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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-14 02:20:56 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-14 02:20:56 +0400 |
| commit | 7653fe9d6cddc3fc5e4220608079006d8ac0054c (patch) | |
| tree | 637f23e79a8956fe1a59faa62060ef369ab5f421 /fs/kernfs/file.c | |
| parent | f4b3e631b39db31f7375cce0b5e4111d14cde511 (diff) | |
| download | linux-7653fe9d6cddc3fc5e4220608079006d8ac0054c.tar.xz | |
Revert "kernfs: remove kernfs_addrm_cxt"
This reverts commit 99177a34110889a8f2c36420c34e3bcc9bfd8a70.
Tejun writes:
I'm sorry but can you please revert the whole series?
get_active() waiting while a node is deactivated has potential
to lead to deadlock and that deactivate/reactivate interface is
something fundamentally flawed and that cgroup will have to work
with the remove_self() like everybody else. IOW, I think the
first posting was correct.
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/file.c')
| -rw-r--r-- | fs/kernfs/file.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index ffe1bebf9197..404ffd2f27bc 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -817,6 +817,7 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, bool name_is_static, struct lock_class_key *key) { + struct kernfs_addrm_cxt acxt; struct kernfs_node *kn; unsigned flags; int rc; @@ -852,7 +853,14 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, if (ops->mmap) kn->flags |= KERNFS_HAS_MMAP; - rc = kernfs_add_one(kn, parent); + rc = -ENOENT; + if (kernfs_get_active(parent)) { + kernfs_addrm_start(&acxt); + rc = kernfs_add_one(&acxt, kn, parent); + kernfs_addrm_finish(&acxt); + kernfs_put_active(parent); + } + if (rc) { kernfs_put(kn); return ERR_PTR(rc); |