On Mon, Jan 30, 2017 at 07:48:44PM +0100, Fabian Frederick wrote:
> instead of atomic_add_unless(value, -1, 0)
>
> Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
> ---
> fs/xfs/xfs_buf.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
> index ac3b4db..51b2167 100644
> --- a/fs/xfs/xfs_buf.c
> +++ b/fs/xfs/xfs_buf.c
> @@ -1684,7 +1684,7 @@ xfs_buftarg_isolate(
> * zero. If the value is already zero, we need to reclaim the
> * buffer, otherwise it gets another trip through the LRU.
> */
> - if (!atomic_add_unless(&bp->b_lru_ref, -1, 0)) {
> + if (!atomic_dec_not_zero(&bp->b_lru_ref)) {
Hard to tell if this is correct, since there's no atomic_dec_not_zero
defined in any of my kernel trees' include/ headers and I haven't seen a
patch adding such a symbol appear on this list. Did you hoist the
lib/fault-inject.c definition or something?
--D
> spin_unlock(&bp->b_lock);
> return LRU_ROTATE;
> }
> --
> 2.9.3
>
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