path: root/Documentation
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authorChristian Riesch <christian.riesch@omicron.at>2014-06-16 14:46:45 +0200
committerDavid S. Miller <davem@davemloft.net>2014-06-16 21:32:31 -0700
commit42e1358e103de0fe07d3e8ff40c16bb1fa844e26 (patch)
tree7f042f2a555185625f51f013fe0e1d3adbad60bf /Documentation
parentddc6fbd83a22d35726e262a6c698376f3ca1654e (diff)
ptp: In the testptp utility, use clock_adjtime from glibc when available
clock_adjtime was included in glibc 2.14. _GNU_SOURCE must be defined to make it available. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Cc: Richard Cochran <richardcochran@gmail.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/ptp/testptp.c b/Documentation/ptp/testptp.c
index f1ac2dae999e..ba1d50200c46 100644
--- a/Documentation/ptp/testptp.c
+++ b/Documentation/ptp/testptp.c
@@ -17,6 +17,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
@@ -46,12 +47,14 @@
#define CLOCK_INVALID -1
-/* When glibc offers the syscall, this will go away. */
+/* clock_adjtime is not available in GLIBC < 2.14 */
+#if !__GLIBC_PREREQ(2, 14)
#include <sys/syscall.h>
static int clock_adjtime(clockid_t id, struct timex *tx)
return syscall(__NR_clock_adjtime, id, tx);
static clockid_t get_clockid(int fd)

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