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authorDavidlohr Bueso <davidlohr.bueso@hp.com>2013-09-11 14:26:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-11 15:59:43 -0700
commit05603c44a7627793219b0bd9a7b236099dc9cd9d (patch)
tree7efa266f81f6b68861bbea6cbda6baec48267408 /ipc/util.h
parent4718787d1f626f45ddb239912bc07266b9880044 (diff)
ipc: document general ipc locking scheme
As suggested by Andrew, add a generic initial locking scheme used throughout all sysv ipc mechanisms. Documenting the ids rwsem, how rcu can be enough to do the initial checks and when to actually acquire the kern_ipc_perm.lock spinlock. I found that adding it to util.c was generic enough. Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Cc: Rik van Riel <riel@redhat.com> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/util.h')
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