pmc_refcount 142 arch/x86/events/core.c static atomic_t pmc_refcount; pmc_refcount 340 arch/x86/events/core.c if (!atomic_inc_not_zero(&pmc_refcount)) { pmc_refcount 342 arch/x86/events/core.c if (atomic_read(&pmc_refcount) == 0) { pmc_refcount 349 arch/x86/events/core.c atomic_inc(&pmc_refcount); pmc_refcount 358 arch/x86/events/core.c if (atomic_dec_and_mutex_lock(&pmc_refcount, &pmc_reserve_mutex)) {