1 files changed, 1 insertions, 13 deletions

diff --git a/Documentation/perf_counter/kerneltop.c b/Documentation/perf_counter/kerneltop.c
index fda1438365dc..2779c57ad4ba 100644
--- a/Documentation/perf_counter/kerneltop.c
+++ b/Documentation/perf_counter/kerneltop.c
@@ -1125,22 +1125,10 @@ struct mmap_data {
 static unsigned int mmap_read_head(struct mmap_data *md)
 {
         struct perf_counter_mmap_page *pc = md->base;
-        unsigned int seq, head;
-
-repeat:
-        rmb();
-        seq = pc->lock;
-
-        if (unlikely(seq & 1)) {
-                cpu_relax();
-                goto repeat;
-        }
+        int head;
 
         head = pc->data_head;
-
         rmb();
-        if (pc->lock != seq)
-                goto repeat;
 
         return head;
 }