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| author |   Michael S. Tsirkin <mst@redhat.com> | 2012-06-24 19:24:42 +0300 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2012-06-25 12:38:35 +0300 |
| commit | d0a69d6321ca759bb8d47803d06ba8571ab42d07 (patch) | |
| tree | 6b94990e0b4d43251740fa60deef29148bce9d58 /Documentation/virtual | |
| parent | KVM guest: guest side for eoi avoidance (diff) | |
| download | linux-dev-d0a69d6321ca759bb8d47803d06ba8571ab42d07.tar.xz linux-dev-d0a69d6321ca759bb8d47803d06ba8571ab42d07.zip | |
x86, bitops: note on __test_and_clear_bit atomicity
__test_and_clear_bit is actually atomic with respect
to the local CPU. Add a note saying that KVM on x86
relies on this behaviour so people don't accidentaly break it.
Also warn not to rely on this in portable code.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'Documentation/virtual')
0 files changed, 0 insertions, 0 deletions