GIT: unionfs2-2.6.27.y: Unionfs: support CONFIG_PREEMPT_RT

[Erez Zadok]

commit 86880d67b06ce04c6b0451f9242e460afe63bd03
Author: Erez_Zadok <ezk at cs.sunysb.edu>
Date:   Fri Aug 24 10:42:56 2007 -0400

    Unionfs: support CONFIG_PREEMPT_RT
    
    Use compat_rw_semaphore when using the real-time preemption patches.
    
    Signed-off-by: Erez Zadok <ezk at cs.sunysb.edu>

diff --git a/fs/unionfs/union.h b/fs/unionfs/union.h
index 3b555bc..f03143e 100644
--- a/fs/unionfs/union.h
+++ b/fs/unionfs/union.h
@@ -143,7 +143,11 @@ struct unionfs_sb_info {
 	 *   2) any new operations do not execute until the currently
 	 *      running branch management operation completes
 	 */
+#ifdef CONFIG_PREEMPT_RT
+	struct compat_rw_semaphore rwsem;
+#else /* not CONFIG_PREEMPT_RT */
 	struct rw_semaphore rwsem;
+#endif /* not CONFIG_PREEMPT_RT */
 	int high_branch_id;	/* last unique branch ID given */
 	struct unionfs_data *data;
 };