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authorSteven Whitehouse <swhiteho@redhat.com>2007-07-23 09:54:36 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2007-10-10 08:54:39 +0100
commit87124e581bfeaa5864662a435b6ee2a19e91b905 (patch)
treef9bc5d965834f1c7435123f26b9ab8f961c8848f /drivers/message
parentbbf25010f1a6b761914430f5fca081ec8c7accd1 (diff)
[GFS2] Fix two races relating to glock callbacks
One of the races relates to referencing a variable while not holding its protecting spinlock. The patch simply moves the test inside the spin lock. The other races occurs when a demote to unlocked request occurs during the time a demote to shared request is already running. This of course only happens in the case that the lock was in the exclusive mode to start with. The patch adds a check to see if another demote request has occurred in the mean time and if it has, then it performs a second demote. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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