Re: PA8800 with 3.9.0-rc1-JeR-10942-g6dbe51c : WARNING: at lib/timerqueue.c:74

[John David Anglin <dave.anglin@bell.net>]

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On 20-Mar-13, at 4:12 PM, John David Anglin wrote:

> On 3/20/2013 1:27 PM, Jeroen Roovers wrote:
>> +CONFIG_PREEMPT_NONE=y
> Given that CONFIG_PREEMPT is broken, we must be missing at least one
> preempt_disable()/preempt_enable() pair.


You might try the attached change.  My rp3440 booted with  
CONFIG_PREEMPT=y
and CONFIG_PREEMPT_NONE=y with it.  The fix is just a guess.

Dave
--
John David Anglin	dave.anglin@bell.net



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diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 4b12890..1871724 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -372,10 +372,12 @@ void flush_kernel_dcache_page_addr(void *addr)
 {
 	unsigned long flags;
 
+	preempt_disable();
 	flush_kernel_dcache_page_asm(addr);
 	purge_tlb_start(flags);
 	pdtlb_kernel(addr);
 	purge_tlb_end(flags);
+	preempt_enable();
 }
 EXPORT_SYMBOL(flush_kernel_dcache_page_addr);