From: Mike Danese <mikedanese@google.com>
To: unlisted-recipients:; (no To-header on input)
Cc: kernel-janitors@vger.kernel.org,
Mike Danese <mikedanese@google.com>, Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org (open list:BLOCK LAYER),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] blk: remove NULL check before freeing functions
Date: Mon, 23 May 2016 00:13:53 -0700 [thread overview]
Message-ID: <1463987633-125741-1-git-send-email-mikedanese@google.com> (raw)
Coccinelle complains:
WARNING: NULL check before freeing functions like kfree, debugfs_remove,
debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider
reorganizing relevant code to avoid passing NULL values.
Signed-off-by: Mike Danese <mikedanese@google.com>
---
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/bio-integrity.c b/block/bio-integrity.c
index 711e4d8d..27bf4e7 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -499,11 +499,8 @@ 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);
diff --git a/block/bio.c b/block/bio.c
index 0e4aa42..e1e1773 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1844,11 +1844,8 @@ 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 2475b1c7..916e7c3 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -636,8 +636,7 @@ 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/elevator.c b/block/elevator.c
index c3555c9..5dc91ca 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);
--
2.5.0
next reply other threads:[~2016-05-23 7:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-23 7:13 Mike Danese [this message]
2016-05-23 15:20 ` Jeff Moyer
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