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| /openbmc/linux/drivers/pps/ |
| H A D | pps.c | diff 2a5cd6e2fb1984cc83f08b3645bf394830ac7825 Wed Jan 12 19:00:53 CST 2011 Alexander Gordeev <lasaine@lvk.cs.msu.su> pps: make idr lock a mutex and protect idr_pre_get
Now pps_idr_lock is never used in interrupt context so we can replace
spin_lock_irq/spin_unlock_irq with plain spin_lock/spin_unlock. But
there is also a potential race condition when someone can steal an id
which was allocated by idr_pre_get before it is used. So convert spin
lock to mutex and protect the whole id generation process.
Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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