[PATCH v6 2/3] uacce: add uacce driver
jean-philippe at linaro.org
Fri Oct 25 18:35:38 AEDT 2019
On Fri, Oct 25, 2019 at 10:28:30AM +0800, zhangfei.gao at foxmail.com wrote:
> > Something else I noticed is uacce_idr isn't currently protected. The IDR
> > API expected the caller to use its own locking scheme. You could replace
> > it with an xarray, which I think is preferred to IDR now and provides a
> > xa_lock.
> Currently idr_alloc and idr_remove are simply protected by uacce_mutex,
Ah right, but idr_find() also needs to be protected?
> Will check xarray, looks it is more complicated then idr.
Having tried both, it can easily replace idr. For uacce I think it could
be something like (locking included):
uacce = xa_load(&uacce_xa, iminor(inode));
ret = xa_alloc(&uacce_xa, &uacce->dev_id, uacce, xa_limit_32b,
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