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| author | Tony Lindgren <tony@atomide.com> | 2016-01-25 19:46:21 +0100 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2016-01-25 19:46:21 +0100 |
| commit | 7e3b1207705c10ada363bbc7d0235730ce1f5b79 (patch) | |
| tree | cd1eb567acb4e72c1bdfbe8b59746c73b8627ee5 /arch/um/os-Linux/signal.c | |
| parent | ARM: omap2plus_defconfig: Enable ARM_KERNMEM_PERMS and few loadable modules (diff) | |
| parent | ARM: OMAP: Add PWM dmtimer platform data quirks (diff) | |
| download | linux-7e3b1207705c10ada363bbc7d0235730ce1f5b79.tar.xz linux-7e3b1207705c10ada363bbc7d0235730ce1f5b79.zip | |
Merge branch 'enable-devices' into omap-for-v4.5/fixes
Diffstat (limited to 'arch/um/os-Linux/signal.c')
| -rw-r--r-- | arch/um/os-Linux/signal.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index c211153ca69a..7801666514ed 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -62,6 +62,7 @@ static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc) static int signals_enabled; static unsigned int signals_pending; +static unsigned int signals_active = 0; void sig_handler(int sig, struct siginfo *si, mcontext_t *mc) { @@ -101,7 +102,12 @@ void timer_alarm_handler(int sig, struct siginfo *unused_si, mcontext_t *mc) block_signals(); + signals_active |= SIGALRM_MASK; + timer_real_alarm_handler(mc); + + signals_active &= ~SIGALRM_MASK; + set_signals(enabled); } @@ -286,8 +292,16 @@ void unblock_signals(void) if (save_pending & SIGIO_MASK) sig_handler_common(SIGIO, NULL, NULL); - if (save_pending & SIGALRM_MASK) + /* Do not reenter the handler */ + + if ((save_pending & SIGALRM_MASK) && (!(signals_active & SIGALRM_MASK))) timer_real_alarm_handler(NULL); + + /* Rerun the loop only if there is still pending SIGIO and not in TIMER handler */ + + if (!(signals_pending & SIGIO_MASK) && (signals_active & SIGALRM_MASK)) + return; + } } |