Thread (12 messages) 12 messages, 4 authors, 2009-09-01

Re: [PATCH] IB/ehca: Fix lockdep failures for shca_list_lock

From: Michael Ellerman <hidden>
Date: 2008-11-22 03:41:47
Also in: lkml

On Fri, 2008-11-21 at 17:02 +0100, Johannes Berg wrote:
On Fri, 2008-11-21 at 16:37 +0100, Joachim Fenkes wrote:
quoted
+	u64 flags;
quoted
-	spin_lock(&shca_list_lock);
+	spin_lock_irqsave(&shca_list_lock, flags);
That's wrong and I think will give a warning on all machines where
u64 != unsigned long. Might not particularly matter in this case.
Crud, sorry.
Also, generally it seems wrong to say "fix lockdep failure" when the
patch really fixes a bug that lockdep happened to find.
True. I guess it should be "fix locking error found with lockdep", to
make it clear no one has actually hit the bug.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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