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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-14 14:58:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-14 14:58:32 -0700 |
| commit | 2f6c6d0891b472bbda70dfcc51fbb3147b6f54a0 (patch) | |
| tree | b85824f24a5af8848f246bf1369982388ff12a06 | |
| parent | 09cad07547445bf3a41683e4d3abcd154c123ef5 (diff) | |
| parent | 65026da59cda16baf6c3e98b74ec439f366e468f (diff) | |
| download | linux-2f6c6d0891b472bbda70dfcc51fbb3147b6f54a0.tar.bz2 | |
Merge branch 'for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
"Two minor changes.
One makes cgroup interface files ignore zero-sized writes rather than
triggering -EINVAL on them. The other change is a cleanup which
doesn't cause any behavior changes"
* 'for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: Zero sized write should be no-op
cgroup: remove redundant kernfs_activate in cgroup_setup_root()
| -rw-r--r-- | kernel/cgroup/cgroup.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index dd247747ec14..e41c21819ba0 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -2006,7 +2006,6 @@ int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask) BUG_ON(!list_empty(&root_cgrp->self.children)); BUG_ON(atomic_read(&root->nr_cgrps) != 1); - kernfs_activate(root_cgrp->kn); ret = 0; goto out; @@ -3682,6 +3681,9 @@ static ssize_t cgroup_file_write(struct kernfs_open_file *of, char *buf, struct cgroup_subsys_state *css; int ret; + if (!nbytes) + return 0; + /* * If namespaces are delegation boundaries, disallow writes to * files in an non-init namespace root from inside the namespace |