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-rw-r--r--include/linux/exportfs.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index fe848901fcc3..3260fe714846 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -221,6 +221,8 @@ struct export_operations {
#define EXPORT_OP_NOATOMIC_ATTR (0x10) /* Filesystem cannot supply
atomic attribute updates
*/
+#define EXPORT_OP_SYNC_LOCKS (0x20) /* Filesystem can't do
+ asychronous blocking locks */
unsigned long flags;
};