staging: lustre: osc: 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/osc/osc_cache.c

@@ -347,7 +347,7 @@ static struct osc_extent *osc_extent_alloc(struct osc_object *obj)
 {
 	struct osc_extent *ext;
 
-	ext = kmem_cache_alloc(osc_extent_kmem, GFP_NOFS | __GFP_ZERO);
+	ext = kmem_cache_zalloc(osc_extent_kmem, GFP_NOFS);
 	if (!ext)
 		return NULL;
 

drivers/staging/lustre/lustre/osc/osc_dev.c

@@ -122,7 +122,7 @@ static void *osc_key_init(const struct lu_context *ctx,
 {
 	struct osc_thread_info *info;
 
-	info = kmem_cache_alloc(osc_thread_kmem, GFP_NOFS | __GFP_ZERO);
+	info = kmem_cache_zalloc(osc_thread_kmem, GFP_NOFS);
 	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
@@ -147,7 +147,7 @@ static void *osc_session_init(const struct lu_context *ctx,
 {
 	struct osc_session *info;
 
-	info = kmem_cache_alloc(osc_session_kmem, GFP_NOFS | __GFP_ZERO);
+	info = kmem_cache_zalloc(osc_session_kmem, GFP_NOFS);
 	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;

drivers/staging/lustre/lustre/osc/osc_io.c

@@ -803,7 +803,7 @@ int osc_req_init(const struct lu_env *env, struct cl_device *dev,
 	struct osc_req *or;
 	int result;
 
-	or = kmem_cache_alloc(osc_req_kmem, GFP_NOFS | __GFP_ZERO);
+	or = kmem_cache_zalloc(osc_req_kmem, GFP_NOFS);
 	if (or) {
 		cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);
 		result = 0;

drivers/staging/lustre/lustre/osc/osc_lock.c

@@ -1567,7 +1567,7 @@ int osc_lock_init(const struct lu_env *env,
 	struct osc_lock *clk;
 	int result;
 
-	clk = kmem_cache_alloc(osc_lock_kmem, GFP_NOFS | __GFP_ZERO);
+	clk = kmem_cache_zalloc(osc_lock_kmem, GFP_NOFS);
 	if (clk) {
 		__u32 enqflags = lock->cll_descr.cld_enq_flags;
 

drivers/staging/lustre/lustre/osc/osc_object.c

@@ -255,7 +255,7 @@ struct lu_object *osc_object_alloc(const struct lu_env *env,
 	struct osc_object *osc;
 	struct lu_object *obj;
 
-	osc = kmem_cache_alloc(osc_object_kmem, GFP_NOFS | __GFP_ZERO);
+	osc = kmem_cache_zalloc(osc_object_kmem, GFP_NOFS);
 	if (osc) {
 		obj = osc2lu(osc);
 		lu_object_init(obj, NULL, dev);

drivers/staging/lustre/lustre/osc/osc_quota.c

@@ -30,7 +30,7 @@ static inline struct osc_quota_info *osc_oqi_alloc(u32 id)
 {
 	struct osc_quota_info *oqi;
 
-	oqi = kmem_cache_alloc(osc_quota_kmem, GFP_NOFS | __GFP_ZERO);
+	oqi = kmem_cache_zalloc(osc_quota_kmem, GFP_NOFS);
 	if (oqi)
 		oqi->oqi_id = id;
 

drivers/staging/lustre/lustre/osc/osc_request.c

@@ -1896,7 +1896,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 		goto out;
 	}
 
-	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
+	oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 	if (!oa) {
 		rc = -ENOMEM;
 		goto out;
@@ -2958,7 +2958,7 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 
 		CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
 		aa = ptlrpc_req_async_args(req);
-		oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
+		oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 		if (!oa) {
 			ptlrpc_req_finished(req);
 			return -ENOMEM;