Messages in this thread Patch in this message | | | From | Souptick Joarder <> | Subject | [PATCH] mm: add prototype for __add_to_page_cache_locked() | Date | Wed, 23 Dec 2020 08:46:18 +0530 |
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Otherwise it causes a gcc warning:
../mm/filemap.c:830:14: warning: no previous prototype for `__add_to_page_cache_locked' [-Wmissing-prototypes]
A previous attempt to make this function static led to compilation errors when CONFIG_DEBUG_INFO_BTF is enabled because __add_to_page_cache_locked() is referred to by BPF code.
Adding a prototype will silence the warning.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Cc: Alex Shi <alex.shi@linux.alibaba.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Matthew Wilcox <willy@infradead.org> --- include/linux/mm.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h index 5299b90a..c1e9081 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -216,6 +216,13 @@ int overcommit_kbytes_handler(struct ctl_table *, int, void *, size_t *, loff_t *); int overcommit_policy_handler(struct ctl_table *, int, void *, size_t *, loff_t *); +/* + * Any attempt to mark this function as static leads to build failure + * when CONFIG_DEBUG_INFO_BTF is enabled because __add_to_page_cache_locked() + * is referred to by BPF code. This must be visible for error injection. + */ +int __add_to_page_cache_locked(struct page *page, struct address_space *mapping, + pgoff_t index, gfp_t gfp, void **shadowp); #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n)) -- 1.9.1
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