On 6/11/19 8:40 AM, Christoph Hellwig wrote: > This will allow sparc64 to override its ADI tags for > get_user_pages and get_user_pages_fast. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > --- Commit message is sparc64 specific but the goal here is to allow any architecture with memory tagging to use this. So I would suggest rewording the commit log. Other than that: Reviewed-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx> > 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; >
