefsky
parent 6b563d8c26
commit 41459d36cf
3 changed files with 4 additions and 4 deletions
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2
arch/s390/kernel/smp.c
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@ -126,7 +126,7 @@ static int pcpu_sigp_retry(struct pcpu *pcpu, u8 order, u32 parm)
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)

4
arch/s390/mm/pgtable.c
View File

@ -609,8 +609,8 @@ static inline unsigned int atomic_xor_bits(atomic_t *v, unsigned int bits)
*/
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))

2
drivers/s390/cio/cio.c
View File

@ -1029,7 +1029,7 @@ extern void do_reipl_asm(__u32 schid);
/* 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)