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Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull misc vfs updates from Al Viro:
 "Assorted stuff"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  perf_event_get(): don't bother with fget_raw()
  vfs: update d_make_root() description
This commit is contained in:
Linus Torvalds 2019-07-19 11:35:08 -07:00
commit 4f5ed1318c
2 changed files with 14 additions and 5 deletions
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15
Documentation/filesystems/porting
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@ -428,8 +428,19 @@ release it yourself.
-- --
[mandatory] [mandatory]
d_alloc_root() is gone, along with a lot of bugs caused by code d_alloc_root() is gone, along with a lot of bugs caused by code
misusing it. Replacement: d_make_root(inode). The difference is, misusing it. Replacement: d_make_root(inode). On success d_make_root(inode)
d_make_root() drops the reference to inode if dentry allocation fails. allocates and returns a new dentry instantiated with the passed in inode.
On failure NULL is returned and the passed in inode is dropped so the reference
to inode is consumed in all cases and failure handling need not do any cleanup
for the inode. If d_make_root(inode) is passed a NULL inode it returns NULL
and also requires no further error handling. Typical usage is:
inode = foofs_new_inode(....);
s->s_root = d_make_inode(inode);
if (!s->s_root)
/* Nothing needed for the inode cleanup */
return -ENOMEM;
...
-- --
[mandatory] [mandatory]

4
kernel/events/core.c
View File

@ -11618,9 +11618,7 @@ void perf_event_delayed_put(struct task_struct *task)
struct file *perf_event_get(unsigned int fd) struct file *perf_event_get(unsigned int fd)
{ {
struct file *file; struct file *file = fget(fd);
file = fget_raw(fd);
if (!file) if (!file)
return ERR_PTR(-EBADF); return ERR_PTR(-EBADF);