diff options
| author | Johannes Weiner <[email protected]> | 2008-08-20 14:09:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2008-08-20 15:40:31 -0700 |
| commit | 481ebd0d76b501c5772f702ae31e55350c0858a3 (patch) | |
| tree | 37f13727a66bf2cb10e4d8be7a608edf9cd5009e /net/lapb/lapb_subr.c | |
| parent | a09f48551273ee89d4e9ae37474807dc2da1d757 (diff) | |
bootmem: fix aligning of node-relative indexes and offsets
Absolute alignment requirements may never be applied to node-relative
offsets. Andreas Herrmann spotted this flaw when a bootmem allocation on
an unaligned node was itself not aligned because the combination of an
unaligned node with an aligned offset into that node is not garuanteed to
be aligned itself.
This patch introduces two helper functions that align a node-relative
index or offset with respect to the node's starting address so that the
absolute PFN or virtual address that results from combining the two
satisfies the requested alignment.
Then all the broken ALIGN()s in alloc_bootmem_core() are replaced by these
helpers.
Signed-off-by: Johannes Weiner <[email protected]>
Reported-by: Andreas Herrmann <[email protected]>
Debugged-by: Andreas Herrmann <[email protected]>
Reviewed-by: Andreas Herrmann <[email protected]>
Tested-by: Andreas Herrmann <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'net/lapb/lapb_subr.c')
0 files changed, 0 insertions, 0 deletions