[GFS2] Fix two races relating to glock callbacks

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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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This commit is contained in:

Steven Whitehouse 2007-07-23 09:54:36 +01:00

parent bbf25010f1

commit 87124e581b

1 changed files with 18 additions and 6 deletions

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fs/gfs2/glock.c

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