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| author | Dave Chinner <dchinner@redhat.com> | 2010-12-04 00:02:40 +1100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2010-12-04 00:02:40 +1100 |
| commit | c8a09ff8ca2235bccdaea8a52fbd5349646a8ba4 (patch) | |
| tree | a06b4fa59672fd6fa9dd884e1e0bc746adc011b6 /fs/xfs/xfs_log_priv.h | |
| parent | 1c3cb9ec07fabf0c0970adc46fd2a1f09c1186dd (diff) | |
| download | linux-c8a09ff8ca2235bccdaea8a52fbd5349646a8ba4.tar.gz | |
xfs: convert log grant heads to atomic variables
Convert the log grant heads to atomic64_t types in preparation for converting the accounting algorithms to atomic operations. his patch just converts the variables; the algorithmic changes are in a separate patch for clarity. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_log_priv.h')
| -rw-r--r-- | fs/xfs/xfs_log_priv.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index d34af1c21ed2..7619d6a02388 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -514,8 +514,8 @@ typedef struct log { spinlock_t l_grant_lock ____cacheline_aligned_in_smp; struct list_head l_reserveq; struct list_head l_writeq; - int64_t l_grant_reserve_head; - int64_t l_grant_write_head; + atomic64_t l_grant_reserve_head; + atomic64_t l_grant_write_head; /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and @@ -596,18 +596,18 @@ xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) * will always get consistent component values to work from. */ static inline void -xlog_crack_grant_head(int64_t *head, int *cycle, int *space) +xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) { - int64_t val = *head; + int64_t val = atomic64_read(head); *cycle = val >> 32; *space = val & 0xffffffff; } static inline void -xlog_assign_grant_head(int64_t *head, int cycle, int space) +xlog_assign_grant_head(atomic64_t *head, int cycle, int space) { - *head = ((int64_t)cycle << 32) | space; + atomic64_set(head, ((int64_t)cycle << 32) | space); } /* |