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>
diff --git a/mm/percpu.c b/mm/percpu.c
index 997724c..ed92caa 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -850,7 +850,7 @@
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]));