From: Yan Burman <burman.yan@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: neilb@cse.unsw.edu.au
Subject: [PATCH 2.6.19] nfsd: replace kmalloc+memset with kcalloc + simplify NULL check
Date: Sat, 02 Dec 2006 13:08:26 +0200 [thread overview]
Message-ID: <1165057706.4523.9.camel@localhost> (raw)
Replace kmalloc+memset with kcalloc and simplify
Signed-off-by: Yan Burman <burman.yan@gmail.com>
diff -rup linux-2.6.19-rc6_orig/fs/nfsd/nfscache.c linux-2.6.19-rc6/fs/nfsd/nfscache.c
--- linux-2.6.19-rc6_orig/fs/nfsd/nfscache.c 2006-11-22 20:29:19.000000000 +0200
+++ linux-2.6.19-rc6/fs/nfsd/nfscache.c 2006-11-24 13:38:47.000000000 +0200
@@ -66,14 +66,13 @@ nfsd_cache_init(void)
printk (KERN_ERR "nfsd: cannot allocate all %d cache entries, only got %d\n",
CACHESIZE, CACHESIZE-i);
- hash_list = kmalloc (HASHSIZE * sizeof(struct hlist_head), GFP_KERNEL);
+ hash_list = kcalloc (HASHSIZE, sizeof(struct hlist_head), GFP_KERNEL);
if (!hash_list) {
nfsd_cache_shutdown();
printk (KERN_ERR "nfsd: cannot allocate %Zd bytes for hash list\n",
HASHSIZE * sizeof(struct hlist_head));
return;
}
- memset(hash_list, 0, HASHSIZE * sizeof(struct hlist_head));
cache_disabled = 0;
}
diff -rup linux-2.6.19-rc6_orig/fs/nfsd/vfs.c linux-2.6.19-rc6/fs/nfsd/vfs.c
--- linux-2.6.19-rc6_orig/fs/nfsd/vfs.c 2006-11-22 20:29:19.000000000 +0200
+++ linux-2.6.19-rc6/fs/nfsd/vfs.c 2006-11-24 13:48:31.000000000 +0200
@@ -1885,28 +1885,27 @@ nfsd_racache_init(int cache_size)
return 0;
if (cache_size < 2*RAPARM_HASH_SIZE)
cache_size = 2*RAPARM_HASH_SIZE;
- raparml = kmalloc(sizeof(struct raparms) * cache_size, GFP_KERNEL);
+ raparml = kcalloc(cache_size, sizeof(struct raparms), GFP_KERNEL);
- if (raparml != NULL) {
- dprintk("nfsd: allocating %d readahead buffers.\n",
- cache_size);
- for (i = 0 ; i < RAPARM_HASH_SIZE ; i++) {
- raparm_hash[i].pb_head = NULL;
- spin_lock_init(&raparm_hash[i].pb_lock);
- }
- nperbucket = cache_size >> RAPARM_HASH_BITS;
- memset(raparml, 0, sizeof(struct raparms) * cache_size);
- for (i = 0; i < cache_size - 1; i++) {
- if (i % nperbucket == 0)
- raparm_hash[j++].pb_head = raparml + i;
- if (i % nperbucket < nperbucket-1)
- raparml[i].p_next = raparml + i + 1;
- }
- } else {
+ if (!raparml) {
printk(KERN_WARNING
- "nfsd: Could not allocate memory read-ahead cache.\n");
+ "nfsd: Could not allocate memory read-ahead cache.\n");
return -ENOMEM;
}
+
+ dprintk("nfsd: allocating %d readahead buffers.\n", cache_size);
+ for (i = 0 ; i < RAPARM_HASH_SIZE ; i++) {
+ raparm_hash[i].pb_head = NULL;
+ spin_lock_init(&raparm_hash[i].pb_lock);
+ }
+ nperbucket = cache_size >> RAPARM_HASH_BITS;
+ for (i = 0; i < cache_size - 1; i++) {
+ if (i % nperbucket == 0)
+ raparm_hash[j++].pb_head = raparml + i;
+ if (i % nperbucket < nperbucket-1)
+ raparml[i].p_next = raparml + i + 1;
+ }
+
nfsdstats.ra_size = cache_size;
return 0;
}
reply other threads:[~2006-12-02 11:13 UTC|newest]
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