linux-kernel - [PATCH] drm: Fix misleading documentation of drm_gem_cma

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Message-Id: <20210601095405.8975-1-paul@crapouillou.net>
Date:   Tue,  1 Jun 2021 10:54:05 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        list@...ndingux.net,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH] drm: Fix misleading documentation of drm_gem_cma_create()

The backing memory does not necessarily have the writecombine attribute
set, since commit cf8ccbc72d61 ("drm: Add support for GEM buffers backed
by non-coherent memory").

Fixes: cf8ccbc72d61 ("drm: Add support for GEM buffers backed by non-coherent memory")
Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/gpu/drm/drm_gem_cma_helper.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 4a24af2c5c43..d53388199f34 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -104,8 +104,7 @@ __drm_gem_cma_create(struct drm_device *drm, size_t size, bool private)
  * @size: size of the object to allocate
  *
  * This function creates a CMA GEM object and allocates a contiguous chunk of
- * memory as backing store. The backing memory has the writecombine attribute
- * set.
+ * memory as backing store.
  *
  * Returns:
  * A struct drm_gem_cma_object * on success or an ERR_PTR()-encoded negative
-- 
2.30.2