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virtio: use u32, not bitmap for features

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It seemed like a good idea to use bitmap for features
in struct virtio_device, but it's actually a pain,
and seems to become even more painful when we get more
than 32 feature bits.  Just change it to a u32 for now.

Based on patch by Rusty.

Suggested-by: David Hildenbrand <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>
Signed-off-by: Cornelia Huck <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
This commit is contained in:
Michael S. Tsirkin 2014-10-07 16:39:42 +02:00
commit e16e12be34
16 changed files with 42 additions and 74 deletions
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2
drivers/misc/mic/card/mic_virtio.c
View file

@ -101,7 +101,7 @@ static void mic_finalize_features(struct virtio_device *vdev)
bits = min_t(unsigned, feature_len,
sizeof(vdev->features)) * 8;
for (i = 0; i < bits; i++) {
if (test_bit(i, vdev->features))
if (__virtio_test_bit(vdev, i))
iowrite8(ioread8(&out_features[i / 8]) | (1 << (i % 8)),
&out_features[i / 8]);
}