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percpu: fix pcpu_chunk_struct_size

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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>
This commit is contained in:
Tejun Heo 2009-02-24 11:57:20 +09:00
parent cae3aeb83f
commit cb83b42e23
1 changed files with 1 additions and 1 deletions
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2
mm/percpu.c
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@ -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]));