#include #include pthread_mutex_t a = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t b = PTHREAD_MUTEX_INITIALIZER; pthread_barrier_t bar; void *ba_lock(void *arg) { int ret, i; pthread_mutex_lock(&b); if (pthread_barrier_wait(&bar) == PTHREAD_BARRIER_SERIAL_THREAD) pthread_barrier_destroy(&bar); pthread_mutex_lock(&a); pthread_mutex_unlock(&a); pthread_mutex_unlock(&b); } int main(void) { pthread_t t; pthread_barrier_init(&bar, NULL, 2); if (pthread_create(&t, NULL, ba_lock, NULL)) { fprintf(stderr, "pthread_create() failed\n"); return 1; } pthread_mutex_lock(&a); if (pthread_barrier_wait(&bar) == PTHREAD_BARRIER_SERIAL_THREAD) pthread_barrier_destroy(&bar); pthread_mutex_lock(&b); pthread_mutex_unlock(&b); pthread_mutex_unlock(&a); pthread_join(t, NULL); return 0; } ex : net-next.git
net-next plumbingsTobias Klauser
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authorMarc Zyngier <marc.zyngier@arm.com>2017-01-17 14:21:56 +0000
committerBjorn Helgaas <bhelgaas@google.com>2017-01-17 08:41:51 -0600
commit4d191b1b63c209e37bf27938ef365244d3c41084 (patch)
treef2ab6cdb65ddacdf2e7c019cd55e353f0c16b400 /tools/lib/subcmd/help.c
parent51ebfc92b72b4f7dac1ab45683bf56741e454b8c (diff)
PCI/MSI: pci-xgene-msi: Fix CPU hotplug registration handling
The conversion to the new hotplug state machine introduced a regression where a successful hotplug registration would be treated as an error, effectively disabling the MSI driver forever. Fix it by doing the proper check on the return value. Fixes: 9c248f8896e6 ("PCI/xgene-msi: Convert to hotplug state machine") Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by: Duc Dang <dhdang@apm.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: stable@vger.kernel.org
Diffstat (limited to 'tools/lib/subcmd/help.c')