On Wed, Oct 23, 2019 at 12:55:14PM -0700, Ralph Campbell wrote: > If a device driver like nouveau tries to use hmm_range_fault() to access > the special shared zero page in system memory, hmm_range_fault() will > return -EFAULT and kill the process. > Allow hmm_range_fault() to return success (0) when the CPU pagetable > entry points to the special shared zero page. > page_to_pfn() and pfn_to_page() are defined on the zero page so just > handle it like any other page. > > Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx> > Cc: Christoph Hellwig <hch@xxxxxx> > Cc: "Jérôme Glisse" <jglisse@xxxxxxxxxx> > Cc: Jason Gunthorpe <jgg@xxxxxxxxxxxx> > --- > mm/hmm.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) Applied to hmm.git Thanks, Jason
