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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: DRI Development <dri-devel@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	Daniel Vetter <daniel.vetter@intel.com>
Subject: [PATCH 15/29] drm/tegra: Use drm_gem_object_unreference_unlocked
Date: Mon, 23 Nov 2015 10:32:48 +0100	[thread overview]
Message-ID: <1448271183-20523-16-git-send-email-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <1448271183-20523-1-git-send-email-daniel.vetter@ffwll.ch>

This only grabs the mutex when really needed, but still has a
might-acquire lockdep check to make sure that's always possible.
With this patch tegra is officially struct_mutex free, yay!

v2: refernce_unlocked doesn't exist as kbuild spotted.

Cc: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/tegra/drm.c | 4 +---
 drivers/gpu/drm/tegra/gem.c | 6 +-----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 3479c57151af..34d067b677bd 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -277,9 +277,7 @@ host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
 	if (!gem)
 		return NULL;
 
-	mutex_lock(&drm->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&drm->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 
 	bo = to_tegra_bo(gem);
 	return &bo->base;
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index fb712316c522..fbec29516bcb 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -30,9 +30,7 @@ static void tegra_bo_put(struct host1x_bo *bo)
 	struct tegra_bo *obj = host1x_to_tegra_bo(bo);
 	struct drm_device *drm = obj->gem.dev;
 
-	mutex_lock(&drm->struct_mutex);
-	drm_gem_object_unreference(&obj->gem);
-	mutex_unlock(&drm->struct_mutex);
+	drm_gem_object_unreference_unlocked(&obj->gem);
 }
 
 static dma_addr_t tegra_bo_pin(struct host1x_bo *bo, struct sg_table **sgt)
@@ -74,9 +72,7 @@ static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo)
 	struct tegra_bo *obj = host1x_to_tegra_bo(bo);
 	struct drm_device *drm = obj->gem.dev;
 
-	mutex_lock(&drm->struct_mutex);
 	drm_gem_object_reference(&obj->gem);
-	mutex_unlock(&drm->struct_mutex);
 
 	return bo;
 }
-- 
2.5.1

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  parent reply	other threads:[~2015-11-23  9:33 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-23  9:32 [PATCH 00/29] dev->struct_mutex crusade, once more Daniel Vetter
2015-11-23  9:32 ` [PATCH 01/29] drm/armada: Use unlocked gem unreferencing Daniel Vetter
2015-11-23  9:32 ` [PATCH 02/29] drm/nouveau: " Daniel Vetter
2015-11-23  9:32 ` [PATCH 03/29] drm/omapdrm: " Daniel Vetter
2015-11-23  9:32 ` [PATCH 04/29] drm/amdgpu: " Daniel Vetter
2015-11-23  9:56   ` Christian König
2015-11-23  9:32 ` [PATCH 05/29] drm/radeon: " Daniel Vetter
2015-11-23  9:32 ` [PATCH 06/29] drm/qxl: " Daniel Vetter
2015-11-23  9:32 ` [PATCH 07/29] drm/tegra: " Daniel Vetter
2015-11-23 10:00   ` Thierry Reding
2015-11-23  9:32 ` [PATCH 08/29] drm/msm: " Daniel Vetter
2015-11-23  9:32 ` [PATCH 09/29] drm/udl: " Daniel Vetter
2015-11-23  9:32 ` [PATCH 10/29] drm/armada: Plug leak in dumb_map_offset Daniel Vetter
2015-11-23  9:32 ` [PATCH 11/29] drm/armada: Don't grab dev->struct_mutex for in mmap offset ioctl Daniel Vetter
2015-11-23  9:32 ` [PATCH 12/29] drm/armada: Drop struct_mutex from cursor paths Daniel Vetter
2015-12-03 16:08   ` Russell King - ARM Linux
2015-12-04  7:51     ` Daniel Vetter
2015-11-23  9:32 ` [PATCH 13/29] drm/armada: Use a private mutex to protect priv->linear Daniel Vetter
2015-11-23 17:40   ` Russell King - ARM Linux
2015-11-23 20:17     ` Daniel Vetter
2015-11-24  9:00   ` [PATCH] " Daniel Vetter
2015-11-23  9:32 ` [PATCH 14/29] drm/tegra: don't take dev->struct_mutex in mmap offset ioctl Daniel Vetter
2015-11-23 10:00   ` Thierry Reding
2015-11-23  9:32 ` Daniel Vetter [this message]
2015-11-23 10:01   ` [PATCH 15/29] drm/tegra: Use drm_gem_object_unreference_unlocked Thierry Reding
2015-11-23  9:32 ` [PATCH 16/29] drm/gma500: Use correct unref in the gem bo create function Daniel Vetter
2015-11-23  9:32 ` [PATCH 17/29] drm/gma500: Drop dev->struct_mutex from modeset code Daniel Vetter
2015-11-23  9:32 ` [PATCH 18/29] drm/gma500: Drop dev->struct_mutex from fbdev init/teardown code Daniel Vetter
2015-11-23  9:32 ` [PATCH 19/29] drm/gma500: Drop dev->struct_mutex from mmap offset function Daniel Vetter
2015-11-23  9:32 ` [PATCH 20/29] drm/gma500: Add driver private mutex for the fault handler Daniel Vetter
2015-11-23  9:32 ` [PATCH 21/29] drm/nouveau: Drop dev->struct_mutex from fbdev init Daniel Vetter
2015-11-23  9:32 ` [PATCH 22/29] drm/exynos: Drop dev->struct_mutex from mmap offset function Daniel Vetter
2015-11-23 10:00   ` Daniel Stone
2015-11-23  9:32 ` [PATCH 23/29] drm/exynos: drop struct_mutex from exynos_gem_map_sgt_with_dma Daniel Vetter
2015-11-23 10:01   ` Daniel Stone
2015-11-23  9:32 ` [PATCH 24/29] drm/exynos: drop struct_mutex from exynos_drm_gem_get_ioctl Daniel Vetter
2015-11-23 10:00   ` Daniel Stone
2015-11-23  9:32 ` [PATCH 25/29] drm/exynos: drop struct_mutex from fbdev setup Daniel Vetter
2015-11-23  9:59   ` Daniel Stone
2015-11-23  9:32 ` [PATCH 26/29] drm/vgem: Simplify dum_map Daniel Vetter
2015-11-23  9:33 ` [PATCH 27/29] drm/vgem: Move get_pages to gem_create Daniel Vetter
2016-01-05 15:52   ` poma
2015-11-23  9:33 ` [PATCH 28/29] drm/vgem: Drop dev->struct_mutex Daniel Vetter
2015-11-23  9:33 ` [PATCH 29/29] drm/vma_manage: Drop has_offset Daniel Vetter
2015-11-23  9:33 ` [PATCH] v2: Also add a DRIVER_* check like for all other maps functions to really short-circuit the code. And give drm_legacy_rmmap used by the dev unregister code the same treatment Daniel Vetter
2015-11-23 10:15   ` [Intel-gfx] " Jani Nikula
2015-11-23 10:13     ` Daniel Vetter
2015-12-07  8:14 ` [PATCH 00/29] dev->struct_mutex crusade, once more Daniel Vetter

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