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Date: Mon, 7 Apr 2014 10:13:36 +0200 From: Peter Zijlstra <peterz@...radead.org> To: Vladimir Davydov <vdavydov@...allels.com> Cc: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, devel@...nvz.org, Ingo Molnar <mingo@...hat.com> Subject: Re: [PATCH -mm 2/3] lockdep: mark rwsem_acquire_read as recursive On Sun, Apr 06, 2014 at 07:33:51PM +0400, Vladimir Davydov wrote: > rw_semaphore implementation allows recursing calls to down_read, but > lockdep thinks that it doesn't. As a result, it will complain > false-positively, e.g. if we do not observe some predefined locking > order when taking an rw semaphore for reading and a mutex. > > This patch makes lockdep think rw semaphore is read-recursive, just like > rw spin lock. Uhm no rwsem isn't read recursive. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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