On 5/19/21 5:28 PM, Krzysztof Kozlowski wrote:
> The documentation of DEBUG_PAGEALLOC states that it cannot be used with
> hibernation, however the Kconfig entry would allow it if
> ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC.
>
> Fixes: ee3b4290aec0 ("generic debug pagealloc: build fix")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
Hmm the documentation seems wrong, as going through history it was indeed in
conflict only on PPC and SPARC.
> ---
> mm/Kconfig.debug | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
> index 1e73717802f8..0ace5b2a9d04 100644
> --- a/mm/Kconfig.debug
> +++ b/mm/Kconfig.debug
> @@ -11,7 +11,7 @@ config PAGE_EXTENSION
> config DEBUG_PAGEALLOC
> bool "Debug page memory allocations"
> depends on DEBUG_KERNEL
> - depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
> + depends on !HIBERNATION && ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
> select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
> help
> Unmap pages from the kernel linear mapping after free_pages().
>
