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author | Nadia Derbey <Nadia.Derbey@bull.net> | 2007-10-19 02:40:54 -0400 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-19 14:53:48 -0400 |
commit | 3e148c79938aa39035669c1cfa3ff60722134535 (patch) | |
tree | 0effb3edfece56ea38a9727ec8f4721d9a4c3ea8 /drivers/input/misc/sparcspkr.c | |
parent | f4566f04854d78acfc74b9acb029744acde9d033 (diff) |
fix idr_find() locking
This is a patch that fixes the way idr_find() used to be called in ipc_lock():
in all the paths that don't imply an update of the ipcs idr, it was called
without the idr tree being locked.
The changes are:
. in ipc_ids, the mutex has been changed into a reader/writer semaphore.
. ipc_lock() now takes the mutex as a reader during the idr_find().
. a new routine ipc_lock_down() has been defined: it doesn't take the
mutex, assuming that it is being held by the caller. This is the routine
that is now called in all the update paths.
Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Acked-by: Jarek Poplawski <jarkao2@o2.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/input/misc/sparcspkr.c')
0 files changed, 0 insertions, 0 deletions