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Btrfs: retrurn void from clear_state_bit 

Currently it returns a set of bits that were cleared, but this return
value is not used at all.

Moreover it doesn't seem to be useful, because we may clear the bits
of a few extent_states, but only the cleared bits of last one is
returned.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
This commit is contained in:
Li Zefan 2012-03-12 16:39:28 +08:00 committed by David Sterba
parent 871383be59
commit 8e52acf704
1 changed files with 2 additions and 5 deletions
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7
fs/btrfs/extent_io.c
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@ -404,18 +404,16 @@ static int split_state(struct extent_io_tree *tree, struct extent_state *orig,
/*
* utility function to clear some bits in an extent state struct.
* it will optionally wake up any one waiting on this state (wake == 1), or
* forcibly remove the state from the tree (delete == 1).
* it will optionally wake up any one waiting on this state (wake == 1)
*
* If no bits are set on the state struct after clearing things, the
* struct is freed and removed from the tree
*/
static int clear_state_bit(struct extent_io_tree *tree,
static void clear_state_bit(struct extent_io_tree *tree,
struct extent_state *state,
int *bits, int wake)
{
int bits_to_clear = *bits & ~EXTENT_CTLBITS;
int ret = state->state & bits_to_clear;
if ((bits_to_clear & EXTENT_DIRTY) && (state->state & EXTENT_DIRTY)) {
u64 range = state->end - state->start + 1;
@ -437,7 +435,6 @@ static int clear_state_bit(struct extent_io_tree *tree,
} else {
merge_state(tree, state);
}
return ret;
}
static struct extent_state *