Re: [PATCH 10/13] OMAP3: PM: export the v7_flush_dcache_all API to modules

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Hi Santosh,

On Thu, May 19, 2011 at 10:04 AM, Santosh Shilimkar
<santosh.shilimkar@xxxxxx> wrote:
> On 5/18/2011 11:02 PM, jean.pihet@xxxxxxxxxxxxxx wrote:
>>
>> From: Jean Pihet<j-pihet@xxxxxx>
>>
>> Provide the the assembly function v7_flush_dcache_all to the
>> OMAP3 PM module, under CONFIG_CPU_V7.
>> v7_flush_dcache_all is used by the low level sleep code.
>>
>> Signed-off-by: Jean Pihet<j-pihet@xxxxxx>
>> ---
>>  arch/arm/mach-omap2/pm.c |    4 ++++
>>  arch/arm/mach-omap2/pm.h |    4 ++++
>>  2 files changed, 8 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
>> index 2e43fd6..ab69c5a 100644
>> --- a/arch/arm/mach-omap2/pm.c
>> +++ b/arch/arm/mach-omap2/pm.c
>> @@ -325,6 +325,10 @@ unsigned long
>> omap_pm_tick_nohz_get_sleep_length_us(void)
>>  EXPORT_SYMBOL(omap_pm_tick_nohz_get_sleep_length_us);
>>  #endif
>>
>> +#ifdef CONFIG_CPU_V7
>> +EXPORT_SYMBOL(v7_flush_dcache_all);
>> +#endif
>> +
>
> You have already mentioned, this export is wrong and indeed it
> is wrong. You can use "flush_cache_all()" instead here which will
> pick the right asm function.
I could not find a usable flush cache function that is exported for
use by the modules. I will re-submit the next version of the patches
and specifically ask about it on l-a-k ML as well.

>The downside is it will invalidate
> I cache as well but that's ok because it's get invalidated anyways
> in wakeup path.
That should be ok.

>
> Regards
> Santosh
>

Thanks,
Jean
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