path: root/lib
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authorIngo Molnar <mingo@elte.hu>2009-06-16 16:11:14 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2009-06-17 16:26:04 +0200
commitb0a5b83ee0fce9dbf8ff5fe1f8c9ae7dfafe458c (patch)
treef36980eeb5eb2205478a523769b6730a19d9a3cf /lib
parentc79ee4e466dd12347f112e2af306dca35198458f (diff)
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>
Diffstat (limited to 'lib')
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index a9b6b5c9e09..c9187fed0b9 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -716,7 +716,7 @@ void dma_debug_init(u32 num_entries)
for (i = 0; i < HASH_SIZE; ++i) {
- dma_entry_hash[i].lock = SPIN_LOCK_UNLOCKED;
+ spin_lock_init(&dma_entry_hash[i].lock);
if (dma_debug_fs_init() != 0) {