linux-kernel - Re: [PATCH 1/1] PM: fix oops in suspend/hibernate code

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Message-ID: <4D25EE4A.9010602@gmail.com>
Date:	Thu, 06 Jan 2011 17:31:06 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Jiri Slaby <jslaby@...e.cz>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Len Brown <lenb@...nel.org>
Subject: Re: [PATCH 1/1] PM: fix oops in suspend/hibernate code

On 01/06/2011 05:09 PM, Jiri Slaby wrote:
>>> --- a/kernel/power/nvs.c
>>> +++ b/kernel/power/nvs.c
>>> @@ -105,7 +105,7 @@ int suspend_nvs_alloc(void)
>>>  /**
>>>   *	suspend_nvs_save - save NVS memory regions
>>>   */
>>> -void suspend_nvs_save(void)
>>> +int suspend_nvs_save(void)
>>>  {
>>>  	struct nvs_page *entry;
>>>  
>>> @@ -114,8 +114,14 @@ void suspend_nvs_save(void)
>>>  	list_for_each_entry(entry, &nvs_list, node)
>>>  		if (entry->data) {
>>>  			entry->kaddr = ioremap(entry->phys_start, entry->size);
>>
>> I wonder what happens if you simply change the ioremap() here to
>> ioremap_nocache() without any other modifications?
> 
> ioremap *is* ioremap_nocache on x86. And that's the conflict it
> complains about I guess? Don't you mean ioremap_cache?

Using ioremap_cache indeed fixes the problem...

thanks,
-- 
js
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