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signal: make sure we don't get stopped with pending task_work 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
wifi-calibration
Al Viro 2012-07-15 14:10:52 +04:00
parent 1e0ea00144
commit 7266702805
1 changed files with 15 additions and 0 deletions
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15
kernel/signal.c
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@ -1971,6 +1971,13 @@ static void ptrace_do_notify(int signr, int exit_code, int why)
void ptrace_notify(int exit_code)
{
BUG_ON((exit_code & (0x7f | ~0xffff)) != SIGTRAP);
if (unlikely(current->task_works)) {
if (test_and_clear_ti_thread_flag(current_thread_info(),
TIF_NOTIFY_RESUME)) {
smp_mb__after_clear_bit();
task_work_run();
}
}
spin_lock_irq(&current->sighand->siglock);
ptrace_do_notify(SIGTRAP, exit_code, CLD_TRAPPED);
@ -2191,6 +2198,14 @@ int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka,
struct signal_struct *signal = current->signal;
int signr;
if (unlikely(current->task_works)) {
if (test_and_clear_ti_thread_flag(current_thread_info(),
TIF_NOTIFY_RESUME)) {
smp_mb__after_clear_bit();
task_work_run();
}
}
if (unlikely(uprobe_deny_signal()))
return 0;