mm/debug-pagealloc.c: use plain __ratelimit() instead of printk_ratelimit()

printk_ratelimit() should not be used, because it shares ratelimiting
state with all other unrelated printk_ratelimit() callsites.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/mm/debug-pagealloc.c b/mm/debug-pagealloc.c
index a1e3324de2b..a4b6d707a31 100644
--- a/mm/debug-pagealloc.c
+++ b/mm/debug-pagealloc.c
@@ -2,6 +2,7 @@
 #include <linux/mm.h>
 #include <linux/page-debug-flags.h>
 #include <linux/poison.h>
+#include <linux/ratelimit.h>
 
 static inline void set_page_poison(struct page *page)
 {
@@ -59,6 +60,7 @@ static bool single_bit_flip(unsigned char a, unsigned char b)
 
 static void check_poison_mem(unsigned char *mem, size_t bytes)
 {
+        static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 10);
         unsigned char *start;
         unsigned char *end;
 
@@ -74,7 +76,7 @@ static void check_poison_mem(unsigned char *mem, size_t bytes)
                         break;
         }
 
-        if (!printk_ratelimit())
+        if (!__ratelimit(&ratelimit))
                 return;
         else if (start == end && single_bit_flip(*start, PAGE_POISON))
                 printk(KERN_ERR "pagealloc: single bit error\n");