On Wed, 8 Apr 2020 13:59:00 +0200
>
> vm_map_ram can keep mappings around after the vm_unmap_ram. Using that
> with non-PAGE_KERNEL mappings can lead to all kinds of aliasing issues.
>
> Signed-off-by: Christoph Hellwig
> ---
> drivers/staging/android/ion/ion_heap.c | 4 ++--
> 1 file
>
> Hi Hillf,
>
> Would you like to me to put you down as the author of this patch? If so, I'll
> need a Signed-off-by from you.
>
Signed-off-by: Hillf Danton
David Howells wrote:
>> 1, callee has no pre defined duty to help caller in general; they should not
>> try to do anything, however, to help their callers in principle due to
>> limited info on their hands IMO.
>
> Ah, no. It's entirely reasonable for an API to specify that one of its
> methods
David Howells wrote:
>
> Hillf Danton wrote:
>
> > - struct request_key_auth *rka = dereference_key_rcu(key);
> > + struct request_key_auth *rka;
> > +
> > + rcu_read_lock();
> > + rka = dereference_key_rcu(key);
>
> This shouldn't help as the
On Fri, 30 Aug 2019 12:18:07 +0530 Sachin Sant wrote:
>
> [ 8074.351033] BUG: Kernel NULL pointer dereference at 0x0038
> [ 8074.351046] Faulting instruction address: 0xc04ddf30
> [ 8074.351052] Oops: Kernel access of bad area, sig: 11 [#1]
> [ 8074.351056] LE PAGE_SIZE=64K MMU=Hash
On Monday, November 07, 2016 4:35 PM Aneesh Kumar K.V
>
> Architectures like ppc64 want to use page table deposit/withraw
> even with huge pmd dax entries. Allow arch to override the
> vma_is_anonymous check by moving that to pmd_move_must_withdraw
> function
>
> Signed-off-by: Aneesh Kumar K.V
> on ppc64 such pte_same check returned wrong result, resulting in us
> taking an additional fault on ppc64.
>
> Fixes: 6a119eae942c ("powerpc/mm: Add a _PAGE_PTE bit")
>
> Reported-by: Jan Stancek <jstan...@redhat.com>
> Signed-off-by: Aneesh Kumar K.V <a
