linux-kernel - Re: [PATCH v2] char: agp: Change return type to vm_fault

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Date:   Thu, 31 May 2018 10:38:13 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     airlied@...ux.ie, Arnd Bergmann <arnd@...db.de>,
        Greg KH <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v2] char: agp: Change return type to vm_fault_t

On Mon, May 21, 2018 at 11:47 PM, Souptick Joarder <jrdr.linux@...il.com> wrote:
> Use new return type vm_fault_t for fault handler. For now,
> this is just documenting that the function returns a
> VM_FAULT value rather than an errno. Once all instances are
> converted, vm_fault_t will become a distinct type.
>
> Ref-> commit 1c8f422059ae ("mm: change return type to
> vm_fault_t") was added in 4.17-rc1 to introduce the new
> typedef vm_fault_t. Currently we are making change to all
> drivers to return vm_fault_t for page fault handlers. As
> part of that char/agp driver is also getting changed to
> return vm_fault_t type from fault handler.
>
> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
> Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com>
> ---
>  drivers/char/agp/alpha-agp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/agp/alpha-agp.c b/drivers/char/agp/alpha-agp.c
> index 53fe633..c9bf2c2 100644
> --- a/drivers/char/agp/alpha-agp.c
> +++ b/drivers/char/agp/alpha-agp.c
> @@ -11,7 +11,7 @@
>
>  #include "agp.h"
>
> -static int alpha_core_agp_vm_fault(struct vm_fault *vmf)
> +static vm_fault_t alpha_core_agp_vm_fault(struct vm_fault *vmf)
>  {
>         alpha_agp_info *agp = agp_bridge->dev_private_data;
>         dma_addr_t dma_addr;
> --
> 1.9.1
>

Any comment for this patch ?