Re: v3.13-rc6+ regression (ARM board)

From: Linus Torvalds
Date: Thu Jan 02 2014 - 14:39:09 EST

On Thu, Jan 2, 2014 at 4:07 AM, Krzysztof HaÅasa <khalasa@xxxxxxx> wrote:
> This means these two commits don't like each other:
> seqcount: Add lockdep functionality to seqcount/seqlock structures
> sched_clock: Use seqcount instead of rolling our own

Does something like this fix it for you?

--- a/kernel/time/sched_clock.c
+++ b/kernel/time/sched_clock.c
@@ -36,6 +36,7 @@ core_param(irqtime, irqtime, int, 0400);

static struct clock_data cd = {
.mult = NSEC_PER_SEC / HZ,
+ .seq = SEQCNT_ZERO(cd.seq),

static u64 __read_mostly sched_clock_mask;

(The above is not even compile-tested, because x86 doesn't use
GENERIC_SCHED_CLOCK. So I did the patch blindly, but I think you get
the idea..)

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