diff options
Diffstat (limited to 'tools/testing/selftests/mm/vm_util.c')
-rw-r--r-- | tools/testing/selftests/mm/vm_util.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/testing/selftests/mm/vm_util.c b/tools/testing/selftests/mm/vm_util.c index bb633d050d71..5ee6c4688a7c 100644 --- a/tools/testing/selftests/mm/vm_util.c +++ b/tools/testing/selftests/mm/vm_util.c @@ -3,6 +3,8 @@ #include <fcntl.h> #include <sys/ioctl.h> #include <linux/userfaultfd.h> +#include <sys/syscall.h> +#include <unistd.h> #include "../kselftest.h" #include "vm_util.h" @@ -230,3 +232,25 @@ int uffd_unregister(int uffd, void *addr, uint64_t len) return ret; } + +int uffd_open_dev(unsigned int flags) +{ + int fd, uffd; + + fd = open("/dev/userfaultfd", O_RDWR | O_CLOEXEC); + if (fd < 0) + return fd; + uffd = ioctl(fd, USERFAULTFD_IOC_NEW, flags); + close(fd); + + return uffd; +} + +int uffd_open_sys(unsigned int flags) +{ +#ifdef __NR_userfaultfd + return syscall(__NR_userfaultfd, flags); +#else + return -1; +#endif +} |