[PATCH 01/16] mm: use untagged_addr() for get_user_pages_fast addresses

[Christoph Hellwig]

This will allow sparc64 to override its ADI tags for
get_user_pages and get_user_pages_fast.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 mm/gup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index ddde097cf9e4..6bb521db67ec 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -2146,7 +2146,7 @@ int __get_user_pages_fast(unsigned long start, int 
nr_pages, int write,
        unsigned long flags;
        int nr = 0;
 
-       start &= PAGE_MASK;
+       start = untagged_addr(start) & PAGE_MASK;
        len = (unsigned long) nr_pages << PAGE_SHIFT;
        end = start + len;
 
@@ -2219,7 +2219,7 @@ 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 = untagged_addr(start) & PAGE_MASK;
        addr = start;
        len = (unsigned long) nr_pages << PAGE_SHIFT;
        end = start + len;
-- 
2.20.1