fs: xfs: Remove KM_NOSLEEP and KM_SLEEP.

Since no caller is using KM_NOSLEEP and no callee branches on KM_SLEEP,
we can remove KM_NOSLEEP and replace KM_SLEEP with 0.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_icache.c

@@ -40,7 +40,7 @@ xfs_inode_alloc(
 	 * KM_MAYFAIL and return NULL here on ENOMEM. Set the
 	 * code up to do this anyway.
 	 */
-	ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP);
+	ip = kmem_zone_alloc(xfs_inode_zone, 0);
 	if (!ip)
 		return NULL;
 	if (inode_init_always(mp->m_super, VFS_I(ip))) {