From: Tejun Heo Date: Tue, 24 Feb 2009 02:57:20 +0000 (+0900) Subject: percpu: fix pcpu_chunk_struct_size X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cb83b42e23bd6c4bf91793a320fbe83787c13596;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git 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 --- 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]));