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platform_kernel-5.15
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exit: move taskstats_tgid_free() from __exit_signal() to free_signal_struct() 

Move taskstats_tgid_free() from __exit_signal() to free_signal_struct().

This way signal->stats never points to nowhere and we can read ->stats
lockless.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Veaceslav Falico <vfalico@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2010-05-26 14:43:20 -07:00 committed by Linus Torvalds
parent a705be6b5e
commit 97101eb41d
2 changed files with 1 additions and 1 deletions
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1
kernel/exit.c
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@ -144,7 +144,6 @@ static void __exit_signal(struct task_struct *tsk)
clear_tsk_thread_flag(tsk,TIF_SIGPENDING); clear_tsk_thread_flag(tsk,TIF_SIGPENDING);
if (group_dead) { if (group_dead) {
flush_sigqueue(&sig->shared_pending); flush_sigqueue(&sig->shared_pending);
taskstats_tgid_free(sig);
tty_kref_put(tty); tty_kref_put(tty);
} }
} }

1
kernel/fork.c
View File

@ -167,6 +167,7 @@ EXPORT_SYMBOL(free_task);
static inline void free_signal_struct(struct signal_struct *sig) static inline void free_signal_struct(struct signal_struct *sig)
{ {
taskstats_tgid_free(sig);
kmem_cache_free(signal_cachep, sig); kmem_cache_free(signal_cachep, sig);
} }