Re: [Xen-devel] [PATCH V3 10/41] xen/mm: Align virtual address on PAGE_SIZE in iounmap

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 05/10/2013 09:23 AM, Jan Beulich wrote:

>>>> On 10.05.13 at 04:17, Julien Grall <julien.grall@xxxxxxxxxx> wrote:
>> ioremap function can unlikely return an unaligned virtual address if
>> the physical address itself is unaligned on a page size.
>>
>> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> 
> If you used "unsigned long" instead of "vaddr_t" (I don't think this
> would build on x86 without doing so, as vaddr-t appear to be ARM
> specific):

Right. I will fix it.

> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
> 
>> --- a/xen/include/xen/vmap.h
>> +++ b/xen/include/xen/vmap.h
>> @@ -15,7 +15,9 @@ void __iomem *ioremap(paddr_t, size_t);
>>  
>>  static inline void iounmap(void __iomem *va)
>>  {
>> -    vunmap((void __force *)va);
>> +    vaddr_t addr = (vaddr_t)(void __force *)va;
>> +
>> +    vunmap((void *)(addr & PAGE_MASK));
>>  }
>>  
>>  void vm_init(void);
> 
> 


-- 
Julien

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