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percpu: don't forget to free the temporary struct pcpu_alloc_info

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Unlike the SMP case, the !SMP case does not free the memory for struct
pcpu_alloc_info allocated in setup_per_cpu_areas(). And to give it a
chance of being reused by the page allocator later, align it to a page
boundary just like its size.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Dennis Zhou <dennisszhou@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Nicolas Pitre 2017-10-03 18:29:49 -04:00 committed by Tejun Heo
parent d81fa669e3
commit 438a506180
1 changed files with 2 additions and 1 deletions
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3
mm/percpu.c
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@ -1851,7 +1851,7 @@ struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
__alignof__(ai->groups[0].cpu_map[0]));
ai_size = base_size + nr_units * sizeof(ai->groups[0].cpu_map[0]);
ptr = memblock_virt_alloc_nopanic(PFN_ALIGN(ai_size), 0);
ptr = memblock_virt_alloc_nopanic(PFN_ALIGN(ai_size), PAGE_SIZE);
if (!ptr)
return NULL;
ai = ptr;
@ -2714,6 +2714,7 @@ void __init setup_per_cpu_areas(void)
if (pcpu_setup_first_chunk(ai, fc) < 0)
panic("Failed to initialize percpu areas.");
pcpu_free_alloc_info(ai);
}
#endif /* CONFIG_SMP */