dmaengine: provide a common 'issue_pending_all' implementation

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async_tx and net_dma each have open-coded versions of issue_pending_all,
so provide a common routine in dmaengine.

The implementation needs to walk the global device list, so implement
rcu to allow dma_issue_pending_all to run lockless.  Clients protect
themselves from channel removal events by holding a dmaengine reference.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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This commit is contained in:

Dan Williams 2009-01-06 11:38:14 -07:00

parent bec085134e

commit 2ba05622b8

5 changed files with 27 additions and 24 deletions

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12

crypto/async_tx/async_tx.c

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27

drivers/dma/dmaengine.c

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2

include/linux/async_tx.h

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1

include/linux/dmaengine.h

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9

net/core/dev.c

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