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| author |   Tejun Heo <tj@kernel.org> | 2009-02-24 11:57:20 +0900 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-02-24 11:57:20 +0900 |
| commit | cb83b42e23bd6c4bf91793a320fbe83787c13596 (patch) | |
| tree | 7f2b83bccf1be9548f84fa74867043aaad0a3e45 /mm/percpu.c | |
| parent | percpu: clean up size usage (diff) | |
| download | linux-dev-cb83b42e23bd6c4bf91793a320fbe83787c13596.tar.xz linux-dev-cb83b42e23bd6c4bf91793a320fbe83787c13596.zip | |
percpu: fix pcpu_chunk_struct_size
Impact: fix short allocation leading to memory corruption
While dropping rvalue wrapping macros around global parameters,
pcpu_chunk_struct_size was set incorrectly resulting in shorter page
pointer array. Fix it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/percpu.c')
| -rw-r--r-- | mm/percpu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 997724c2ea24..ed92caa2aa3b 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -850,7 +850,7 @@ size_t __init pcpu_setup_static(pcpu_populate_pte_fn_t populate_pte_fn, pcpu_chunk_size = num_possible_cpus() * pcpu_unit_size; pcpu_nr_slots = pcpu_size_to_slot(pcpu_unit_size) + 1; pcpu_chunk_struct_size = sizeof(struct pcpu_chunk) - + (1 << pcpu_unit_pages_shift) * sizeof(struct page *); + + num_possible_cpus() * pcpu_unit_pages * sizeof(struct page *); /* allocate chunk slots */ pcpu_slot = alloc_bootmem(pcpu_nr_slots * sizeof(pcpu_slot[0])); |