Now that allocations that are allowed to sleep can't fail,
convert_extent_bit has no more error conditions and we can assume the
return value will be 0 and return void to callers.
Signed-off-by: Jeff Mahoney <je...@suse.com>
---
fs/btrfs/extent_io.c | 18 ++++++++++++++----
fs/btrfs/extent_io.h | 4 ++--
2 files changed, 16 insertions(+), 6 deletions(-)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1011,8 +1011,8 @@ int set_extent_bit_excl(struct extent_io
* converting from say DELALLOC to DIRTY. This is not meant to be used with
* boundary bits like LOCK.
*/
-int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
- int bits, int clear_bits, gfp_t mask)
+static int __convert_extent_bit(struct extent_io_tree *tree, u64 start,
+ u64 end, int bits, int clear_bits, gfp_t mask)
{
struct extent_state *state;
struct extent_state *prealloc = NULL;
@@ -1020,9 +1020,10 @@ int convert_extent_bit(struct extent_io_
int err = 0;
u64 last_start;
u64 last_end;
+ int wait = mask & __GFP_WAIT;
again:
- if (!prealloc && (mask & __GFP_WAIT))
+ if (!prealloc && !wait)
prealloc = alloc_extent_state_nofail(mask);
spin_lock(&tree->lock);
@@ -1176,11 +1177,20 @@ search_again:
if (start > end)
goto out;
spin_unlock(&tree->lock);
- if (mask & __GFP_WAIT)
+ if (wait)
cond_resched();
goto again;
}
+void convert_extent_bit(struct extent_io_tree *tree, u64 start,
+ u64 end, int bits, int clear_bits, gfp_t mask)
+{
+ int ret;
+ WARN_ON(!(mask & __GFP_WAIT));
+ ret = __convert_extent_bit(tree, start, end, bits, clear_bits, mask);
+ BUG_ON(ret < 0);
+}
+
/* wrappers around set/clear extent bit */
void set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end)
{
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -233,8 +233,8 @@ void set_extent_uptodate(struct extent_i
void set_extent_new(struct extent_io_tree *tree, u64 start, u64 end);
void set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end);
void clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end);
-int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
- int bits, int clear_bits, gfp_t mask);
+void convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, int clear_bits, gfp_t mask);
void set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state);
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
--
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