Am 30.05.22 um 17:45 schrieb Sergey Senozhatsky:
On (22/05/30 16:55), Christian König wrote:
If you just want to create a single dma_fence which is also only bound to a single context you can embed the lock into the fence without much problem.
See how the dma_fence_array does that for example: https://elixir.bootlin.com/linux/latest/source/include/linux/dma-fence-array...
Christian, I'm not sure I'm following you on the "embed the lock into the fence without much problem" part. If I understand it correctly this should be something like:
fences = kmalloc_array(1, sizeof(*fences), GFP_KERNEL); for_each_fence(...) {
// what spinlock should I use here? dma_fence_init(&fences[i], .. &lock ..); dma_fence_get(&fences[i]);} fence_array = dma_fence_array_create(1, fences, ....); sync_file_create(&fence_array->base);
Well no, that's the high level usage of the dma_fence_array.
What I meant was this here:
struct dma_fence_array { struct dma_fence base;
spinlock_t lock; ... };
Regards, Christian.
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