NFS: Switch from intr mount option to TASK_KILLABLE

By using the TASK_KILLABLE infrastructure, we can get rid of the 'intr'
mount option.  We have to use _killable everywhere instead of _interruptible
as we get rid of rpc_clnt_sigmask/sigunmask.

Signed-off-by: Liam R. Howlett <howlett@gmail.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
diff --git a/include/linux/nfs_mount.h b/include/linux/nfs_mount.h
index a3ade89..df7c6b7 100644
--- a/include/linux/nfs_mount.h
+++ b/include/linux/nfs_mount.h
@@ -48,7 +48,7 @@
 /* bits in the flags field */
 
 #define NFS_MOUNT_SOFT		0x0001	/* 1 */
-#define NFS_MOUNT_INTR		0x0002	/* 1 */
+#define NFS_MOUNT_INTR		0x0002	/* 1 */ /* now unused, but ABI */
 #define NFS_MOUNT_SECURE	0x0004	/* 1 */
 #define NFS_MOUNT_POSIX		0x0008	/* 1 */
 #define NFS_MOUNT_NOCTO		0x0010	/* 1 */