On 4/23/2021 3:31 AM, Kirill A. Shutemov wrote:

On Thu, Apr 15, 2021 at 03:14:10PM -0700, Yu-cheng Yu wrote:

quoted

There was no more caller passing vm_flags to do_mmap(), and vm_flags was
removed from the function's input by:

     commit 45e55300f114 ("mm: remove unnecessary wrapper function do_mmap_pgoff()").

There is a new user now.  Shadow stack allocation passes VM_SHADOW_STACK to
do_mmap().  Thus, re-introduce vm_flags to do_mmap().

Signed-off-by: Yu-cheng Yu <redacted>
Reviewed-by: Peter Collingbourne <redacted>
Reviewed-by: Kees Cook <redacted>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: linux-mm@kvack.org

Reviewed-by: Kirill A. Shutemov <redacted>

Thanks for reviewing.

Yu-cheng