diff options
| author | Anton Blanchard <[email protected]> | 2012-06-27 13:13:52 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <[email protected]> | 2012-06-29 04:35:37 +0000 |
| commit | 0b17ba7258db83cd02da560884e053b85de371f2 (patch) | |
| tree | 970b6d210323d31f037c8593fd325636ec40a843 /lib/spinlock_debug.c | |
| parent | powerpc/ftrace: Do not trace restore_interrupts() (diff) | |
| download | kernel-0b17ba7258db83cd02da560884e053b85de371f2.tar.gz kernel-0b17ba7258db83cd02da560884e053b85de371f2.zip | |
powerpc: check_and_cede_processor() never cedes
Commit f948501b36c6 ("Make hard_irq_disable() actually hard-disable
interrupts") caused check_and_cede_processor to stop working.
->irq_happened will never be zero right after a hard_irq_disable
so the compiler removes the call to cede_processor completely.
The bug was introduced back in the lazy interrupt handling rework
of 3.4 but was hidden until recently because hard_irq_disable did
nothing.
This issue will eventually appear in 3.4 stable since the
hard_irq_disable fix is marked stable, so mark this one for stable
too.
Signed-off-by: Anton Blanchard <[email protected]>
Cc: [email protected]
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
Diffstat (limited to 'lib/spinlock_debug.c')
0 files changed, 0 insertions, 0 deletions