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authorHeiko Carstens <heiko.carstens@de.ibm.com>2006-07-03 00:24:46 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 15:27:03 -0700
commit1f194a4c393103ac925001d7e04b05fbb122580d (patch)
tree9185dd3ecc6a03f6bc8a15d330c862b86ad23730 /drivers/s390/char/sclp.c
parent6375e2b74c620794e1a27a26e4338aec2e41346a (diff)
downloadlinux-linaro-stable-1f194a4c393103ac925001d7e04b05fbb122580d.tar.gz
[PATCH] lockdep: irqtrace subsystem, s390 support
irqtrace support for s390. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/char/sclp.c')
-rw-r--r--drivers/s390/char/sclp.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index 4138564402b8..985d1613baaa 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -383,6 +383,7 @@ void
sclp_sync_wait(void)
{
unsigned long psw_mask;
+ unsigned long flags;
unsigned long cr0, cr0_sync;
u64 timeout;
@@ -395,9 +396,11 @@ sclp_sync_wait(void)
sclp_tod_from_jiffies(sclp_request_timer.expires -
jiffies);
}
+ local_irq_save(flags);
/* Prevent bottom half from executing once we force interrupts open */
local_bh_disable();
/* Enable service-signal interruption, disable timer interrupts */
+ trace_hardirqs_on();
__ctl_store(cr0, 0, 0);
cr0_sync = cr0;
cr0_sync |= 0x00000200;
@@ -415,11 +418,10 @@ sclp_sync_wait(void)
barrier();
cpu_relax();
}
- /* Restore interrupt settings */
- asm volatile ("SSM 0(%0)"
- : : "a" (&psw_mask) : "memory");
+ local_irq_disable();
__ctl_load(cr0, 0, 0);
- __local_bh_enable();
+ _local_bh_enable();
+ local_irq_restore(flags);
}
EXPORT_SYMBOL(sclp_sync_wait);