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authorDave Chinner <dchinner@redhat.com>2012-04-23 15:59:05 +1000
committerBen Myers <bpm@sgi.com>2012-05-14 16:21:01 -0500
commit12bcb3f7d4371f74bd25372e98e0d2da978e82b2 (patch)
tree34179626e2d3312bd66a9b14fbb926df1fc45401 /fs/xfs/xfs_buf.c
parentad1e95c54eb3980ab2b4683fba29ad0ef954ec51 (diff)
xfs: Properly exclude IO type flags from buffer flags
Recent event tracing during a debugging session showed that flags that define the IO type for a buffer are leaking into the flags on the buffer incorrectly. Fix the flag exclusion mask in xfs_buf_alloc() to avoid problems that may be caused by such leakage. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_buf.c')
-rw-r--r--fs/xfs/xfs_buf.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index af8480d5c71..b2795bab1a0 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -178,9 +178,10 @@ xfs_buf_alloc(
return NULL;
/*
- * We don't want certain flags to appear in b_flags.
+ * We don't want certain flags to appear in b_flags unless they are
+ * specifically set by later operations on the buffer.
*/
- flags &= ~(XBF_MAPPED|XBF_READ_AHEAD);
+ flags &= ~(XBF_MAPPED | XBF_TRYLOCK | XBF_ASYNC | XBF_READ_AHEAD);
atomic_set(&bp->b_hold, 1);
atomic_set(&bp->b_lru_ref, 1);