linux-kernel - [PATCH] lib/sg_pool,debugobjects: remove unnecessary null check when free the object

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Date:   Tue, 31 Jul 2018 23:55:19 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <tglx@...utronix.de>, <longman@...hat.com>
CC:     <yang.shi@...ux.alibaba.com>, <arnd@...db.de>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] lib/sg_pool,debugobjects: remove unnecessary null check when free the object

kmem_cache_destroy/mempool_destroy has taken null check into account.
so remove the redundant check.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 lib/debugobjects.c | 3 +--
 lib/sg_pool.c      | 7 +++----
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 994be48..7a6d80b 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -1185,8 +1185,7 @@ void __init debug_objects_mem_init(void)
 
 	if (!obj_cache || debug_objects_replace_static_objects()) {
 		debug_objects_enabled = 0;
-		if (obj_cache)
-			kmem_cache_destroy(obj_cache);
+		kmem_cache_destroy(obj_cache);
 		pr_warn("out of memory.\n");
 	} else
 		debug_objects_selftest();
diff --git a/lib/sg_pool.c b/lib/sg_pool.c
index 6dd3061..d1c1e63 100644
--- a/lib/sg_pool.c
+++ b/lib/sg_pool.c
@@ -148,10 +148,9 @@ static __init int sg_pool_init(void)
 cleanup_sdb:
 	for (i = 0; i < SG_MEMPOOL_NR; i++) {
 		struct sg_pool *sgp = sg_pools + i;
-		if (sgp->pool)
-			mempool_destroy(sgp->pool);
-		if (sgp->slab)
-			kmem_cache_destroy(sgp->slab);
+
+		mempool_destroy(sgp->pool);
+		kmem_cache_destroy(sgp->slab);
 	}
 
 	return -ENOMEM;
-- 
1.7.12.4