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Merge git://oss.sgi.com:8090/xfs/linux-2.6

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* git://oss.sgi.com:8090/xfs/linux-2.6: (45 commits)
  [XFS] Fix use after free in xfs_log_done().
  [XFS] Make xfs_bmap_*_count_leaves void.
  [XFS] Use KM_NOFS for debug trace buffers
  [XFS] use KM_MAYFAIL in xfs_mountfs
  [XFS] refactor xfs_mount_free
  [XFS] don't call xfs_freesb from xfs_unmountfs
  [XFS] xfs_unmountfs should return void
  [XFS] cleanup xfs_mountfs
  [XFS] move root inode IRELE into xfs_unmountfs
  [XFS] stop using file_update_time
  [XFS] optimize xfs_ichgtime
  [XFS] update timestamp in xfs_ialloc manually
  [XFS] remove the sema_t from XFS.
  [XFS] replace dquot flush semaphore with a completion
  [XFS] replace inode flush semaphore with a completion
  [XFS] extend completions to provide XFS object flush requirements
  [XFS] replace the XFS buf iodone semaphore with a completion
  [XFS] clean up stale references to semaphores
  [XFS] use get_unaligned_* helpers
  [XFS] Fix compile failure in xfs_buf_trace()
  ...
This commit is contained in:
Linus Torvalds 2008-08-13 15:17:49 -07:00
commit 9ea319b616
62 changed files with 884 additions and 1327 deletions
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45
include/linux/completion.h
View file

@ -55,4 +55,49 @@ extern void complete_all(struct completion *);
#define INIT_COMPLETION(x) ((x).done = 0)
/**
* try_wait_for_completion - try to decrement a completion without blocking
* @x: completion structure
*
* Returns: 0 if a decrement cannot be done without blocking
* 1 if a decrement succeeded.
*
* If a completion is being used as a counting completion,
* attempt to decrement the counter without blocking. This
* enables us to avoid waiting if the resource the completion
* is protecting is not available.
*/
static inline bool try_wait_for_completion(struct completion *x)
{
int ret = 1;
spin_lock_irq(&x->wait.lock);
if (!x->done)
ret = 0;
else
x->done--;
spin_unlock_irq(&x->wait.lock);
return ret;
}
/**
* completion_done - Test to see if a completion has any waiters
* @x: completion structure
*
* Returns: 0 if there are waiters (wait_for_completion() in progress)
* 1 if there are no waiters.
*
*/
static inline bool completion_done(struct completion *x)
{
int ret = 1;
spin_lock_irq(&x->wait.lock);
if (!x->done)
ret = 0;
spin_unlock_irq(&x->wait.lock);
return ret;
}
#endif