mm/debug-pagealloc.c: use memchr_inv

Use newly introduced memchr_inv() for page verification. 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>

mm/debug-pagealloc.c: use memchr_inv
Use newly introduced memchr_inv() for page verification. 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>
Akinobu Mita · Linus Torvalds
1 parent 798248206b
Showing 1 changed file with 3 additions and 5 deletions Side-by-side Diff
mm/debug-pagealloc.c
 #include <linux/kernel.h>
+#include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/page-debug-flags.h>
 #include <linux/poison.h>
@@ -64,11 +65,8 @@
 	unsigned char *start;
 	unsigned char *end;
  
-	for (start = mem; start < mem + bytes; start++) {
-		if (*start != PAGE_POISON)
-			break;
-	}
-	if (start == mem + bytes)
+	start = memchr_inv(mem, PAGE_POISON, bytes);
+	if (!start)
 		return;
  
 	for (end = mem + bytes - 1; end > start; end--) {
1	1	#include <linux/kernel.h>
	2	+#include <linux/string.h>
2	3	#include <linux/mm.h>
3	4	#include <linux/page-debug-flags.h>
4	5	#include <linux/poison.h>
...	...	@@ -64,11 +65,8 @@
64	65	unsigned char *start;
65	66	unsigned char *end;
66	67
67		- for (start = mem; start < mem + bytes; start++) {
68		- if (*start != PAGE_POISON)
69		- break;
70		- }
71		- if (start == mem + bytes)
	68	+ start = memchr_inv(mem, PAGE_POISON, bytes);
	69	+ if (!start)
72	70	return;
73	71
74	72	for (end = mem + bytes - 1; end > start; end--) {