staging: lustre: lov: 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/lov/lov_dev.c

@@ -142,7 +142,7 @@ static void *lov_key_init(const struct lu_context *ctx,
 {
 	struct lov_thread_info *info;
 
-	info = kmem_cache_alloc(lov_thread_kmem, GFP_NOFS | __GFP_ZERO);
+	info = kmem_cache_zalloc(lov_thread_kmem, GFP_NOFS);
 	if (info)
 		INIT_LIST_HEAD(&info->lti_closure.clc_list);
 	else
@@ -170,7 +170,7 @@ static void *lov_session_key_init(const struct lu_context *ctx,
 {
 	struct lov_session *info;
 
-	info = kmem_cache_alloc(lov_session_kmem, GFP_NOFS | __GFP_ZERO);
+	info = kmem_cache_zalloc(lov_session_kmem, GFP_NOFS);
 	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
@@ -261,7 +261,7 @@ static int lov_req_init(const struct lu_env *env, struct cl_device *dev,
 	struct lov_req *lr;
 	int result;
 
-	lr = kmem_cache_alloc(lov_req_kmem, GFP_NOFS | __GFP_ZERO);
+	lr = kmem_cache_zalloc(lov_req_kmem, GFP_NOFS);
 	if (lr) {
 		cl_req_slice_add(req, &lr->lr_cl, dev, &lov_req_ops);
 		result = 0;

drivers/staging/lustre/lustre/lov/lov_ea.c

@@ -100,7 +100,7 @@ struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
 		return NULL;
 
 	for (i = 0; i < stripe_count; i++) {
-		loi = kmem_cache_alloc(lov_oinfo_slab, GFP_NOFS | __GFP_ZERO);
+		loi = kmem_cache_zalloc(lov_oinfo_slab, GFP_NOFS);
 		if (!loi)
 			goto err;
 		lsm->lsm_oinfo[i] = loi;

drivers/staging/lustre/lustre/lov/lov_lock.c

@@ -144,7 +144,7 @@ static struct cl_lock *lov_sublock_alloc(const struct lu_env *env,
 
 	LASSERT(idx < lck->lls_nr);
 
-	link = kmem_cache_alloc(lov_lock_link_kmem, GFP_NOFS | __GFP_ZERO);
+	link = kmem_cache_zalloc(lov_lock_link_kmem, GFP_NOFS);
 	if (link) {
 		struct lov_sublock_env *subenv;
 		struct lov_lock_sub  *lls;
@@ -1107,7 +1107,7 @@ int lov_lock_init_raid0(const struct lu_env *env, struct cl_object *obj,
 	struct lov_lock *lck;
 	int result;
 
-	lck = kmem_cache_alloc(lov_lock_kmem, GFP_NOFS | __GFP_ZERO);
+	lck = kmem_cache_zalloc(lov_lock_kmem, GFP_NOFS);
 	if (lck) {
 		cl_lock_slice_add(lock, &lck->lls_cl, obj, &lov_lock_ops);
 		result = lov_lock_sub_init(env, lck, io);
@@ -1144,7 +1144,7 @@ int lov_lock_init_empty(const struct lu_env *env, struct cl_object *obj,
 	struct lov_lock *lck;
 	int result = -ENOMEM;
 
-	lck = kmem_cache_alloc(lov_lock_kmem, GFP_NOFS | __GFP_ZERO);
+	lck = kmem_cache_zalloc(lov_lock_kmem, GFP_NOFS);
 	if (lck) {
 		cl_lock_slice_add(lock, &lck->lls_cl, obj, &lov_empty_lock_ops);
 		lck->lls_orig = lock->cll_descr;

drivers/staging/lustre/lustre/lov/lov_object.c

@@ -899,7 +899,7 @@ struct lu_object *lov_object_alloc(const struct lu_env *env,
 	struct lov_object *lov;
 	struct lu_object  *obj;
 
-	lov = kmem_cache_alloc(lov_object_kmem, GFP_NOFS | __GFP_ZERO);
+	lov = kmem_cache_zalloc(lov_object_kmem, GFP_NOFS);
 	if (lov) {
 		obj = lov2lu(lov);
 		lu_object_init(obj, NULL, dev);

drivers/staging/lustre/lustre/lov/lov_request.c

@@ -200,7 +200,7 @@ static int common_attr_done(struct lov_request_set *set)
 	if (!atomic_read(&set->set_success))
 		return -EIO;
 
-	tmp_oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
+	tmp_oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 	if (!tmp_oa) {
 		rc = -ENOMEM;
 		goto out;
@@ -307,8 +307,7 @@ int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
 		req->rq_stripe = i;
 		req->rq_idx = loi->loi_ost_idx;
 
-		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
-						    GFP_NOFS | __GFP_ZERO);
+		req->rq_oi.oi_oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
@@ -390,8 +389,7 @@ int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
 		req->rq_stripe = i;
 		req->rq_idx = loi->loi_ost_idx;
 
-		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
-						    GFP_NOFS | __GFP_ZERO);
+		req->rq_oi.oi_oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
@@ -507,8 +505,7 @@ int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
 		req->rq_stripe = i;
 		req->rq_idx = loi->loi_ost_idx;
 
-		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
-						    GFP_NOFS | __GFP_ZERO);
+		req->rq_oi.oi_oa = kmem_cache_zalloc(obdo_cachep, GFP_NOFS);
 		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;

drivers/staging/lustre/lustre/lov/lovsub_dev.c

@@ -147,7 +147,7 @@ static int lovsub_req_init(const struct lu_env *env, struct cl_device *dev,
 	struct lovsub_req *lsr;
 	int result;
 
-	lsr = kmem_cache_alloc(lovsub_req_kmem, GFP_NOFS | __GFP_ZERO);
+	lsr = kmem_cache_zalloc(lovsub_req_kmem, GFP_NOFS);
 	if (lsr) {
 		cl_req_slice_add(req, &lsr->lsrq_cl, dev, &lovsub_req_ops);
 		result = 0;

drivers/staging/lustre/lustre/lov/lovsub_lock.c

@@ -455,7 +455,7 @@ int lovsub_lock_init(const struct lu_env *env, struct cl_object *obj,
 	struct lovsub_lock *lsk;
 	int result;
 
-	lsk = kmem_cache_alloc(lovsub_lock_kmem, GFP_NOFS | __GFP_ZERO);
+	lsk = kmem_cache_zalloc(lovsub_lock_kmem, GFP_NOFS);
 	if (lsk) {
 		INIT_LIST_HEAD(&lsk->lss_parents);
 		cl_lock_slice_add(lock, &lsk->lss_cl, obj, &lovsub_lock_ops);

drivers/staging/lustre/lustre/lov/lovsub_object.c

@@ -143,7 +143,7 @@ struct lu_object *lovsub_object_alloc(const struct lu_env *env,
 	struct lovsub_object *los;
 	struct lu_object     *obj;
 
-	los = kmem_cache_alloc(lovsub_object_kmem, GFP_NOFS | __GFP_ZERO);
+	los = kmem_cache_zalloc(lovsub_object_kmem, GFP_NOFS);
 	if (los) {
 		struct cl_object_header *hdr;