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Merge tag 'for-linus-2020-03-07' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux

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Pull thread fixes from Christian Brauner:
 "Here are a few hopefully uncontroversial fixes:

   - Use RCU_INIT_POINTER() when initializing rcu protected members in
     task_struct to fix sparse warnings.

   - Add pidfd_fdinfo_test binary to .gitignore file"

* tag 'for-linus-2020-03-07' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux:
  selftests: pidfd: Add pidfd_fdinfo_test in .gitignore
  exit: Fix Sparse errors and warnings
  fork: Use RCU_INIT_POINTER() instead of rcu_access_pointer()
This commit is contained in:
Linus Torvalds
2020-03-07 08:01:43 -06:00
parent 676fc8de31 186e28a18a
commit fa883d6afb
3 changed files with 4 additions and 3 deletions
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4
kernel/exit.c
View File

@@ -619,8 +619,8 @@ static void forget_original_parent(struct task_struct *father,
reaper = find_new_reaper(father, reaper);
list_for_each_entry(p, &father->children, sibling) {
for_each_thread(p, t) {
t->real_parent = reaper;
BUG_ON((!t->ptrace) != (t->parent == father));
RCU_INIT_POINTER(t->real_parent, reaper);
BUG_ON((!t->ptrace) != (rcu_access_pointer(t->parent) == father));
if (likely(!t->ptrace))
t->parent = t->real_parent;
if (t->pdeath_signal)

2
kernel/fork.c
View File

@@ -1508,7 +1508,7 @@ static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
return 0;
}
sig = kmem_cache_alloc(sighand_cachep, GFP_KERNEL);
rcu_assign_pointer(tsk->sighand, sig);
RCU_INIT_POINTER(tsk->sighand, sig);
if (!sig)
return -ENOMEM;

1
tools/testing/selftests/pidfd/.gitignore vendored
View File

@@ -2,4 +2,5 @@ pidfd_open_test
pidfd_poll_test
pidfd_test
pidfd_wait
pidfd_fdinfo_test
pidfd_getfd_test