Re: [PATCH v2] misc: sgi-gru: Change return type to vm_fault_t

From: Dimitri Sivanich
Date: Wed May 09 2018 - 15:47:05 EST


Acked-by: Dimitri Sivanich <sivanich@xxxxxxx>

On Wed, Apr 25, 2018 at 10:20:44AM +0530, Souptick Joarder 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.
>
> Commit 1c8f422059ae ("mm: change return type to vm_fault_t")
>
> Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
> Reviewed-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
> ---
> v2: Updated the change log
>
> drivers/misc/sgi-gru/grumain.c | 2 +-
> drivers/misc/sgi-gru/grutables.h | 3 ++-
> 2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
> index 3641f13..ab174f28 100644
> --- a/drivers/misc/sgi-gru/grumain.c
> +++ b/drivers/misc/sgi-gru/grumain.c
> @@ -926,7 +926,7 @@ struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts)
> *
> * Note: gru segments alway mmaped on GRU_GSEG_PAGESIZE boundaries.
> */
> -int gru_fault(struct vm_fault *vmf)
> +vm_fault_t gru_fault(struct vm_fault *vmf)
> {
> struct vm_area_struct *vma = vmf->vma;
> struct gru_thread_state *gts;
> diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
> index b5e308b..3e041b6 100644
> --- a/drivers/misc/sgi-gru/grutables.h
> +++ b/drivers/misc/sgi-gru/grutables.h
> @@ -147,6 +147,7 @@
> #include <linux/mutex.h>
> #include <linux/wait.h>
> #include <linux/mmu_notifier.h>
> +#include <linux/mm_types.h>
> #include "gru.h"
> #include "grulib.h"
> #include "gruhandles.h"
> @@ -665,7 +666,7 @@ extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
> int cbr_au_count, char *cbmap);
> extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
> int dsr_au_count, char *dsmap);
> -extern int gru_fault(struct vm_fault *vmf);
> +extern vm_fault_t gru_fault(struct vm_fault *vmf);
> extern struct gru_mm_struct *gru_register_mmu_notifier(void);
> extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
>
> --
> 1.9.1
>