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signals: do_group_exit(): use signal_group_exit() more consistently
do_group_exit() checks SIGNAL_GROUP_EXIT to avoid taking sighand->siglock.
Since ed5d2cac11
exec() doesn't set this
flag, we should use signal_group_exit().
This is not needed for correctness, but can speedup the multithreaded exec
and makes the code more consistent.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@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:
parent
573cf9ad72
commit
bfc4b0890a
1 changed files with 4 additions and 3 deletions
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@ -1115,12 +1115,13 @@ asmlinkage long sys_exit(int error_code)
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NORET_TYPE void
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NORET_TYPE void
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do_group_exit(int exit_code)
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do_group_exit(int exit_code)
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{
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{
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struct signal_struct *sig = current->signal;
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BUG_ON(exit_code & 0x80); /* core dumps don't get here */
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BUG_ON(exit_code & 0x80); /* core dumps don't get here */
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if (current->signal->flags & SIGNAL_GROUP_EXIT)
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if (signal_group_exit(sig))
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exit_code = current->signal->group_exit_code;
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exit_code = sig->group_exit_code;
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else if (!thread_group_empty(current)) {
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else if (!thread_group_empty(current)) {
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struct signal_struct *const sig = current->signal;
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struct sighand_struct *const sighand = current->sighand;
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struct sighand_struct *const sighand = current->sighand;
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spin_lock_irq(&sighand->siglock);
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spin_lock_irq(&sighand->siglock);
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if (signal_group_exit(sig))
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if (signal_group_exit(sig))
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