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-rw-r--r--fs/cifs/cifsfs.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index db8a404a51dd..2829f374dbf7 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -89,6 +89,10 @@ extern mempool_t *cifs_mid_poolp;
struct workqueue_struct *cifsiod_wq;
+#ifdef CONFIG_HIGHMEM
+DEFINE_MUTEX(cifs_kmap_mutex);
+#endif
+
static int
cifs_read_super(struct super_block *sb)
{