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btrfs: unify checking of IS_ERR and null

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use IS_ERR_OR_NULL when possible, done by this coccinelle script:

@ match @
identifier id;
@@
(
- BUG_ON(IS_ERR(id) || !id);
+ BUG_ON(IS_ERR_OR_NULL(id));
|
- IS_ERR(id) || !id
+ IS_ERR_OR_NULL(id)
|
- !id || IS_ERR(id)
+ IS_ERR_OR_NULL(id)
)

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba
2011-04-19 18:00:01 +02:00
parent 4891aca2da
commit c704005d88
6 changed files with 17 additions and 17 deletions
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12
fs/btrfs/extent_io.c
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@@ -2056,7 +2056,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
}
em = get_extent(inode, page, pg_offset, cur,
end - cur + 1, 0);
if (IS_ERR(em) || !em) {
if (IS_ERR_OR_NULL(em)) {
SetPageError(page);
unlock_extent(tree, cur, end, GFP_NOFS);
break;
@@ -2341,7 +2341,7 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
}
em = epd->get_extent(inode, page, pg_offset, cur,
end - cur + 1, 1);
if (IS_ERR(em) || !em) {
if (IS_ERR_OR_NULL(em)) {
SetPageError(page);
break;
}
@@ -2769,7 +2769,7 @@ int extent_prepare_write(struct extent_io_tree *tree,
while (block_start <= block_end) {
em = get_extent(inode, page, pg_offset, block_start,
block_end - block_start + 1, 1);
if (IS_ERR(em) || !em)
if (IS_ERR_OR_NULL(em))
goto err;
cur_end = min(block_end, extent_map_end(em) - 1);
@@ -2899,7 +2899,7 @@ int try_release_extent_mapping(struct extent_map_tree *map,
len = end - start + 1;
write_lock(&map->lock);
em = lookup_extent_mapping(map, start, len);
if (!em || IS_ERR(em)) {
if (IS_ERR_OR_NULL(em)) {
write_unlock(&map->lock);
break;
}
@@ -2942,7 +2942,7 @@ sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
em = get_extent(inode, NULL, 0, start, blksize, 0);
unlock_extent_cached(&BTRFS_I(inode)->io_tree, start,
start + blksize - 1, &cached_state, GFP_NOFS);
if (!em || IS_ERR(em))
if (IS_ERR_OR_NULL(em))
return 0;
if (em->block_start > EXTENT_MAP_LAST_BYTE)
@@ -2976,7 +2976,7 @@ static struct extent_map *get_extent_skip_holes(struct inode *inode,
break;
len = (len + sectorsize - 1) & ~(sectorsize - 1);
em = get_extent(inode, NULL, 0, offset, len, 0);
if (!em || IS_ERR(em))
if (IS_ERR_OR_NULL(em))
return em;
/* if this isn't a hole return it */