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Xen, mapcache: Fix the compute of the size of bucket.

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Because the size of a mapping is wrong when there is an offset and a
size >= bucket_size.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Anthony PERARD 2012-04-13 17:18:56 +00:00 committed by Stefano Stabellini
parent 77ba8fef89
commit 09ab48ee6c
1 changed files with 7 additions and 5 deletions
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12
xen-mapcache.c
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@ -216,12 +216,14 @@ tryagain:
}
/* size is always a multiple of MCACHE_BUCKET_SIZE */
if ((address_offset + (__size % MCACHE_BUCKET_SIZE)) > MCACHE_BUCKET_SIZE)
__size += MCACHE_BUCKET_SIZE;
if (__size % MCACHE_BUCKET_SIZE)
__size += MCACHE_BUCKET_SIZE - (__size % MCACHE_BUCKET_SIZE);
if (!__size)
if (size) {
__size = size + address_offset;
if (__size % MCACHE_BUCKET_SIZE) {
__size += MCACHE_BUCKET_SIZE - (__size % MCACHE_BUCKET_SIZE);
}
} else {
__size = MCACHE_BUCKET_SIZE;
}
entry = &mapcache->entry[address_index % mapcache->nr_buckets];