xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dma-buf/sw-sync: Reduce irqsave/irqrestore from known context

Browse Source 
If we know the context under which we are called, then we can use the
simpler form of spin_lock_irq (saving the save/restore).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2017-06-29 13:59:27 +01:00
committed by Gustavo Padovan
parent 8f66d3aa17
commit a6aa8fca4d
2 changed files with 15 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/dma-buf/sw_sync.c
View File

@@ -135,12 +135,11 @@ static void sync_timeline_put(struct sync_timeline *obj)
*/
static void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
{
unsigned long flags;
struct sync_pt *pt, *next;
trace_sync_timeline(obj);
spin_lock_irqsave(&obj->child_list_lock, flags);
spin_lock_irq(&obj->child_list_lock);
obj->value += inc;
@@ -150,7 +149,7 @@ static void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
list_del_init(&pt->active_list);
}
spin_unlock_irqrestore(&obj->child_list_lock, flags);
spin_unlock_irq(&obj->child_list_lock);
}
/**
@@ -167,7 +166,6 @@ static void sync_timeline_signal(struct sync_timeline *obj, unsigned int inc)
static struct sync_pt *sync_pt_create(struct sync_timeline *obj, int size,
unsigned int value)
{
unsigned long flags;
struct sync_pt *pt;
if (size < sizeof(*pt))
@@ -177,13 +175,16 @@ static struct sync_pt *sync_pt_create(struct sync_timeline *obj, int size,
if (!pt)
return NULL;
spin_lock_irqsave(&obj->child_list_lock, flags);
spin_lock_irq(&obj->child_list_lock);
sync_timeline_get(obj);
dma_fence_init(&pt->base, &timeline_fence_ops, &obj->child_list_lock,
obj->context, value);
list_add_tail(&pt->child_list, &obj->child_list_head);
INIT_LIST_HEAD(&pt->active_list);
spin_unlock_irqrestore(&obj->child_list_lock, flags);
spin_unlock_irq(&obj->child_list_lock);
return pt;
}
@@ -206,9 +207,11 @@ static void timeline_fence_release(struct dma_fence *fence)
unsigned long flags;
spin_lock_irqsave(fence->lock, flags);
list_del(&pt->child_list);
if (!list_empty(&pt->active_list))
list_del(&pt->active_list);
spin_unlock_irqrestore(fence->lock, flags);
sync_timeline_put(parent);