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| author | Vegard Nossum <vegard.nossum@gmail.com> | 2009-02-26 09:55:52 +0100 |
|---|---|---|
| committer | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-15 12:40:10 +0200 |
| commit | 33f65df7ed1abcaac32ba620b9976a4d8cea3248 (patch) | |
| tree | 9ca9edafa1b2bdae5c023e447c10740bf9d7cf85 /crypto/xor.c | |
| parent | c175eea466e760de4b69b9aad90157e7aa9ff54f (diff) | |
| download | lwn-33f65df7ed1abcaac32ba620b9976a4d8cea3248.tar.gz lwn-33f65df7ed1abcaac32ba620b9976a4d8cea3248.zip | |
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/xor.c')
| -rw-r--r-- | crypto/xor.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/crypto/xor.c b/crypto/xor.c index 996b6ee57d9e..fc5b836f3430 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; |