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>
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@ -1,4 +1,5 @@
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/page-debug-flags.h>
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#include <linux/poison.h>
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@ -64,11 +65,8 @@ static void check_poison_mem(unsigned char *mem, size_t bytes)
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unsigned char *start;
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unsigned char *end;
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for (start = mem; start < mem + bytes; start++) {
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if (*start != PAGE_POISON)
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break;
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}
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if (start == mem + bytes)
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start = memchr_inv(mem, PAGE_POISON, bytes);
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if (!start)
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return;
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for (end = mem + bytes - 1; end > start; end--) {
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