try_grab_folio_fast() was used in gup_hugepte(), while itself was defined after gup_hugepte(), so add a forward declaration to eliminate the -Wimplicit-function-declaration warning. Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202407010039.D3sIu3fu-lkp@xxxxxxxxx/ Signed-off-by: Zhao Mengmeng <zhaomengmeng@xxxxxxxxxx> --- mm/gup.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/gup.c b/mm/gup.c index 7439359d0b71..222b83a87d7d 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -488,6 +488,9 @@ static unsigned long hugepte_addr_end(unsigned long addr, unsigned long end, return (__boundary - 1 < end - 1) ? __boundary : end; } +static struct folio *try_grab_folio_fast(struct page *page, int refs, + unsigned int flags); + /* * Returns 1 if succeeded, 0 if failed, -EMLINK if unshare needed. * -- 2.33.0
