This will allow sparc64 to override its ADI tags for get_user_pages and get_user_pages_fast. I have no idea why this is not required for plain old get_user_pages, but it keeps the existing sparc64 behavior. Signed-off-by: Christoph Hellwig <hch@xxxxxx> --- mm/gup.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/mm/gup.c b/mm/gup.c index f173fcbaf1b2..1c21ecfbf38b 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2117,6 +2117,10 @@ static void gup_pgd_range(unsigned long addr, unsigned long end, } while (pgdp++, addr = next, addr != end); } +#ifndef gup_fixup_start_addr +#define gup_fixup_start_addr(start) (start) +#endif + #ifndef gup_fast_permitted /* * Check if it's allowed to use __get_user_pages_fast() for the range, or @@ -2145,7 +2149,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, unsigned long flags; int nr = 0; - start &= PAGE_MASK; + start = gup_fixup_start_addr(start) & PAGE_MASK; len = (unsigned long) nr_pages << PAGE_SHIFT; end = start + len; @@ -2218,7 +2222,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, unsigned long addr, len, end; int nr = 0, ret = 0; - start &= PAGE_MASK; + start = gup_fixup_start_addr(start) & PAGE_MASK; addr = start; len = (unsigned long) nr_pages << PAGE_SHIFT; end = start + len; -- 2.20.1
