percpu: make pcpu_build_alloc_info() clear static buffers



pcpu_build_alloc_info() may be called multiple times when percpu is
falling back to different first chunk allocator.  Make it clear static
buffers so that they don't contain values from previous runs.

Signed-off-by: Tejun Heo <tj@kernel.org>

parent ffe0d5a5

mm/percpu.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1347,6 +1347,10 @@ struct pcpu_alloc_info * __init pcpu_build_alloc_info(
		struct pcpu_alloc_info *ai;
		unsigned int *cpu_map;

		/* this function may be called multiple times */
		memset(group_map, 0, sizeof(group_map));
		memset(group_cnt, 0, sizeof(group_map));

		/*
		* Determine min_unit_size, alloc_size and max_upa such that
		* alloc_size is multiple of atom_size and is the smallest