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Subject[PATCH 30/39] block: drop null test before destroy functions
Date
Remove unneeded NULL test.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@ expression x; @@
-if (x != NULL)
\(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
block/bio-integrity.c | 7 ++-----
block/bio.c | 7 ++-----
block/blk-core.c | 3 +--
block/elevator.c | 3 +--
4 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/block/elevator.c b/block/elevator.c
index 84d6394..e3e9021 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -847,8 +847,7 @@ int elv_register(struct elevator_type *e)
spin_lock(&elv_list_lock);
if (elevator_find(e->elevator_name)) {
spin_unlock(&elv_list_lock);
- if (e->icq_cache)
- kmem_cache_destroy(e->icq_cache);
+ kmem_cache_destroy(e->icq_cache);
return -EBUSY;
}
list_add_tail(&e->list, &elv_list);
diff --git a/block/bio.c b/block/bio.c
index ad3f276..aee3290 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1850,11 +1850,8 @@ void bioset_free(struct bio_set *bs)
if (bs->rescue_workqueue)
destroy_workqueue(bs->rescue_workqueue);

- if (bs->bio_pool)
- mempool_destroy(bs->bio_pool);
-
- if (bs->bvec_pool)
- mempool_destroy(bs->bvec_pool);
+ mempool_destroy(bs->bio_pool);
+ mempool_destroy(bs->bvec_pool);

bioset_integrity_free(bs);
bio_put_slab(bs);
diff --git a/block/blk-core.c b/block/blk-core.c
index 2eb722d..7dbebd9 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -619,8 +619,7 @@ int blk_init_rl(struct request_list *rl, struct request_queue *q,

void blk_exit_rl(struct request_list *rl)
{
- if (rl->rq_pool)
- mempool_destroy(rl->rq_pool);
+ mempool_destroy(rl->rq_pool);
}

struct request_queue *blk_alloc_queue(gfp_t gfp_mask)
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 4aecca7..d3e3046 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -490,11 +490,8 @@ EXPORT_SYMBOL(bioset_integrity_create);

void bioset_integrity_free(struct bio_set *bs)
{
- if (bs->bio_integrity_pool)
- mempool_destroy(bs->bio_integrity_pool);
-
- if (bs->bvec_integrity_pool)
- mempool_destroy(bs->bvec_integrity_pool);
+ mempool_destroy(bs->bio_integrity_pool);
+ mempool_destroy(bs->bvec_integrity_pool);
}
EXPORT_SYMBOL(bioset_integrity_free);



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