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/linux-4.1.27/Documentation/timers/
H A Dhpet_example.c226 sig_t oldsig; hpet_fasync() local
232 if ((oldsig = signal(SIGIO, hpet_sigio)) == SIG_ERR) { hpet_fasync()
288 signal(SIGIO, oldsig); hpet_fasync()

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