On 12/03/2014 04:26 PM, Sasha Levin wrote:
All the bit operations (such as find_first_zero_bit()) read sizeof(long) bytes at a time. If we allocated less than sizeof(long) bytes for the bitmask we would be accessing invalid memory when working with the bitmask.
Change the allocator to allocate sizeof(long) multiples for the bitmask.
Signed-off-by: Sasha Levin sasha.levin@oracle.com
drivers/gpu/drm/amd/amdkfd/kfd_pasid.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c b/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c index 2458ab7..71699ad 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c @@ -32,8 +32,7 @@ int kfd_pasid_init(void) { pasid_limit = max_num_of_processes;
- pasid_bitmap = kzalloc(DIV_ROUND_UP(pasid_limit, BITS_PER_BYTE),
GFP_KERNEL);
- pasid_bitmap = kzalloc(BITS_TO_LONGS(pasid_limit), GFP_KERNEL); if (!pasid_bitmap) return -ENOMEM;
Thanks! Applied to my -next tree.
Oded