diff options
| author | Prarit Bhargava <[email protected]> | 2009-12-09 13:36:45 -0500 |
|---|---|---|
| committer | H. Peter Anvin <[email protected]> | 2009-12-10 17:19:03 -0800 |
| commit | ebb682f522411abbe358059a256a8672ec0bd55b (patch) | |
| tree | ff8ebb34f17ec3c3d445857be9da7fd35f4579a0 /lib/cpu-notifier-error-inject.c | |
| parent | 9cf7826743e5c78dcfcfdc99d17f79ce6d3a2942 (diff) | |
x86, AMD: Fix stale cpuid4_info shared_map data in shared_cpu_map cpumasks
The per_cpu cpuid4_info shared_map can contain stale data when CPUs are added
and removed.
The stale data can lead to a NULL pointer derefernce panic on a remove of a
CPU that has had siblings previously removed.
This patch resolves the panic by verifying a cpu is actually online before
adding it to the shared_cpu_map, only examining cpus that are part of
the same lower level cache, and by updating other siblings lowest level cache
maps when a cpu is added.
Signed-off-by: Prarit Bhargava <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Diffstat (limited to 'lib/cpu-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions