X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=gettime.h;h=c55f5cba779f5269e6fbc6b96c1e85e419d40683;hb=0123751ca55fe462e8888c8d7b8c7def14b74ab3;hp=f92ee8c430c8d9cdb48f31effabd885af07c9257;hpb=a0eba8208b58c8d13e6076460a3affeb9596adf7;p=fio.git

diff --git a/gettime.h b/gettime.h
index f92ee8c4..c55f5cba 100644
--- a/gettime.h
+++ b/gettime.h
@@ -4,6 +4,7 @@
 #include <sys/time.h>
 
 #include "arch/arch.h"
+#include "lib/seqlock.h"
 
 /*
  * Clock sources
@@ -22,20 +23,22 @@ extern int fio_start_gtod_thread(void);
 extern int fio_monotonic_clocktest(int debug);
 extern void fio_local_clock_init(void);
 
-extern struct timespec *fio_ts;
+extern struct fio_ts {
+	struct seqlock seqlock;
+	struct timespec ts;
+} *fio_ts;
 
 static inline int fio_gettime_offload(struct timespec *ts)
 {
-	time_t last_sec;
+	unsigned int seq;
 
 	if (!fio_ts)
 		return 0;
 
 	do {
-		read_barrier();
-		last_sec = ts->tv_sec = fio_ts->tv_sec;
-		ts->tv_nsec = fio_ts->tv_nsec;
-	} while (fio_ts->tv_sec != last_sec);
+		seq = read_seqlock_begin(&fio_ts->seqlock);
+		*ts = fio_ts->ts;
+	} while (read_seqlock_retry(&fio_ts->seqlock, seq));
 
 	return 1;
 }