From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
To: Christoph Hellwig <hch@lst.de>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Juergen Gross <jgross@suse.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
dri-devel@lists.freedesktop.org, linux-mm@kvack.org,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
x86@kernel.org, Chris Wilson <chris@chris-wilson.co.uk>,
Minchan Kim <minchan@kernel.org>,
Matthew Auld <matthew.auld@intel.com>,
xen-devel@lists.xenproject.org,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Nitin Gupta <ngupta@vflare.org>
Subject: Re: [Intel-gfx] [PATCH 07/11] drm/i915: stop using kmap in i915_gem_object_map
Date: Fri, 25 Sep 2020 14:01:59 +0100 [thread overview]
Message-ID: <8d318fcb-f472-85ed-6639-18f9c45f30e4@linux.intel.com> (raw)
In-Reply-To: <20200924135853.875294-8-hch@lst.de>
On 24/09/2020 14:58, Christoph Hellwig wrote:
> kmap for !PageHighmem is just a convoluted way to say page_address,
> and kunmap is a no-op in that case.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/gpu/drm/i915/gem/i915_gem_pages.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
> index d6eeefab3d018b..6550c0bc824ea2 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
> @@ -162,8 +162,6 @@ static void unmap_object(struct drm_i915_gem_object *obj, void *ptr)
> {
> if (is_vmalloc_addr(ptr))
> vunmap(ptr);
> - else
> - kunmap(kmap_to_page(ptr));
> }
>
> struct sg_table *
> @@ -277,11 +275,10 @@ static void *i915_gem_object_map(struct drm_i915_gem_object *obj,
> * forever.
> *
> * So if the page is beyond the 32b boundary, make an explicit
> - * vmap. On 64b, this check will be optimised away as we can
> - * directly kmap any page on the system.
> + * vmap.
> */
> if (!PageHighMem(page))
> - return kmap(page);
> + return page_address(page);
> }
>
> mem = stack;
>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Regards,
Tvrtko
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next prev parent reply other threads:[~2020-09-25 13:02 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-24 13:58 [Intel-gfx] remove alloc_vm_area v2 Christoph Hellwig
2020-09-24 13:58 ` [Intel-gfx] [PATCH 01/11] mm: update the documentation for vfree Christoph Hellwig
2020-09-24 13:58 ` [Intel-gfx] [PATCH 02/11] mm: add a VM_MAP_PUT_PAGES flag for vmap Christoph Hellwig
2020-09-24 13:58 ` [Intel-gfx] [PATCH 03/11] mm: add a vmap_pfn function Christoph Hellwig
2020-09-24 13:58 ` [Intel-gfx] [PATCH 04/11] mm: allow a NULL fn callback in apply_to_page_range Christoph Hellwig
2020-09-24 13:58 ` [Intel-gfx] [PATCH 05/11] zsmalloc: switch from alloc_vm_area to get_vm_area Christoph Hellwig
2020-09-24 13:58 ` [Intel-gfx] [PATCH 06/11] drm/i915: use vmap in shmem_pin_map Christoph Hellwig
2020-09-25 13:05 ` Tvrtko Ursulin
2020-09-24 13:58 ` [Intel-gfx] [PATCH 07/11] drm/i915: stop using kmap in i915_gem_object_map Christoph Hellwig
2020-09-25 13:01 ` Tvrtko Ursulin [this message]
2020-09-24 13:58 ` [Intel-gfx] [PATCH 08/11] drm/i915: use vmap " Christoph Hellwig
2020-09-25 13:11 ` Tvrtko Ursulin
2020-09-25 14:08 ` Matthew Auld
2020-09-25 16:02 ` Christoph Hellwig
2020-09-25 16:09 ` [Intel-gfx] [PATCH 08/11, fixed] " Christoph Hellwig
2020-09-24 13:58 ` [Intel-gfx] [PATCH 09/11] xen/xenbus: use apply_to_page_range directly in xenbus_map_ring_pv Christoph Hellwig
2020-09-24 23:42 ` boris.ostrovsky
2020-09-24 13:58 ` [Intel-gfx] [PATCH 10/11] x86/xen: open code alloc_vm_area in arch_gnttab_valloc Christoph Hellwig
2020-09-24 23:43 ` boris.ostrovsky
2020-09-24 13:58 ` [Intel-gfx] [PATCH 11/11] mm: remove alloc_vm_area Christoph Hellwig
2020-09-24 15:09 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [01/11] mm: update the documentation for vfree Patchwork
2020-09-24 15:34 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-09-24 20:44 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2020-09-25 16:50 ` [Intel-gfx] ✓ Fi.CI.BAT: success for series starting with [01/11] mm: update the documentation for vfree (rev2) Patchwork
2020-09-26 0:08 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2020-09-26 2:43 ` [Intel-gfx] remove alloc_vm_area v2 Andrew Morton
2020-09-26 6:29 ` Christoph Hellwig
2020-09-28 10:13 ` Joonas Lahtinen
2020-09-28 12:37 ` Christoph Hellwig
2020-09-29 12:43 ` Joonas Lahtinen
2020-09-30 14:48 ` Christoph Hellwig
2020-09-30 18:37 ` Daniel Vetter
2020-10-02 12:21 [Intel-gfx] remove alloc_vm_area v4 Christoph Hellwig
2020-10-02 12:22 ` [Intel-gfx] [PATCH 07/11] drm/i915: stop using kmap in i915_gem_object_map Christoph Hellwig
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