Messages in this thread | | | Date | Thu, 24 Sep 2009 15:09:25 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] NOMMU: Fix MAP_PRIVATE mmap() of objects where the data can be mapped directly |
| |
On Thu, 24 Sep 2009 15:13:10 +0100 David Howells <dhowells@redhat.com> wrote:
> Fix MAP_PRIVATE mmap() of files and devices where the data in the backing store > might be mapped directly. Use the BDI_CAP_MAP_DIRECT capability flag to govern > whether or not we should be trying to map a file directly. This can be used to > determine whether or not a region has been filled in at the point where we call > do_mmap_shared() or do_mmap_private(). > > The BDI_CAP_MAP_DIRECT capability flag is cleared by validate_mmap_request() if > there's any reason we can't use it. It's also cleared in do_mmap_pgoff() if > f_op->get_unmapped_area() fails. >
The patch seems -stable-worthy but I see no cc:stable here?
> Note that this fix does the following commit differently: > > commit a190887b58c32d19c2eee007c5eb8faa970a69ba > Author: David Howells <dhowells@redhat.com> > Date: Sat Sep 5 11:17:07 2009 -0700 > nommu: fix error handling in do_mmap_pgoff()
I don't understand what you're saying here.
> Reported-by: Graff Yang <graff.yang@gmail.com> > Signed-off-by: David Howells <dhowells@redhat.com> > Cc: Pekka Enberg <penberg@cs.helsinki.fi> > Cc: Paul Mundt <lethal@linux-sh.org> > Cc: Mel Gorman <mel@csn.ul.ie> > Cc: Greg Ungerer <gerg@snapgear.com>
| |