linux

iv/linux

History

Ahmed S. Darwish 318ce71f3e dma-buf: Remove custom seqcount lockdep class key

Commit 3c3b177a9369 ("reservation: add support for read-only access
using rcu") introduced a sequence counter to manage updates to
reservations. Back then, the reservation object initializer
reservation_object_init() was always inlined.

Having the sequence counter initialization inlined meant that each of
the call sites would have a different lockdep class key, which would've
broken lockdep's deadlock detection. The aforementioned commit thus
introduced, and exported, a custom seqcount lockdep class key and name.

The commit 8735f16803f00 ("dma-buf: cleanup reservation_object_init...")
transformed the reservation object initializer to a normal non-inlined C
function. seqcount_init(), which automatically defines the seqcount
lockdep class key and must be called non-inlined, can now be safely used.

Remove the seqcount custom lockdep class key, name, and export. Use
seqcount_init() inside the dma reservation object initializer.

Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://lkml.kernel.org/r/20200720155530.1173732-12-a.darwish@linutronix.de

2020-07-29 16:14:25 +02:00

heaps

dma-buf: heaps: Remove redundant heap identifier from system heap name

2019-12-17 21:37:40 +05:30

dma-buf.c

dmabuf: use spinlock to access dmabuf->name

2020-07-10 15:39:29 +05:30

dma-fence-array.c

dma-fence: Propagate errors to dma-fence-array container

2019-08-12 08:25:52 +01:00

dma-fence-chain.c

dma-buf: Report signaled links inside dma-fence-chain