btrfs: drop gfp parameter from alloc_extent_map

pass GFP_NOFS directly to kmem_cache_alloc
Signed-off-by: NDavid Sterba <dsterba@suse.cz>

fs/btrfs/disk-io.c

@@ -154,7 +154,7 @@ static struct extent_map *btree_get_extent(struct inode *inode,
 	}
 	read_unlock(&em_tree->lock);
 
-	em = alloc_extent_map(GFP_NOFS);
+	em = alloc_extent_map();
 	if (!em) {
 		em = ERR_PTR(-ENOMEM);
 		goto out;

fs/btrfs/extent-tree.c

@@ -6694,7 +6694,7 @@ static noinline int relocate_data_extent(struct inode *reloc_inode,
 	u64 start = extent_key->objectid - offset;
 	u64 end = start + extent_key->offset - 1;
 
-	em = alloc_extent_map(GFP_NOFS);
+	em = alloc_extent_map();
 	BUG_ON(!em);
 
 	em->start = start;

fs/btrfs/extent_map.c

@@ -40,16 +40,15 @@ void extent_map_tree_init(struct extent_map_tree *tree)
 
 /**
  * alloc_extent_map - allocate new extent map structure
- * @mask:	memory allocation flags
  *
  * Allocate a new extent_map structure.  The new structure is
  * returned with a reference count of one and needs to be
  * freed using free_extent_map()
  */
-struct extent_map *alloc_extent_map(gfp_t mask)
+struct extent_map *alloc_extent_map(void)
 {
 	struct extent_map *em;
-	em = kmem_cache_alloc(extent_map_cache, mask);
+	em = kmem_cache_alloc(extent_map_cache, GFP_NOFS);
 	if (!em)
 		return NULL;
 	em->in_tree = 0;

fs/btrfs/extent_map.h

@@ -56,7 +56,7 @@ int add_extent_mapping(struct extent_map_tree *tree,
 		       struct extent_map *em);
 int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
 
-struct extent_map *alloc_extent_map(gfp_t mask);
+struct extent_map *alloc_extent_map(void);
 void free_extent_map(struct extent_map *em);
 int __init extent_map_init(void);
 void extent_map_exit(void);

fs/btrfs/file.c

@@ -191,9 +191,9 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
 	}
 	while (1) {
 		if (!split)
-			split = alloc_extent_map(GFP_NOFS);
+			split = alloc_extent_map();
 		if (!split2)
-			split2 = alloc_extent_map(GFP_NOFS);
+			split2 = alloc_extent_map();
 		BUG_ON(!split || !split2);
 
 		write_lock(&em_tree->lock);

fs/btrfs/inode.c

@@ -649,7 +649,7 @@ static noinline int submit_compressed_extents(struct inode *inode,
 					async_extent->start +
 					async_extent->ram_size - 1, 0);
 
-		em = alloc_extent_map(GFP_NOFS);
+		em = alloc_extent_map();
 		BUG_ON(!em);
 		em->start = async_extent->start;
 		em->len = async_extent->ram_size;
@@ -826,7 +826,7 @@ static noinline int cow_file_range(struct inode *inode,
 					   (u64)-1, &ins, 1);
 		BUG_ON(ret);
 
-		em = alloc_extent_map(GFP_NOFS);
+		em = alloc_extent_map();
 		BUG_ON(!em);
 		em->start = start;
 		em->orig_start = em->start;
@@ -1177,7 +1177,7 @@ static noinline int run_delalloc_nocow(struct inode *inode,
 			struct extent_map *em;
 			struct extent_map_tree *em_tree;
 			em_tree = &BTRFS_I(inode)->extent_tree;
-			em = alloc_extent_map(GFP_NOFS);
+			em = alloc_extent_map();
 			BUG_ON(!em);
 			em->start = cur_offset;
 			em->orig_start = em->start;
@@ -5069,7 +5069,7 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
 		else
 			goto out;
 	}
-	em = alloc_extent_map(GFP_NOFS);
+	em = alloc_extent_map();
 	if (!em) {
 		err = -ENOMEM;
 		goto out;
@@ -5382,7 +5382,7 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag
 		u64 hole_start = start;
 		u64 hole_len = len;
 
-		em = alloc_extent_map(GFP_NOFS);
+		em = alloc_extent_map();
 		if (!em) {
 			err = -ENOMEM;
 			goto out;
@@ -5483,7 +5483,7 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode,
 	}
 
 	if (!em) {
-		em = alloc_extent_map(GFP_NOFS);
+		em = alloc_extent_map();
 		if (!em) {
 			em = ERR_PTR(-ENOMEM);
 			goto out;

fs/btrfs/relocation.c

@@ -2870,7 +2870,7 @@ int setup_extent_mapping(struct inode *inode, u64 start, u64 end,
 	struct extent_map *em;
 	int ret = 0;
 
-	em = alloc_extent_map(GFP_NOFS);
+	em = alloc_extent_map();
 	if (!em)
 		return -ENOMEM;
 

fs/btrfs/volumes.c

@@ -2609,7 +2609,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 
 	trace_btrfs_chunk_alloc(info->chunk_root, map, start, *num_bytes);
 
-	em = alloc_extent_map(GFP_NOFS);
+	em = alloc_extent_map();
 	if (!em) {
 		ret = -ENOMEM;
 		goto error;
@@ -3499,7 +3499,7 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
 		free_extent_map(em);
 	}
 
-	em = alloc_extent_map(GFP_NOFS);
+	em = alloc_extent_map();
 	if (!em)
 		return -ENOMEM;
 	num_stripes = btrfs_chunk_num_stripes(leaf, chunk);