A small cleanup. Our caller writes:
r = setup_demand_paging(...); if (r < 0) exit(-r);
Since we're just going to exit anyway, instead of returning an error we can just re-use TEST_ASSERT. This makes the caller simpler, as well as the function itself - no need to write our branches, etc.
Signed-off-by: Axel Rasmussen axelrasmussen@google.com --- .../selftests/kvm/demand_paging_test.c | 51 +++++++------------ 1 file changed, 19 insertions(+), 32 deletions(-)
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c index 9398ba6ef023..601a1df24dd2 100644 --- a/tools/testing/selftests/kvm/demand_paging_test.c +++ b/tools/testing/selftests/kvm/demand_paging_test.c @@ -9,6 +9,8 @@
#define _GNU_SOURCE /* for pipe2 */
+#include <inttypes.h> +#include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <time.h> @@ -198,42 +200,32 @@ static void *uffd_handler_thread_fn(void *arg) return NULL; }
-static int setup_demand_paging(struct kvm_vm *vm, - pthread_t *uffd_handler_thread, int pipefd, - useconds_t uffd_delay, - struct uffd_handler_args *uffd_args, - void *hva, uint64_t len) +static void setup_demand_paging(struct kvm_vm *vm, + pthread_t *uffd_handler_thread, int pipefd, + useconds_t uffd_delay, + struct uffd_handler_args *uffd_args, + void *hva, uint64_t len) { int uffd; struct uffdio_api uffdio_api; struct uffdio_register uffdio_register;
uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); - if (uffd == -1) { - pr_info("uffd creation failed\n"); - return -1; - } + TEST_ASSERT(uffd >= 0, "uffd creation failed, errno: %d", errno);
uffdio_api.api = UFFD_API; uffdio_api.features = 0; - if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) { - pr_info("ioctl uffdio_api failed\n"); - return -1; - } + TEST_ASSERT(ioctl(uffd, UFFDIO_API, &uffdio_api) != -1, + "ioctl UFFDIO_API failed: %" PRIu64, + (uint64_t)uffdio_api.api);
uffdio_register.range.start = (uint64_t)hva; uffdio_register.range.len = len; uffdio_register.mode = UFFDIO_REGISTER_MODE_MISSING; - if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register) == -1) { - pr_info("ioctl uffdio_register failed\n"); - return -1; - } - - if ((uffdio_register.ioctls & UFFD_API_RANGE_IOCTLS) != - UFFD_API_RANGE_IOCTLS) { - pr_info("unexpected userfaultfd ioctl set\n"); - return -1; - } + TEST_ASSERT(ioctl(uffd, UFFDIO_REGISTER, &uffdio_register) != -1, + "ioctl UFFDIO_REGISTER failed"); + TEST_ASSERT((uffdio_register.ioctls & UFFD_API_RANGE_IOCTLS) == + UFFD_API_RANGE_IOCTLS, "unexpected userfaultfd ioctl set");
uffd_args->uffd = uffd; uffd_args->pipefd = pipefd; @@ -243,8 +235,6 @@ static int setup_demand_paging(struct kvm_vm *vm,
PER_VCPU_DEBUG("Created uffd thread for HVA range [%p, %p)\n", hva, hva + len); - - return 0; }
struct test_params { @@ -321,13 +311,10 @@ static void run_test(enum vm_guest_mode mode, void *arg) O_CLOEXEC | O_NONBLOCK); TEST_ASSERT(!r, "Failed to set up pipefd");
- r = setup_demand_paging(vm, - &uffd_handler_threads[vcpu_id], - pipefds[vcpu_id * 2], - p->uffd_delay, &uffd_args[vcpu_id], - vcpu_hva, vcpu_mem_size); - if (r < 0) - exit(-r); + setup_demand_paging(vm, &uffd_handler_threads[vcpu_id], + pipefds[vcpu_id * 2], p->uffd_delay, + &uffd_args[vcpu_id], vcpu_hva, + vcpu_mem_size); } }