>From a3544822ccd81e63b98f3db3c428c1867c983e9a Mon Sep 17 00:00:00 2001
From: Akira Yokosawa <akiyks@xxxxxxxxx>
Date: Mon, 8 Oct 2018 16:11:29 +0900
Subject: [PATCH 2/6] count: Fix uses of READ/WRITE_ONCE() in count_lim_app
Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx>
---
CodeSamples/count/count_lim_app.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/CodeSamples/count/count_lim_app.c b/CodeSamples/count/count_lim_app.c
index 1817c19..ad8f09f 100644
--- a/CodeSamples/count/count_lim_app.c
+++ b/CodeSamples/count/count_lim_app.c
@@ -59,7 +59,7 @@ static void balance_count(void)
int add_count(unsigned long delta)
{
if (countermax - counter >= delta) {
- counter += delta;
+ WRITE_ONCE(counter, counter + delta);
return 1;
}
spin_lock(&gblcnt_mutex);
@@ -77,7 +77,7 @@ int add_count(unsigned long delta)
int sub_count(unsigned long delta)
{
if (counter >= delta) {
- counter -= delta;
+ WRITE_ONCE(counter, counter - delta);
return 1;
}
spin_lock(&gblcnt_mutex);
@@ -101,7 +101,7 @@ unsigned long read_count(void)
sum = globalcount;
for_each_thread(t)
if (counterp[t] != NULL)
- sum += *counterp[t];
+ sum += READ_ONCE(*counterp[t]);
spin_unlock(&gblcnt_mutex);
return sum;
}
--
2.7.4
