1 files changed, 9 insertions, 14 deletions

diff --git a/lib/errseq.c b/lib/errseq.c
index df782418b333..81f9e33aa7e7 100644
--- a/lib/errseq.c
+++ b/lib/errseq.c
@@ -111,27 +111,22 @@ EXPORT_SYMBOL(errseq_set);
  * errseq_sample() - Grab current errseq_t value.
  * @eseq: Pointer to errseq_t to be sampled.
  *
- * This function allows callers to sample an errseq_t value, marking it as
- * "seen" if required.
+ * This function allows callers to initialise their errseq_t variable.
+ * If the error has been "seen", new callers will not see an old error.
+ * If there is an unseen error in @eseq, the caller of this function will
+ * see it the next time it checks for an error.
  *
+ * Context: Any context.
  * Return: The current errseq value.
  */
 errseq_t errseq_sample(errseq_t *eseq)
 {
         errseq_t old = READ_ONCE(*eseq);
-        errseq_t new = old;
 
-        /*
-         * For the common case of no errors ever having been set, we can skip
-         * marking the SEEN bit. Once an error has been set, the value will
-         * never go back to zero.
-         */
-        if (old != 0) {
-                new |= ERRSEQ_SEEN;
-                if (old != new)
-                        cmpxchg(eseq, old, new);
-        }
-        return new;
+        /* If nobody has seen this error yet, then we can be the first. */
+        if (!(old & ERRSEQ_SEEN))
+                old = 0;
+        return old;
 }
 EXPORT_SYMBOL(errseq_sample);