[PATCH 02/14] mm: page_poison: always declare __kernel_map_pages() function
From: Arnd Bergmann <arnd@kernel.org>
Date: 2023-05-17 13:12:05
Also in:
linux-arm-kernel, linux-kselftest, linux-mips, linux-mm, linux-pm, linux-riscv, linux-s390, linux-sh, lkml
Subsystem:
memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
From: Arnd Bergmann <arnd@arndb.de> The __kernel_map_pages() function is mainly used for CONFIG_DEBUG_PAGEALLOC, but has a number of architecture specific definitions that may also be used in other configurations, as well as a global fallback definition for architectures that do not support DEBUG_PAGEALLOC. When the option is disabled, any definitions without the prototype cause a warning: mm/page_poison.c:102:6: error: no previous prototype for '__kernel_map_pages' [-Werror=missing-prototypes] The function is a trivial nop here, so just declare it anyway to avoid the warning. Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- include/linux/mm.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 27ce77080c79..e95d7c575ea6 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -3453,13 +3453,12 @@ static inline bool debug_pagealloc_enabled_static(void) return static_branch_unlikely(&_debug_pagealloc_enabled); } -#ifdef CONFIG_DEBUG_PAGEALLOC /* * To support DEBUG_PAGEALLOC architecture must ensure that * __kernel_map_pages() never fails */ extern void __kernel_map_pages(struct page *page, int numpages, int enable); - +#ifdef CONFIG_DEBUG_PAGEALLOC static inline void debug_pagealloc_map_pages(struct page *page, int numpages) { if (debug_pagealloc_enabled_static())
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2.39.2