staging: lustre: improve some libcfs_kvzalloc calls.

Using vmalloc with GFP_NOFS is not supported as vmalloc
performs some internal allocations with GFP_KERNEL.

So in cases where the size passed to libcfs_kvzalloc()
is clearly at most 1 page, convert to kzalloc().
In cases where the call clearly doesn't hold any
filesystem locks, convert to GFP_KERNEL.

Unfortunately there are many more that are not easy to fix.
Signed-off-by: NNeilBrown <neilb@suse.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/llite/dir.c

@@ -1497,7 +1497,7 @@ static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		if (totalsize >= MDS_MAXREQSIZE / 3)
 			return -E2BIG;
 
-		hur = libcfs_kvzalloc(totalsize, GFP_NOFS);
+		hur = kzalloc(totalsize, GFP_NOFS);
 		if (!hur)
 			return -ENOMEM;
 

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

@@ -1318,7 +1318,7 @@ static int ll_lov_setea(struct inode *inode, struct file *file,
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	lump = libcfs_kvzalloc(lum_size, GFP_NOFS);
+	lump = kzalloc(lum_size, GFP_NOFS);
 	if (!lump)
 		return -ENOMEM;
 
@@ -2998,7 +2998,7 @@ static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 
 	num_bytes = sizeof(*fiemap) + (extent_count *
 				       sizeof(struct fiemap_extent));
-	fiemap = libcfs_kvzalloc(num_bytes, GFP_NOFS);
+	fiemap = kvzalloc(num_bytes, GFP_KERNEL);
 	if (!fiemap)
 		return -ENOMEM;
 

drivers/staging/lustre/lustre/obdclass/linux/linux-module.c

@@ -180,7 +180,7 @@ int obd_ioctl_getdata(char **buf, int *len, void __user *arg)
 	 * obdfilter-survey is an example, which relies on ioctl. So we'd
 	 * better avoid vmalloc on ioctl path. LU-66
 	 */
-	*buf = libcfs_kvzalloc(hdr.ioc_len, GFP_NOFS);
+	*buf = libcfs_kvzalloc(hdr.ioc_len, GFP_KERNEL);
 	if (!*buf) {
 		CERROR("Cannot allocate control buffer of len %d\n",
 		       hdr.ioc_len);

drivers/staging/lustre/lustre/obdclass/llog.c

@@ -155,7 +155,7 @@ int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
 	LASSERT(!handle->lgh_hdr);
 
 	LASSERT(chunk_size >= LLOG_MIN_CHUNK_SIZE);
-	llh = libcfs_kvzalloc(sizeof(*llh), GFP_NOFS);
+	llh = libcfs_kvzalloc(sizeof(*llh), GFP_KERNEL);
 	if (!llh)
 		return -ENOMEM;
 	handle->lgh_hdr = llh;

drivers/staging/lustre/lustre/obdclass/lustre_handles.c

@@ -185,7 +185,7 @@ int class_handle_init(void)
 	LASSERT(!handle_hash);
 
 	handle_hash = libcfs_kvzalloc(sizeof(*bucket) * HANDLE_HASH_SIZE,
-				      GFP_NOFS);
+				      GFP_KERNEL);
 	if (!handle_hash)
 		return -ENOMEM;
 

drivers/staging/lustre/lustre/ptlrpc/client.c

@@ -544,10 +544,10 @@ int ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
 		struct lustre_msg *msg;
 
 		spin_unlock(&pool->prp_lock);
-		req = ptlrpc_request_cache_alloc(GFP_NOFS);
+		req = ptlrpc_request_cache_alloc(GFP_KERNEL);
 		if (!req)
 			return i;
-		msg = libcfs_kvzalloc(size, GFP_NOFS);
+		msg = libcfs_kvzalloc(size, GFP_KERNEL);
 		if (!msg) {
 			ptlrpc_request_cache_free(req);
 			return i;