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authorZhihao Cheng <chengzhihao1@huawei.com>2021-05-31 15:52:10 +0300
committerRichard Weinberger <richard@nod.at>2021-06-18 23:04:47 +0300
commit819f9ab430a4478ce519e5cc8ae4de438d8ad4ba (patch)
treee166d92ee91054e6ca012ee90d9ce8b33ef4f070 /fs/ubifs
parentf4e3634a3b642225a530c292fdb1e8a4007507f5 (diff)
downloadlinux-819f9ab430a4478ce519e5cc8ae4de438d8ad4ba.tar.xz
ubifs: Remove ui_mutex in ubifs_xattr_get and change_xattr
Since ubifs_xattr_get and ubifs_xattr_set cannot being executed parallelly after importing @host_ui->xattr_sem, now we can remove ui_mutex imported by commit ab92a20bce3b4c2 ("ubifs: make ubifs_[get|set]xattr atomic"). @xattr_size, @xattr_names and @xattr_cnt can't be out of protection by @host_ui->mutex yet, they are sill accesed in other places, such as pack_inode() called by ubifs_write_inode() triggered by page-writeback. Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/xattr.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index 1fce27e9b769..e4f193eae4b2 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -208,13 +208,11 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
err = -ENOMEM;
goto out_free;
}
- mutex_lock(&ui->ui_mutex);
kfree(ui->data);
ui->data = buf;
inode->i_size = ui->ui_size = size;
old_size = ui->data_len;
ui->data_len = size;
- mutex_unlock(&ui->ui_mutex);
mutex_lock(&host_ui->ui_mutex);
host->i_ctime = current_time(host);
@@ -362,7 +360,6 @@ ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf,
ubifs_assert(c, inode->i_size == ui->data_len);
ubifs_assert(c, ubifs_inode(host)->xattr_size > ui->data_len);
- mutex_lock(&ui->ui_mutex);
if (buf) {
/* If @buf is %NULL we are supposed to return the length */
if (ui->data_len > size) {
@@ -375,7 +372,6 @@ ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf,
err = ui->data_len;
out_iput:
- mutex_unlock(&ui->ui_mutex);
iput(inode);
out_cleanup:
up_read(&ubifs_inode(host)->xattr_sem);