linux-kernel - Re: [PATCH] drm/panthor: Remove dead VM flushing code

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Message-ID: <9bcdf08d-eede-4bad-9445-fe0724eb7356@arm.com>
Date: Mon, 14 Jul 2025 16:58:53 +0100
From: Steven Price <steven.price@....com>
To: Adrián Larumbe <adrian.larumbe@...labora.com>,
 Boris Brezillon <boris.brezillon@...labora.com>,
 Liviu Dudau <liviu.dudau@....com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: kernel@...labora.com, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/panthor: Remove dead VM flushing code

On 11/07/2025 16:45, Adrián Larumbe wrote:
> Commit ec62d37d2c0d("drm/panthor: Fix the fast-reset logic") did away
> with the only reference to panthor_vm_flush_all(), so let's get rid
> of the orphaned definition.
> 
> Signed-off-by: Adrián Larumbe <adrian.larumbe@...labora.com>

Reviewed-by: Steven Price <steven.price@....com>

I'll push this to drm-misc-next.

Thanks,
Steve

> ---
>  drivers/gpu/drm/panthor/panthor_mmu.c | 11 -----------
>  drivers/gpu/drm/panthor/panthor_mmu.h |  1 -
>  2 files changed, 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c
> index b39ea6acc6a9..ed3712f8d6a9 100644
> --- a/drivers/gpu/drm/panthor/panthor_mmu.c
> +++ b/drivers/gpu/drm/panthor/panthor_mmu.c
> @@ -885,17 +885,6 @@ static int panthor_vm_flush_range(struct panthor_vm *vm, u64 iova, u64 size)
>  	return ret;
>  }
>  
> -/**
> - * panthor_vm_flush_all() - Flush L2 caches for the entirety of a VM's AS
> - * @vm: VM whose cache to flush
> - *
> - * Return: 0 on success, a negative error code if flush failed.
> - */
> -int panthor_vm_flush_all(struct panthor_vm *vm)
> -{
> -	return panthor_vm_flush_range(vm, vm->base.mm_start, vm->base.mm_range);
> -}
> -
>  static int panthor_vm_unmap_pages(struct panthor_vm *vm, u64 iova, u64 size)
>  {
>  	struct panthor_device *ptdev = vm->ptdev;
> diff --git a/drivers/gpu/drm/panthor/panthor_mmu.h b/drivers/gpu/drm/panthor/panthor_mmu.h
> index fc274637114e..0e268fdfdb2f 100644
> --- a/drivers/gpu/drm/panthor/panthor_mmu.h
> +++ b/drivers/gpu/drm/panthor/panthor_mmu.h
> @@ -33,7 +33,6 @@ int panthor_vm_active(struct panthor_vm *vm);
>  void panthor_vm_idle(struct panthor_vm *vm);
>  u32 panthor_vm_page_size(struct panthor_vm *vm);
>  int panthor_vm_as(struct panthor_vm *vm);
> -int panthor_vm_flush_all(struct panthor_vm *vm);
>  
>  struct panthor_heap_pool *
>  panthor_vm_get_heap_pool(struct panthor_vm *vm, bool create);