On Sun, Dec 11, 2016 at 12:12 PM, Chris Wilson chris@chris-wilson.co.uk wrote:
On Tue, Nov 15, 2016 at 10:43:34PM +0100, Daniel Vetter wrote:
On Tue, Nov 15, 2016 at 03:46:42PM +0000, Chris Wilson wrote:
Joonas complained that writing ww_mutex_lock(&resv->lock, ctx) was too intrusive compared to reservation_object_lock(resv, ctx);
Signed-off-by: Chris Wilson chris@chris-wilson.co.uk Cc: Sumit Semwal sumit.semwal@linaro.org Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com
include/linux/reservation.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/include/linux/reservation.h b/include/linux/reservation.h index ed238961e1bf..9cfc0d857862 100644 --- a/include/linux/reservation.h +++ b/include/linux/reservation.h @@ -129,6 +129,40 @@ reservation_object_fini(struct reservation_object *obj) }
/**
- reservation_object_lock - lock the reservation object
- @obj: the reservation object
- @ctx: the locking context
- Locks the reservation object for exclusive access and modification. Note,
- that the lock is only against other writers, readers will run concurrently
- with a writer under RCU. The seqlock is used to notify readers if they
- overlap with a writer.
- As the reservation object may be locked by multiple parties in an
- undefined order, a #ww_acquire_ctx is passed to unwind if a cycle
s/#/&/ for struct references. Otherwise the magic hotlink won't appear (once we get around to pulling all the core docs into the overall sphinx build). I can fix this while applying if everyone else is ok with the patch - imo it makes sense.
Anyone want to second these ww_mutex wrappers for reservation objects?
Looks good to me.
Reviewed-by: Alex Deucher alexander.deucher@amd.com
- is detected. See ww_mutex_lock() and ww_acquire_init(). A reservation
- object may be locked by itself by passing NULL as @ctx.
- */
+static inline int +reservation_object_lock(struct reservation_object *obj,
struct ww_acquire_ctx *ctx)+{
- return ww_mutex_lock(&obj->lock, ctx);
+}
+/**
- reservation_object_unlock - unlock the reservation object
- @obj: the reservation object
- Unlocks the reservation object following exclusive access.
- */
+static inline void +reservation_object_unlock(struct reservation_object *obj) +{
- ww_mutex_unlock(&obj->lock);
+}
+/**
- reservation_object_get_excl - get the reservation object's
- exclusive fence, with update-side lock held
- @obj: the reservation object
-- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel