diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0540-drm-vc4-Use-drm_gem_object_unreference_unlocked.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0540-drm-vc4-Use-drm_gem_object_unreference_unlocked.patch | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0540-drm-vc4-Use-drm_gem_object_unreference_unlocked.patch b/target/linux/brcm2708/patches-4.4/0540-drm-vc4-Use-drm_gem_object_unreference_unlocked.patch deleted file mode 100644 index f3ff1c530c..0000000000 --- a/target/linux/brcm2708/patches-4.4/0540-drm-vc4-Use-drm_gem_object_unreference_unlocked.patch +++ /dev/null @@ -1,76 +0,0 @@ -From 26b1bf12a8ed92c1f97b3da7919056c888e1e49d Mon Sep 17 00:00:00 2001 -From: Daniel Vetter <daniel.vetter@ffwll.ch> -Date: Mon, 30 May 2016 19:53:06 +0200 -Subject: [PATCH] drm/vc4: Use drm_gem_object_unreference_unlocked - -Since my last struct_mutex crusade someone escaped! - -This already has the advantage that for the common case when someone -else holds a ref the unref won't even acquire dev->struct_mutex. And -I'm working on code to allow drivers to completely opt-out of any and -all dev->struct_mutex usage, but that only works if they use the -_unlocked variants everywhere. - -v2: Drop comment too. - -v3: Drop the other comment too. - -Cc: Eric Anholt <eric@anholt.net> -Reviewed-by: Eric Anholt <eric@anholt.net> -Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> -Link: http://patchwork.freedesktop.org/patch/msgid/1464630800-30786-15-git-send-email-daniel.vetter@ffwll.ch -(cherry picked from commit db3697295cf4da1356e3ec86761d464d6d013b48) ---- - drivers/gpu/drm/vc4/vc4_bo.c | 2 -- - drivers/gpu/drm/vc4/vc4_gem.c | 11 +++-------- - 2 files changed, 3 insertions(+), 10 deletions(-) - ---- a/drivers/gpu/drm/vc4/vc4_bo.c -+++ b/drivers/gpu/drm/vc4/vc4_bo.c -@@ -311,8 +311,6 @@ static void vc4_bo_cache_free_old(struct - - /* Called on the last userspace/kernel unreference of the BO. Returns - * it to the BO cache if possible, otherwise frees it. -- * -- * Note that this is called with the struct_mutex held. - */ - void vc4_free_object(struct drm_gem_object *gem_bo) - { ---- a/drivers/gpu/drm/vc4/vc4_gem.c -+++ b/drivers/gpu/drm/vc4/vc4_gem.c -@@ -67,10 +67,8 @@ vc4_free_hang_state(struct drm_device *d - { - unsigned int i; - -- mutex_lock(&dev->struct_mutex); - for (i = 0; i < state->user_state.bo_count; i++) -- drm_gem_object_unreference(state->bo[i]); -- mutex_unlock(&dev->struct_mutex); -+ drm_gem_object_unreference_unlocked(state->bo[i]); - - kfree(state); - } -@@ -711,11 +709,9 @@ vc4_complete_exec(struct drm_device *dev - struct vc4_dev *vc4 = to_vc4_dev(dev); - unsigned i; - -- /* Need the struct lock for drm_gem_object_unreference(). */ -- mutex_lock(&dev->struct_mutex); - if (exec->bo) { - for (i = 0; i < exec->bo_count; i++) -- drm_gem_object_unreference(&exec->bo[i]->base); -+ drm_gem_object_unreference_unlocked(&exec->bo[i]->base); - kfree(exec->bo); - } - -@@ -723,9 +719,8 @@ vc4_complete_exec(struct drm_device *dev - struct vc4_bo *bo = list_first_entry(&exec->unref_list, - struct vc4_bo, unref_head); - list_del(&bo->unref_head); -- drm_gem_object_unreference(&bo->base.base); -+ drm_gem_object_unreference_unlocked(&bo->base.base); - } -- mutex_unlock(&dev->struct_mutex); - - mutex_lock(&vc4->power_lock); - if (--vc4->power_refcount == 0) { |