[XFS] Create xfs_iflags_test_and_clear helper function

SGI-PV: 969608
SGI-Modid: xfs-linux-melb:xfs-kern:29496a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 79d724615c39..ea1e24effd49 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -360,6 +360,19 @@ xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
         spin_unlock(&ip->i_flags_lock);
         return ret;
 }
+
+static inline int
+xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
+{
+        int ret;
+
+        spin_lock(&ip->i_flags_lock);
+        ret = ip->i_flags & flags;
+        if (ret)
+                ip->i_flags &= ~flags;
+        spin_unlock(&ip->i_flags_lock);
+        return ret;
+}
 #endif  /* __KERNEL__ */