ceph: switch some GFP_NOFS memory allocation to GFP_KERNEL

GFP_NOFS memory allocation is required for page writeback path.
But there is no need to use GFP_NOFS in syscall path and readpage
path
Signed-off-by: Yan, Zheng <zyan@redhat.com>

fs/ceph/acl.c

@@ -187,10 +187,10 @@ int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
 		val_size2 = posix_acl_xattr_size(default_acl->a_count);
 
 	err = -ENOMEM;
-	tmp_buf = kmalloc(max(val_size1, val_size2), GFP_NOFS);
+	tmp_buf = kmalloc(max(val_size1, val_size2), GFP_KERNEL);
 	if (!tmp_buf)
 		goto out_err;
-	pagelist = kmalloc(sizeof(struct ceph_pagelist), GFP_NOFS);
+	pagelist = kmalloc(sizeof(struct ceph_pagelist), GFP_KERNEL);
 	if (!pagelist)
 		goto out_err;
 	ceph_pagelist_init(pagelist);

fs/ceph/addr.c

@@ -350,7 +350,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
 
 	/* build page vector */
 	nr_pages = calc_pages_for(0, len);
-	pages = kmalloc(sizeof(*pages) * nr_pages, GFP_NOFS);
+	pages = kmalloc(sizeof(*pages) * nr_pages, GFP_KERNEL);
 	ret = -ENOMEM;
 	if (!pages)
 		goto out;
@@ -362,7 +362,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
  		dout("start_read %p adding %p idx %lu\n", inode, page,
 		     page->index);
 		if (add_to_page_cache_lru(page, &inode->i_data, page->index,
-					  GFP_NOFS)) {
+					  GFP_KERNEL)) {
 			ceph_fscache_uncache_page(inode, page);
 			page_cache_release(page);
 			dout("start_read %p add_to_page_cache failed %p\n",

fs/ceph/dir.c

@@ -38,7 +38,7 @@ int ceph_init_dentry(struct dentry *dentry)
 	if (dentry->d_fsdata)
 		return 0;
 
-	di = kmem_cache_alloc(ceph_dentry_cachep, GFP_NOFS | __GFP_ZERO);
+	di = kmem_cache_alloc(ceph_dentry_cachep, GFP_KERNEL | __GFP_ZERO);
 	if (!di)
 		return -ENOMEM;          /* oh well */
 
@@ -231,7 +231,7 @@ static int note_last_dentry(struct ceph_file_info *fi, const char *name,
 			    int len)
 {
 	kfree(fi->last_name);
-	fi->last_name = kmalloc(len+1, GFP_NOFS);
+	fi->last_name = kmalloc(len+1, GFP_KERNEL);
 	if (!fi->last_name)
 		return -ENOMEM;
 	memcpy(fi->last_name, name, len);
@@ -342,7 +342,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 		req->r_direct_hash = ceph_frag_value(frag);
 		req->r_direct_is_hash = true;
 		if (fi->last_name) {
-			req->r_path2 = kstrdup(fi->last_name, GFP_NOFS);
+			req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL);
 			if (!req->r_path2) {
 				ceph_mdsc_put_request(req);
 				return -ENOMEM;
@@ -764,7 +764,7 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry,
 		err = PTR_ERR(req);
 		goto out;
 	}
-	req->r_path2 = kstrdup(dest, GFP_NOFS);
+	req->r_path2 = kstrdup(dest, GFP_KERNEL);
 	if (!req->r_path2) {
 		err = -ENOMEM;
 		ceph_mdsc_put_request(req);
@@ -1189,7 +1189,7 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
 		return -EISDIR;
 
 	if (!cf->dir_info) {
-		cf->dir_info = kmalloc(bufsize, GFP_NOFS);
+		cf->dir_info = kmalloc(bufsize, GFP_KERNEL);
 		if (!cf->dir_info)
 			return -ENOMEM;
 		cf->dir_info_len =

fs/ceph/file.c

@@ -89,7 +89,7 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
 	case S_IFDIR:
 		dout("init_file %p %p 0%o (regular)\n", inode, file,
 		     inode->i_mode);
-		cf = kmem_cache_alloc(ceph_file_cachep, GFP_NOFS | __GFP_ZERO);
+		cf = kmem_cache_alloc(ceph_file_cachep, GFP_KERNEL | __GFP_ZERO);
 		if (cf == NULL) {
 			ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
 			return -ENOMEM;
@@ -483,7 +483,7 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *i,
 		}
 	} else {
 		num_pages = calc_pages_for(off, len);
-		pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
+		pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
 		if (IS_ERR(pages))
 			return PTR_ERR(pages);
 		ret = striped_read(inode, off, len, pages,
@@ -734,7 +734,7 @@ ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
 		 */
 		num_pages = (len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 
-		pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
+		pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
 		if (IS_ERR(pages)) {
 			ret = PTR_ERR(pages);
 			goto out;
@@ -858,7 +858,7 @@ static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
 		struct page *page = NULL;
 		loff_t i_size;
 		if (retry_op == READ_INLINE) {
-			page = __page_cache_alloc(GFP_NOFS);
+			page = __page_cache_alloc(GFP_KERNEL);
 			if (!page)
 				return -ENOMEM;
 		}

fs/ceph/mds_client.c

@@ -1668,7 +1668,8 @@ int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
 
 	order = get_order(size * num_entries);
 	while (order >= 0) {
-		rinfo->dir_in = (void*)__get_free_pages(GFP_NOFS | __GFP_NOWARN,
+		rinfo->dir_in = (void*)__get_free_pages(GFP_KERNEL |
+							__GFP_NOWARN,
 							order);
 		if (rinfo->dir_in)
 			break;