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btrfs: add helper to clear EXTENT_BUFFER_READING

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We are clearing the bit and waking up any waiters in two different
places.  Factor that code out into a static helper function.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Tavian Barnes <tavianator@tavianator.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Tavian Barnes 2024-03-18 09:56:53 -04:00 committed by David Sterba
parent c79f57eafc
commit 1e2d183709
1 changed files with 9 additions and 6 deletions
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15
fs/btrfs/extent_io.c
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@ -4260,6 +4260,13 @@ void set_extent_buffer_uptodate(struct extent_buffer *eb)
}
}
static void clear_extent_buffer_reading(struct extent_buffer *eb)
{
clear_bit(EXTENT_BUFFER_READING, &eb->bflags);
smp_mb__after_atomic();
wake_up_bit(&eb->bflags, EXTENT_BUFFER_READING);
}
static void end_bbio_meta_read(struct btrfs_bio *bbio)
{
struct extent_buffer *eb = bbio->private;
@ -4294,9 +4301,7 @@ static void end_bbio_meta_read(struct btrfs_bio *bbio)
bio_offset += len;
}
clear_bit(EXTENT_BUFFER_READING, &eb->bflags);
smp_mb__after_atomic();
wake_up_bit(&eb->bflags, EXTENT_BUFFER_READING);
clear_extent_buffer_reading(eb);
free_extent_buffer(eb);
bio_put(&bbio->bio);
@ -4330,9 +4335,7 @@ int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num,
* will now be set, and we shouldn't read it in again.
*/
if (unlikely(test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags))) {
clear_bit(EXTENT_BUFFER_READING, &eb->bflags);
smp_mb__after_atomic();
wake_up_bit(&eb->bflags, EXTENT_BUFFER_READING);
clear_extent_buffer_reading(eb);
return 0;
}