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authorVegard Nossum <vegard.nossum@gmail.com>2009-02-26 09:55:52 +0100
committerVegard Nossum <vegard.nossum@gmail.com>2009-06-15 12:40:10 +0200
commit33f65df7ed1abcaac32ba620b9976a4d8cea3248 (patch)
tree9ca9edafa1b2bdae5c023e447c10740bf9d7cf85 /crypto
parentc175eea466e760de4b69b9aad90157e7aa9ff54f (diff)
downloadlinux-linaro-33f65df7ed1abcaac32ba620b9976a4d8cea3248.tar.gz
crypto: don't track xor test pages with kmemcheck
The xor tests are run on uninitialized data, because it is doesn't really matter what the underlying data is. Annotate this false- positive warning. Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/xor.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/crypto/xor.c b/crypto/xor.c
index 996b6ee57d9..fc5b836f343 100644
--- a/crypto/xor.c
+++ b/crypto/xor.c
@@ -101,7 +101,12 @@ calibrate_xor_blocks(void)
void *b1, *b2;
struct xor_block_template *f, *fastest;
- b1 = (void *) __get_free_pages(GFP_KERNEL, 2);
+ /*
+ * Note: Since the memory is not actually used for _anything_ but to
+ * test the XOR speed, we don't really want kmemcheck to warn about
+ * reading uninitialized bytes here.
+ */
+ b1 = (void *) __get_free_pages(GFP_KERNEL | __GFP_NOTRACK, 2);
if (!b1) {
printk(KERN_WARNING "xor: Yikes! No memory available.\n");
return -ENOMEM;