* [PATCH] powerpc: Don't provide __kernel_map_pages() without ARCH_SUPPORTS_DEBUG_PAGEALLOC
@ 2021-10-28 12:59 Christophe Leroy
2021-11-02 10:12 ` Michael Ellerman
0 siblings, 1 reply; 2+ messages in thread
From: Christophe Leroy @ 2021-10-28 12:59 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
Cc: linuxppc-dev, linux-kernel, kernel test robot
When ARCH_SUPPORTS_DEBUG_PAGEALLOC is not selected, the user can
still select CONFIG_DEBUG_PAGEALLOC in which case __kernel_map_pages()
is provided by mm/page_poison.c
So only define __kernel_map_pages() when both
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC and CONFIG_DEBUG_PAGEALLOC
are defined.
Fixes: 68b44f94d637 ("powerpc/booke: Disable STRICT_KERNEL_RWX, DEBUG_PAGEALLOC and KFENCE")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/mm/pgtable_32.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index dcf5ecca19d9..fde1ed445ca4 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -173,7 +173,7 @@ void mark_rodata_ro(void)
}
#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
+#if defined(CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC) && defined(CONFIG_DEBUG_PAGEALLOC)
void __kernel_map_pages(struct page *page, int numpages, int enable)
{
unsigned long addr = (unsigned long)page_address(page);
--
2.31.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] powerpc: Don't provide __kernel_map_pages() without ARCH_SUPPORTS_DEBUG_PAGEALLOC
2021-10-28 12:59 [PATCH] powerpc: Don't provide __kernel_map_pages() without ARCH_SUPPORTS_DEBUG_PAGEALLOC Christophe Leroy
@ 2021-11-02 10:12 ` Michael Ellerman
0 siblings, 0 replies; 2+ messages in thread
From: Michael Ellerman @ 2021-11-02 10:12 UTC (permalink / raw)
To: Michael Ellerman, Paul Mackerras, Christophe Leroy,
Benjamin Herrenschmidt
Cc: linuxppc-dev, kernel test robot, linux-kernel
On Thu, 28 Oct 2021 14:59:15 +0200, Christophe Leroy wrote:
> When ARCH_SUPPORTS_DEBUG_PAGEALLOC is not selected, the user can
> still select CONFIG_DEBUG_PAGEALLOC in which case __kernel_map_pages()
> is provided by mm/page_poison.c
>
> So only define __kernel_map_pages() when both
> CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC and CONFIG_DEBUG_PAGEALLOC
> are defined.
>
> [...]
Applied to powerpc/next.
[1/1] powerpc: Don't provide __kernel_map_pages() without ARCH_SUPPORTS_DEBUG_PAGEALLOC
https://git.kernel.org/powerpc/c/f8c0e36b48e32b14bb83332d24e0646acd31d9e9
cheers
^ permalink raw reply [flat|nested] 2+ messages in thread
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