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staging: erofs: no need to take page lock in readdir 

VFS will take inode_lock for readdir, therefore no need to
take page lock in readdir at all just as the majority of
other generic filesystems.

Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang 2019-02-21 10:34:10 +08:00 committed by Greg Kroah-Hartman
parent 615cba3557
commit b2bb112db1
1 changed files with 0 additions and 2 deletions
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2
drivers/staging/erofs/dir.c
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@ -98,7 +98,6 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
if (IS_ERR(dentry_page))
continue;
lock_page(dentry_page);
de = (struct erofs_dirent *)kmap(dentry_page);
nameoff = le16_to_cpu(de->nameoff);
@ -128,7 +127,6 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
skip_this:
kunmap(dentry_page);
unlock_page(dentry_page);
put_page(dentry_page);
ctx->pos = blknr_to_addr(i) + ofs;