tree f36980eeb5eb2205478a523769b6730a19d9a3cf
parent c79ee4e466dd12347f112e2af306dca35198458f
author Ingo Molnar <mingo@elte.hu> 1245161474 +0200
committer Joerg Roedel <joerg.roedel@amd.com> 1245248764 +0200

dma-debug: Put all hash-chain locks into the same lock class

Alan Cox reported that lockdep runs out of its stack-trace entries
with certain configs:

 BUG: MAX_STACK_TRACE_ENTRIES too low

This happens because there are 1024 hash buckets, each with a
separate lock. Lockdep puts each lock into a separate lock class and
tracks them independently.

But in reality we never take more than one of the buckets, so they
really belong into a single lock-class. Annotate the has bucket lock
init accordingly.

[ Impact: reduce the lockdep footprint of dma-debug ]

Reported-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>