linux-kernel - Re: [PATCH] gpu: drm: vgem: Change return type to vm_fault_t

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Message-ID: <CAFqt6zZo2QFnAhS97cw52kDYUyzA+6AxRXPXcjNskHTJQhnXmQ@mail.gmail.com>
Date:   Thu, 24 May 2018 19:51:40 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     Souptick Joarder <jrdr.linux@...il.com>,
        Sean Paul <seanpaul@...omium.org>,
        linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] gpu: drm: vgem: Change return type to vm_fault_t

On Thu, May 24, 2018 at 6:27 PM, Daniel Vetter <daniel@...ll.ch> wrote:
> On Wed, May 23, 2018 at 03:05:35PM +0530, Souptick Joarder wrote:
>> On Mon, May 14, 2018 at 9:56 PM, Daniel Vetter <daniel@...ll.ch> wrote:
>> > On Thu, May 10, 2018 at 02:51:38PM -0400, Sean Paul wrote:
>> >> On Thu, May 10, 2018 at 07:58:11PM +0530, Souptick Joarder wrote:
>> >> > Hi Sean,
>> >> >
>> >> > On Mon, Apr 16, 2018 at 8:32 PM, Souptick Joarder <jrdr.linux@...il.com> wrote:
>> >> > > Use new return type vm_fault_t for fault handler.
>> >> > >
>> >> > > Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
>> >> > > Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com>
>> >> > > ---
>> >> > >  drivers/gpu/drm/vgem/vgem_drv.c | 5 ++---
>> >> > >  1 file changed, 2 insertions(+), 3 deletions(-)
>> >> > >
>> >> > > diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
>> >> > > index 2524ff1..c64a859 100644
>> >> > > --- a/drivers/gpu/drm/vgem/vgem_drv.c
>> >> > > +++ b/drivers/gpu/drm/vgem/vgem_drv.c
>> >> > > @@ -61,13 +61,13 @@ static void vgem_gem_free_object(struct drm_gem_object *obj)
>> >> > >         kfree(vgem_obj);
>> >> > >  }
>> >> > >
>> >> > > -static int vgem_gem_fault(struct vm_fault *vmf)
>> >> > > +static vm_fault_t vgem_gem_fault(struct vm_fault *vmf)
>> >> > >  {
>> >> > >         struct vm_area_struct *vma = vmf->vma;
>> >> > >         struct drm_vgem_gem_object *obj = vma->vm_private_data;
>> >> > >         /* We don't use vmf->pgoff since that has the fake offset */
>> >> > >         unsigned long vaddr = vmf->address;
>> >> > > -       int ret;
>> >> > > +       vm_fault_t ret = VM_FAULT_SIGBUS;
>> >> > >         loff_t num_pages;
>> >> > >         pgoff_t page_offset;
>> >> > >         page_offset = (vaddr - vma->vm_start) >> PAGE_SHIFT;
>> >> > > @@ -77,7 +77,6 @@ static int vgem_gem_fault(struct vm_fault *vmf)
>> >> > >         if (page_offset > num_pages)
>> >> > >                 return VM_FAULT_SIGBUS;
>> >> > >
>> >> > > -       ret = -ENOENT;
>> >> > >         mutex_lock(&obj->pages_lock);
>> >> > >         if (obj->pages) {
>> >> > >                 get_page(obj->pages[page_offset]);
>> >> > > --
>> >> > > 1.9.1
>> >> > >
>> >> >
>> >> > Any further comment on this patch ?
>> >>
>> >> Patch looks good to me. My build test fails, though, since vm_fault_t doesn't
>> >> exist in drm-misc-next yet.
>> >
>> > vm_fault_t is already in upstream, just needs Maarten to do a backmerge.
>> > Which I think he's done by now ... Otherwise nag him more :-)
>> > -Daniel
>> >
>> >>
>> >> So, for now,
>> >>
>> >> Reviewed-by: Sean Paul <seanpaul@...omium.org>
>> >>
>> >>
>> >> --
>> >> Sean Paul, Software Engineer, Google / Chromium OS
>> >> _______________________________________________
>> >> dri-devel mailing list
>> >> dri-devel@...ts.freedesktop.org
>> >> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>> >
>> > --
>> > Daniel Vetter
>> > Software Engineer, Intel Corporation
>> > http://blog.ffwll.ch
>>
>> Daniel/ Sean, is this patch already merged for 4.18 ?
>
> Nope, fell through the cracks. Thanks for the reminder, queued for 4.18
> now.
> -Daniel

Thanks Daniel :).
Few other similar drm driver patches are also candidates
for 4.18. Are you the right Maintainer to make a request
for the same ?

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