Re: [patch 2/6 -rt] powerpc 2.6.20-rt8: to convert spinlocks to rawones.

From: Sergei Shtylyov
Date: Wed Mar 07 2007 - 09:55:18 EST


Hello.

Benjamin Herrenschmidt wrote:

--- linux-rt8/arch/powerpc/kernel/irq.c 2007-02-20 14:30:38.000000000 +0900
+++ rt/arch/powerpc/kernel/irq.c 2007-03-05 18:54:34.000000000 +0900
@@ -392,7 +392,7 @@ EXPORT_SYMBOL(do_softirq);
#ifdef CONFIG_PPC_MERGE

static LIST_HEAD(irq_hosts);
-static spinlock_t irq_big_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_RAW_SPINLOCK(irq_big_lock);
static DEFINE_PER_CPU(unsigned int, irq_radix_reader);
static unsigned int irq_radix_writer;
struct irq_map_entry irq_map[NR_IRQS];

I've already sent a patch fixing this one (along with many others) a month ago:

http://ozlabs.org/pipermail/linuxppc-dev/2007-February/031164.html

I wonder iof it was ever considered... :-/

It was but not for 2.6.21 timeframe due to people lack of time/bandwidth
among others :-)

I was asking Ingo, basically. :-)

I intend to try to spend some time before the 2.6.22 merge window to
gather those -rt related patches that can be merged already and push
them to powerpc.git.

(Note to mingo: that means that we might end up with patches both in
your tree and being push via powerpc, I hope that's not too much of a
problem).

Well, this is happening every -rc1 now -- part of -rt getting merged to mainline.

I can't promise I'll have time to do much, but I'd like to do it, so
find me on irc every now and then to "poke" if you don't see anything
happening...

My purpose was only to get this into -rt patch for now.

Cheers,
Ben.

WBR, Sergei
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