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author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-15 21:55:21 (GMT) |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2012-03-16 10:27:28 (GMT) |
commit | e04268b0effc0ceea366c50b3107baad9edadafa (patch) | |
tree | 0248960f688b504d819a2cf1c11218edec962597 /include/linux/mutex-debug.h | |
parent | 7140ea1980f2fae9c7aaeac5f6b35317e1389ee6 (diff) | |
download | linux-fsl-qoriq-e04268b0effc0ceea366c50b3107baad9edadafa.tar.xz |
genirq: Remove paranoid warnons and bogus fixups
Alexander pointed out that the warnons in the regular exit path are
bogus and the thread_mask one actually could be triggered when
__setup_irq() hands out that thread_mask again after __free_irq()
dropped irq_desc->lock.
Thinking more about it, neither IRQTF_RUNTHREAD nor the bit in
thread_mask can be set as this is the regular exit path. We come here
due to:
__free_irq()
remove action from desc
synchronize_irq()
kthread_stop()
So synchronize_irq() makes sure that the thread finished running and
cleaned up both the thread_active count and thread_mask. After that
point nothing can set IRQTF_RUNTHREAD on this action. So the warnons
and the cleanups are pointless.
Reported-by: Alexander Gordeev <agordeev@redhat.com>
Cc: Ido Yariv <ido@wizery.com>
Link: http://lkml.kernel.org/r/20120315190755.GA6732@dhcp-26-207.brq.redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/mutex-debug.h')
0 files changed, 0 insertions, 0 deletions