[PATCH] introduce sig_needs_tasklist() helper
In my opinion this patch cleans up the code. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -147,6 +147,9 @@ static kmem_cache_t *sigqueue_cachep;
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#define sig_kernel_stop(sig) \
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(((sig) < SIGRTMIN) && T(sig, SIG_KERNEL_STOP_MASK))
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#define sig_needs_tasklist(sig) \
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(((sig) < SIGRTMIN) && T(sig, SIG_KERNEL_STOP_MASK | M(SIGCONT)))
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#define sig_user_defined(t, signr) \
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(((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) && \
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((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_IGN))
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@ -1199,7 +1202,7 @@ kill_proc_info(int sig, struct siginfo *info, pid_t pid)
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struct task_struct *p;
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rcu_read_lock();
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if (unlikely(sig_kernel_stop(sig) || sig == SIGCONT)) {
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if (unlikely(sig_needs_tasklist(sig))) {
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read_lock(&tasklist_lock);
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acquired_tasklist_lock = 1;
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}
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