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crypto: don't track xor test pages with kmemcheck

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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>
This commit is contained in:
Vegard Nossum 2009-02-26 09:55:52 +01:00
parent c175eea466
commit 33f65df7ed
1 changed files with 6 additions and 1 deletions
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7
crypto/xor.c
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@ -101,7 +101,12 @@ calibrate_xor_blocks(void)
void *b1, *b2; void *b1, *b2;
struct xor_block_template *f, *fastest; 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) { if (!b1) {
printk(KERN_WARNING "xor: Yikes! No memory available.\n"); printk(KERN_WARNING "xor: Yikes! No memory available.\n");
return -ENOMEM; return -ENOMEM;