diff options
Diffstat (limited to 'misc/tst-preadvwritev2-common.c')
| -rw-r--r-- | misc/tst-preadvwritev2-common.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/misc/tst-preadvwritev2-common.c b/misc/tst-preadvwritev2-common.c index 4c53d567b5..8abedc14d0 100644 --- a/misc/tst-preadvwritev2-common.c +++ b/misc/tst-preadvwritev2-common.c @@ -16,21 +16,16 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#include <limits.h> #include <support/check.h> static void do_test_with_invalid_flags (void) { - int invalid_flag = 0x1; -#ifdef RWF_HIPRI - invalid_flag <<= 1; -#endif -#ifdef RWF_DSYNC - invalid_flag <<= 1; -#endif -#ifdef RWF_SYNC - invalid_flag <<= 1; -#endif +#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT) + /* Set the next bit from the mask of all supported flags. */ + int invalid_flag = __builtin_clz (RWF_SUPPORTED); + invalid_flag = 0x1 << ((sizeof (int) * CHAR_BIT) - invalid_flag); char buf[32]; const struct iovec vec = { .iov_base = buf, .iov_len = sizeof (buf) }; |