Merge branch 'next' into for-linus

Prepare input updates for 6.6 merge window.

1 files changed, 20 insertions, 7 deletions

diff --git a/tools/testing/selftests/proc/proc-uptime-002.c b/tools/testing/selftests/proc/proc-uptime-002.c
index 7d0aa22bdc12b..ae453daa96c19 100644
--- a/tools/testing/selftests/proc/proc-uptime-002.c
+++ b/tools/testing/selftests/proc/proc-uptime-002.c
@@ -13,8 +13,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
-// Test that values in /proc/uptime increment monotonically
-// while shifting across CPUs.
+// Test that boottime value in /proc/uptime and CLOCK_BOOTTIME increment
+// monotonically while shifting across CPUs. We don't test idle time
+// monotonicity due to broken iowait task counting, cf: comment above
+// get_cpu_idle_time_us()
 #undef NDEBUG
 #include <assert.h>
 #include <errno.h>
@@ -42,10 +44,10 @@ static inline int sys_sched_setaffinity(pid_t pid, unsigned int len, unsigned lo
 
 int main(void)
 {
+	uint64_t u0, u1, c0, c1;
 	unsigned int len;
 	unsigned long *m;
 	unsigned int cpu;
-	uint64_t u0, u1, i0, i1;
 	int fd;
 
 	/* find out "nr_cpu_ids" */
@@ -60,7 +62,9 @@ int main(void)
 	fd = open("/proc/uptime", O_RDONLY);
 	assert(fd >= 0);
 
-	proc_uptime(fd, &u0, &i0);
+	u0 = proc_uptime(fd);
+	c0 = clock_boottime();
+
 	for (cpu = 0; cpu < len * 8; cpu++) {
 		memset(m, 0, len);
 		m[cpu / (8 * sizeof(unsigned long))] |= 1UL << (cpu % (8 * sizeof(unsigned long)));
@@ -68,11 +72,20 @@ int main(void)
 		/* CPU might not exist, ignore error */
 		sys_sched_setaffinity(0, len, m);
 
-		proc_uptime(fd, &u1, &i1);
+		u1 = proc_uptime(fd);
+		c1 = clock_boottime();
+
+		/* Is /proc/uptime monotonic ? */
 		assert(u1 >= u0);
-		assert(i1 >= i0);
+
+		/* Is CLOCK_BOOTTIME monotonic ? */
+		assert(c1 >= c0);
+
+		/* Is CLOCK_BOOTTIME VS /proc/uptime monotonic ? */
+		assert(c0 >= u0);
+
 		u0 = u1;
-		i0 = i1;
+		c0 = c1;
 	}
 
 	return 0;