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| author | Paul Mackerras <paulus@samba.org> | 2006-08-30 08:10:47 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-08-30 08:10:47 +0200 |
| commit | 467c37801c453849a2fe243c3226476ee3985868 (patch) | |
| tree | b1e9dedf59ff9144945cb711a96274f4ca9bce62 /arch/powerpc/kernel/smp-tbsync.c | |
| parent | [POWERPC] Fix problem with time not advancing on 32-bit platforms (diff) | |
| download | linux-467c37801c453849a2fe243c3226476ee3985868.tar.xz linux-467c37801c453849a2fe243c3226476ee3985868.zip | |
[POWERPC] Fix irq enable/disable in smp_generic_take_timebase
Eran Ben-Avi <eranpublic@yahoo.com> pointed out that the arch/ppc version
of smp_generic_take_timebase disables interrupts on entry but exits without
restoring them. However, both it and the arch/powerpc version have another
problem, which is that they use local_irq_disable/enable rather than
local_irq_save/restore, and they are called with interrupts disabled.
This fixes both problems; it changes a return to a break in the arch/ppc
version, and changes both versions to use local_irq_save/restore.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/smp-tbsync.c')
| -rw-r--r-- | arch/powerpc/kernel/smp-tbsync.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/smp-tbsync.c b/arch/powerpc/kernel/smp-tbsync.c index f19e2e0e61e7..de59c6c31a5b 100644 --- a/arch/powerpc/kernel/smp-tbsync.c +++ b/arch/powerpc/kernel/smp-tbsync.c @@ -45,8 +45,9 @@ void __devinit smp_generic_take_timebase(void) { int cmd; u64 tb; + unsigned long flags; - local_irq_disable(); + local_irq_save(flags); while (!running) barrier(); rmb(); @@ -70,7 +71,7 @@ void __devinit smp_generic_take_timebase(void) set_tb(tb >> 32, tb & 0xfffffffful); enter_contest(tbsync->mark, -1); } - local_irq_enable(); + local_irq_restore(flags); } static int __devinit start_contest(int cmd, long offset, int num) |