staging: lustre: llite: Replace kmem_cache_alloc with kmem_cache_zalloc

Use kmem_cache_zalloc instead of manually setting kmem_cache_alloc
with flag GFP_ZERO since kmem_alloc_zalloc sets allocated memory
to zero.

The Coccinelle semantic patch used to make this change is as
follows:
// <smpl>
@@
expression e,f;
@@
- kmem_cache_alloc(e, f |__GFP_ZERO)
+ kmem_cache_zalloc(e, f)
// </smpl>
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/llite/file.c

@@ -64,7 +64,7 @@ static struct ll_file_data *ll_file_data_get(void)
 {
 	struct ll_file_data *fd;
 
-	fd = kmem_cache_alloc(ll_file_data_slab, GFP_NOFS | __GFP_ZERO);
+	fd = kmem_cache_zalloc(ll_file_data_slab, GFP_NOFS);
 	if (!fd)
 		return NULL;
 	fd->fd_write_failed = false;
@@ -1280,7 +1280,7 @@ static int ll_lov_recreate(struct inode *inode, struct ost_id *oi, u32 ost_idx)
 	int rc = 0;
 	struct lov_stripe_md *lsm = NULL, *lsm2;
 
-	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
+	oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 	if (!oa)
 		return -ENOMEM;
 

drivers/staging/lustre/lustre/llite/llite_close.c

@@ -225,7 +225,7 @@ int ll_som_update(struct inode *inode, struct md_op_data *op_data)
 		       inode->i_ino, inode->i_generation,
 		       lli->lli_flags);
 
-	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
+	oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 	if (!oa) {
 		CERROR("can't allocate memory for Size-on-MDS update.\n");
 		return -ENOMEM;

drivers/staging/lustre/lustre/llite/llite_lib.c

@@ -1789,8 +1789,7 @@ int ll_iocontrol(struct inode *inode, struct file *file,
 			return 0;
 		}
 
-		oinfo.oi_oa = kmem_cache_alloc(obdo_cachep,
-					       GFP_NOFS | __GFP_ZERO);
+		oinfo.oi_oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 		if (!oinfo.oi_oa) {
 			ccc_inode_lsm_put(inode, lsm);
 			return -ENOMEM;

drivers/staging/lustre/lustre/llite/namei.c

@@ -887,7 +887,7 @@ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 	}
 	LASSERT(rc >= sizeof(*lsm));
 
-	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
+	oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 	if (!oa) {
 		rc = -ENOMEM;
 		goto out_free_memmd;

drivers/staging/lustre/lustre/llite/remote_perm.c

@@ -61,7 +61,7 @@ static inline struct ll_remote_perm *alloc_ll_remote_perm(void)
 {
 	struct ll_remote_perm *lrp;
 
-	lrp = kmem_cache_alloc(ll_remote_perm_cachep, GFP_KERNEL | __GFP_ZERO);
+	lrp = kmem_cache_zalloc(ll_remote_perm_cachep, GFP_KERNEL);
 	if (lrp)
 		INIT_HLIST_NODE(&lrp->lrp_list);
 	return lrp;
@@ -82,7 +82,7 @@ static struct hlist_head *alloc_rmtperm_hash(void)
 	struct hlist_head *hash;
 	int i;
 
-	hash = kmem_cache_alloc(ll_rmtperm_hash_cachep, GFP_NOFS | __GFP_ZERO);
+	hash = kmem_cache_zalloc(ll_rmtperm_hash_cachep, GFP_NOFS);
 	if (!hash)
 		return NULL;
 

drivers/staging/lustre/lustre/llite/super25.c

@@ -53,7 +53,7 @@ static struct inode *ll_alloc_inode(struct super_block *sb)
 	struct ll_inode_info *lli;
 
 	ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
-	lli = kmem_cache_alloc(ll_inode_cachep, GFP_NOFS | __GFP_ZERO);
+	lli = kmem_cache_zalloc(ll_inode_cachep, GFP_NOFS);
 	if (!lli)
 		return NULL;
 

drivers/staging/lustre/lustre/llite/vvp_dev.c

@@ -79,7 +79,7 @@ static void *vvp_key_init(const struct lu_context *ctx,
 {
 	struct vvp_thread_info *info;
 
-	info = kmem_cache_alloc(vvp_thread_kmem, GFP_NOFS | __GFP_ZERO);
+	info = kmem_cache_zalloc(vvp_thread_kmem, GFP_NOFS);
 	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
@@ -98,7 +98,7 @@ static void *vvp_session_key_init(const struct lu_context *ctx,
 {
 	struct vvp_session *session;
 
-	session = kmem_cache_alloc(vvp_session_kmem, GFP_NOFS | __GFP_ZERO);
+	session = kmem_cache_zalloc(vvp_session_kmem, GFP_NOFS);
 	if (!session)
 		session = ERR_PTR(-ENOMEM);
 	return session;

drivers/staging/lustre/lustre/llite/xattr_cache.c

@@ -114,7 +114,7 @@ static int ll_xattr_cache_add(struct list_head *cache,
 		return -EPROTO;
 	}
 
-	xattr = kmem_cache_alloc(xattr_kmem, GFP_NOFS | __GFP_ZERO);
+	xattr = kmem_cache_zalloc(xattr_kmem, GFP_NOFS);
 	if (!xattr) {
 		CDEBUG(D_CACHE, "failed to allocate xattr\n");
 		return -ENOMEM;