diff mbox series

[v4,07/21] erofs: use meta buffers for erofs_read_superblock()

Message ID 20220307123305.79520-8-jefflexu@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series fscache,erofs: fscache-based on-demand read semantics | expand

Commit Message

Jingbo Xu March 7, 2022, 12:32 p.m. UTC 
The only change is that, meta buffers read cache page without __GFP_FS
flag, which shall not matter.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
---
 fs/erofs/super.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

Comments

Chao Yu March 11, 2022, 7:36 a.m. UTC | #1 
On 2022/3/7 20:32, Jeffle Xu wrote:
> The only change is that, meta buffers read cache page without __GFP_FS
> flag, which shall not matter.
> 
> Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,
diff mbox series

Patch

diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 915eefe0d7e2..12755217631f 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -281,21 +281,19 @@  static int erofs_init_devices(struct super_block *sb,
 static int erofs_read_superblock(struct super_block *sb)
 {
 	struct erofs_sb_info *sbi;
-	struct page *page;
+	struct erofs_buf buf = __EROFS_BUF_INITIALIZER;
 	struct erofs_super_block *dsb;
 	unsigned int blkszbits;
 	void *data;
 	int ret;
 
-	page = read_mapping_page(sb->s_bdev->bd_inode->i_mapping, 0, NULL);
-	if (IS_ERR(page)) {
+	data = erofs_read_metabuf(&buf, sb, 0, EROFS_KMAP);
+	if (IS_ERR(data)) {
 		erofs_err(sb, "cannot read erofs superblock");
-		return PTR_ERR(page);
+		return PTR_ERR(data);
 	}
 
 	sbi = EROFS_SB(sb);
-
-	data = kmap(page);
 	dsb = (struct erofs_super_block *)(data + EROFS_SUPER_OFFSET);
 
 	ret = -EINVAL;
@@ -365,8 +363,7 @@  static int erofs_read_superblock(struct super_block *sb)
 	if (erofs_sb_has_ztailpacking(sbi))
 		erofs_info(sb, "EXPERIMENTAL compressed inline data feature in use. Use at your own risk!");
 out:
-	kunmap(page);
-	put_page(page);
+	erofs_put_metabuf(&buf);
 	return ret;
 }