[PATCH] use kzalloc and kcalloc in core fs code

Signed-off-by: Oliver Neukum <oliver@neukum.name>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

8 files changed, 10 insertions, 22 deletions

diff --git a/fs/aio.c b/fs/aio.c
index aec2b19..e41e932 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -122,10 +122,9 @@ static int aio_setup_ring(struct kioctx *ctx)
 	info->nr = 0;
 	info->ring_pages = info->internal_pages;
 	if (nr_pages > AIO_RING_PAGES) {
-		info->ring_pages = kmalloc(sizeof(struct page *) * nr_pages, GFP_KERNEL);
+		info->ring_pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL);
 		if (!info->ring_pages)
 			return -ENOMEM;
-		memset(info->ring_pages, 0, sizeof(struct page *) * nr_pages);
 	}
 
 	info->mmap_size = nr_pages * PAGE_SIZE;
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index c2eac2a..61c21e7 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1465,12 +1465,11 @@ static int elf_core_dump(long signr, struct pt_regs * regs, struct file * file)
 		read_lock(&tasklist_lock);
 		do_each_thread(g,p)
 			if (current->mm == p->mm && current != p) {
-				tmp = kmalloc(sizeof(*tmp), GFP_ATOMIC);
+				tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC);
 				if (!tmp) {
 					read_unlock(&tasklist_lock);
 					goto cleanup;
 				}
-				memset(tmp, 0, sizeof(*tmp));
 				INIT_LIST_HEAD(&tmp->list);
 				tmp->thread = p;
 				list_add(&tmp->list, &thread_list);
diff --git a/fs/bio.c b/fs/bio.c
index 0a8c59c..73e664c 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -636,12 +636,10 @@ static struct bio *__bio_map_user_iov(request_queue_t *q,
 		return ERR_PTR(-ENOMEM);
 
 	ret = -ENOMEM;
-	pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
+	pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL);
 	if (!pages)
 		goto out;
 
-	memset(pages, 0, nr_pages * sizeof(struct page *));
-
 	for (i = 0; i < iov_count; i++) {
 		unsigned long uaddr = (unsigned long)iov[i].iov_base;
 		unsigned long len = iov[i].iov_len;
@@ -1186,12 +1184,11 @@ void bioset_free(struct bio_set *bs)
 
 struct bio_set *bioset_create(int bio_pool_size, int bvec_pool_size, int scale)
 {
-	struct bio_set *bs = kmalloc(sizeof(*bs), GFP_KERNEL);
+	struct bio_set *bs = kzalloc(sizeof(*bs), GFP_KERNEL);
 
 	if (!bs)
 		return NULL;
 
-	memset(bs, 0, sizeof(*bs));
 	bs->bio_pool = mempool_create(bio_pool_size, mempool_alloc_slab,
 			mempool_free_slab, bio_slab);
 
diff --git a/fs/char_dev.c b/fs/char_dev.c
index 5c36345..8c6eb04 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -146,12 +146,10 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
 	int ret = 0;
 	int i;
 
-	cd = kmalloc(sizeof(struct char_device_struct), GFP_KERNEL);
+	cd = kzalloc(sizeof(struct char_device_struct), GFP_KERNEL);
 	if (cd == NULL)
 		return ERR_PTR(-ENOMEM);
 
-	memset(cd, 0, sizeof(struct char_device_struct));
-
 	mutex_lock(&chrdevs_lock);
 
 	/* temporary */
@@ -466,9 +464,8 @@ static struct kobj_type ktype_cdev_dynamic = {
 
 struct cdev *cdev_alloc(void)
 {
-	struct cdev *p = kmalloc(sizeof(struct cdev), GFP_KERNEL);
+	struct cdev *p = kzalloc(sizeof(struct cdev), GFP_KERNEL);
 	if (p) {
-		memset(p, 0, sizeof(struct cdev));
 		p->kobj.ktype = &ktype_cdev_dynamic;
 		INIT_LIST_HEAD(&p->list);
 		kobject_init(&p->kobj);
diff --git a/fs/compat.c b/fs/compat.c
index 263990a..ef5a077 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1476,10 +1476,9 @@ int compat_do_execve(char * filename,
 	int i;
 
 	retval = -ENOMEM;
-	bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
+	bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
 	if (!bprm)
 		goto out_ret;
-	memset(bprm, 0, sizeof(*bprm));
 
 	file = open_exec(filename);
 	retval = PTR_ERR(file);
diff --git a/fs/exec.c b/fs/exec.c
index d8c477a..995cba3 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1143,10 +1143,9 @@ int do_execve(char * filename,
 	int i;
 
 	retval = -ENOMEM;
-	bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
+	bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
 	if (!bprm)
 		goto out_ret;
-	memset(bprm, 0, sizeof(*bprm));
 
 	file = open_exec(filename);
 	retval = PTR_ERR(file);
diff --git a/fs/pipe.c b/fs/pipe.c
index 8aada8e..d976866 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -662,10 +662,9 @@ struct inode* pipe_new(struct inode* inode)
 {
 	struct pipe_inode_info *info;
 
-	info = kmalloc(sizeof(struct pipe_inode_info), GFP_KERNEL);
+	info = kzalloc(sizeof(struct pipe_inode_info), GFP_KERNEL);
 	if (!info)
 		goto fail_page;
-	memset(info, 0, sizeof(*info));
 	inode->i_pipe = info;
 
 	init_waitqueue_head(PIPE_WAIT(*inode));
diff --git a/fs/super.c b/fs/super.c
index 37554b8..8743e9b 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -55,11 +55,10 @@ DEFINE_SPINLOCK(sb_lock);
  */
 static struct super_block *alloc_super(void)
 {
-	struct super_block *s = kmalloc(sizeof(struct super_block),  GFP_USER);
+	struct super_block *s = kzalloc(sizeof(struct super_block),  GFP_USER);
 	static struct super_operations default_op;
 
 	if (s) {
-		memset(s, 0, sizeof(struct super_block));
 		if (security_sb_alloc(s)) {
 			kfree(s);
 			s = NULL;