JFS: use alloc_metapage for consistency

We defind alloc_metapage, but instead of using it, the potential callers
are calling mempool_alloc directly.  Since we have and use the function,
free_metapage, we should be consistent and use alloc_metapage.

This patch also changes the argument to alloc_metapage so that the
caller passes gfp_mask directly, rather than a less descriptive flag.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

fs/jfs/jfs_metapage.c

@@ -108,9 +108,9 @@ static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
 	}
 }
 
-static inline struct metapage *alloc_metapage(int no_wait)
+static inline struct metapage *alloc_metapage(int gfp_mask)
 {
-	return mempool_alloc(metapage_mempool, no_wait ? GFP_ATOMIC : GFP_NOFS);
+	return mempool_alloc(metapage_mempool, gfp_mask);
 }
 
 static inline void free_metapage(struct metapage *mp)
@@ -289,7 +289,7 @@ struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
 		 */
 		mp = NULL;
 		if (JFS_IP(inode)->fileset == AGGREGATE_I) {
-			mp =  mempool_alloc(metapage_mempool, GFP_ATOMIC);
+			mp = alloc_metapage(GFP_ATOMIC);
 			if (!mp) {
 				/*
 				 * mempool is supposed to protect us from
@@ -306,7 +306,7 @@ struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
 			struct metapage *mp2;
 
 			spin_unlock(&meta_lock);
-			mp =  mempool_alloc(metapage_mempool, GFP_NOFS);
+			mp = alloc_metapage(GFP_NOFS);
 			spin_lock(&meta_lock);
 
 			/* we dropped the meta_lock, we need to search the