Commit-ID: b0a5b83ee0fce9dbf8ff5fe1f8c9ae7dfafe458c Gitweb: http://git.kernel.org/tip/b0a5b83ee0fce9dbf8ff5fe1f8c9ae7dfafe458c Author: Ingo Molnar <mingo@xxxxxxx> AuthorDate: Tue, 16 Jun 2009 16:11:14 +0200 Committer: Joerg Roedel <joerg.roedel@xxxxxxx> CommitDate: Wed, 17 Jun 2009 16:26:04 +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@xxxxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx> --- lib/dma-debug.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/lib/dma-debug.c b/lib/dma-debug.c index a9b6b5c..c9187fe 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) { INIT_LIST_HEAD(&dma_entry_hash[i].list); - dma_entry_hash[i].lock = SPIN_LOCK_UNLOCKED; + spin_lock_init(&dma_entry_hash[i].lock); } if (dma_debug_fs_init() != 0) { -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html