On 02/04/2016 06:56 AM, Joonsoo Kim wrote:
> We can disable debug_pagealloc processing even if the code is complied
> with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query
> whether it is enabled or not in runtime.
>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Reviewed-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
> mm/vmalloc.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index fb42a5b..e0e51bd 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -543,10 +543,10 @@ static void vmap_debug_free_range(unsigned long start, unsigned long end)
> * debugging doesn't do a broadcast TLB flush so it is a lot
> * faster).
> */
> -#ifdef CONFIG_DEBUG_PAGEALLOC
> - vunmap_page_range(start, end);
> - flush_tlb_kernel_range(start, end);
> -#endif
> + if (debug_pagealloc_enabled()) {
> + vunmap_page_range(start, end);
> + flush_tlb_kernel_range(start, end);
> + }
> }
>
> /*
>
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