diff options
Diffstat (limited to 'tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c')
-rw-r--r-- | tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c deleted file mode 100644 index b4083ae348fb..000000000000 --- a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c +++ /dev/null @@ -1,79 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <config.h> - -#include "preempt.h" - -#include "assume.h" -#include "locks.h" - -/* Support NR_CPUS of at most 64 */ -#define CPU_PREEMPTION_LOCKS_INIT0 LOCK_IMPL_INITIALIZER -#define CPU_PREEMPTION_LOCKS_INIT1 \ - CPU_PREEMPTION_LOCKS_INIT0, CPU_PREEMPTION_LOCKS_INIT0 -#define CPU_PREEMPTION_LOCKS_INIT2 \ - CPU_PREEMPTION_LOCKS_INIT1, CPU_PREEMPTION_LOCKS_INIT1 -#define CPU_PREEMPTION_LOCKS_INIT3 \ - CPU_PREEMPTION_LOCKS_INIT2, CPU_PREEMPTION_LOCKS_INIT2 -#define CPU_PREEMPTION_LOCKS_INIT4 \ - CPU_PREEMPTION_LOCKS_INIT3, CPU_PREEMPTION_LOCKS_INIT3 -#define CPU_PREEMPTION_LOCKS_INIT5 \ - CPU_PREEMPTION_LOCKS_INIT4, CPU_PREEMPTION_LOCKS_INIT4 - -/* - * Simulate disabling preemption by locking a particular cpu. NR_CPUS - * should be the actual number of cpus, not just the maximum. - */ -struct lock_impl cpu_preemption_locks[NR_CPUS] = { - CPU_PREEMPTION_LOCKS_INIT0 -#if (NR_CPUS - 1) & 1 - , CPU_PREEMPTION_LOCKS_INIT0 -#endif -#if (NR_CPUS - 1) & 2 - , CPU_PREEMPTION_LOCKS_INIT1 -#endif -#if (NR_CPUS - 1) & 4 - , CPU_PREEMPTION_LOCKS_INIT2 -#endif -#if (NR_CPUS - 1) & 8 - , CPU_PREEMPTION_LOCKS_INIT3 -#endif -#if (NR_CPUS - 1) & 16 - , CPU_PREEMPTION_LOCKS_INIT4 -#endif -#if (NR_CPUS - 1) & 32 - , CPU_PREEMPTION_LOCKS_INIT5 -#endif -}; - -#undef CPU_PREEMPTION_LOCKS_INIT0 -#undef CPU_PREEMPTION_LOCKS_INIT1 -#undef CPU_PREEMPTION_LOCKS_INIT2 -#undef CPU_PREEMPTION_LOCKS_INIT3 -#undef CPU_PREEMPTION_LOCKS_INIT4 -#undef CPU_PREEMPTION_LOCKS_INIT5 - -__thread int thread_cpu_id; -__thread int preempt_disable_count; - -void preempt_disable(void) -{ - BUG_ON(preempt_disable_count < 0 || preempt_disable_count == INT_MAX); - - if (preempt_disable_count++) - return; - - thread_cpu_id = nondet_int(); - assume(thread_cpu_id >= 0); - assume(thread_cpu_id < NR_CPUS); - lock_impl_lock(&cpu_preemption_locks[thread_cpu_id]); -} - -void preempt_enable(void) -{ - BUG_ON(preempt_disable_count < 1); - - if (--preempt_disable_count) - return; - - lock_impl_unlock(&cpu_preemption_locks[thread_cpu_id]); -} |