Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck

* 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck: (39 commits)
  signal: fix __send_signal() false positive kmemcheck warning
  fs: fix do_mount_root() false positive kmemcheck warning
  fs: introduce __getname_gfp()
  trace: annotate bitfields in struct ring_buffer_event
  net: annotate struct sock bitfield
  c2port: annotate bitfield for kmemcheck
  net: annotate inet_timewait_sock bitfields
  ieee1394/csr1212: fix false positive kmemcheck report
  ieee1394: annotate bitfield
  net: annotate bitfields in struct inet_sock
  net: use kmemcheck bitfields API for skbuff
  kmemcheck: introduce bitfield API
  kmemcheck: add opcode self-testing at boot
  x86: unify pte_hidden
  x86: make _PAGE_HIDDEN conditional
  kmemcheck: make kconfig accessible for other architectures
  kmemcheck: enable in the x86 Kconfig
  kmemcheck: add hooks for the page allocator
  kmemcheck: add hooks for page- and sg-dma-mappings
  kmemcheck: don't track page tables
  ...

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;