All of the callers of try_lock_extent call it with gfp_t == GFP_NOFS.
This patch simplifies the call sites by calling clear_extent_bit with
GFP_NOFS from try_lock_extent itself.
Since the extent io code will probably never be used outside of a file
system, this is generally ok. If there are new callers, they can add
their own version or re-genericize it.
Signed-off-by: Jeff Mahoney <je...@suse.com>
---
fs/btrfs/extent_io.c | 22 ++++++----------------
fs/btrfs/extent_io.h | 4 ++--
fs/btrfs/relocation.c | 3 +--
3 files changed, 9 insertions(+), 20 deletions(-)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1238,28 +1238,18 @@ int lock_extent(struct extent_io_tree *t
return lock_extent_bits(tree, start, end, 0, NULL, mask);
}
-int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask)
+int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
{
int err;
u64 failed_start;
err = set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED,
- &failed_start, NULL, mask);
+ &failed_start, NULL, GFP_NOFS);
if (err == -EEXIST) {
- if (failed_start > start) {
- if (mask & __GFP_WAIT)
- clear_extent_bit(tree, start, failed_start - 1,
- EXTENT_LOCKED, 1, 0, NULL,
- mask);
- else {
- err = clear_extent_bit_atomic(tree, start,
- failed_start - 1,
- EXTENT_LOCKED, 1, 0,
- NULL, mask);
- BUG_ON(err < 0);
- }
- }
+ if (failed_start > start)
+ clear_extent_bit(tree, start, failed_start - 1,
+ EXTENT_LOCKED, 1, 0, NULL,
+ GFP_NOFS);
return 0;
}
return 1;
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -191,8 +191,8 @@ int __must_check unlock_extent_cached_at
struct extent_state **cached);
void unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached);
-int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
- gfp_t mask);
+int __must_check try_lock_extent(struct extent_io_tree *tree, u64 start,
+ u64 end);
int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
get_extent_t *get_extent, int mirror_num);
int __init extent_io_init(void);
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -1596,8 +1596,7 @@ int replace_file_extents(struct btrfs_tr
WARN_ON(!IS_ALIGNED(end, root->sectorsize));
end--;
ret = try_lock_extent(&BTRFS_I(inode)->io_tree,
- key.offset, end,
- GFP_NOFS);
+ key.offset, end);
if (!ret)
continue;
--
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