Re: [PATCH v11 3/8] powerpc/perf: consolidate read_user_stack_32

[Nicholas Piggin]

Michal SuchÃnek's on April 3, 2020 8:52 pm:
> Hello,
> 
> there are 3 variants of the function
> 
> read_user_stack_64
> 
> 32bit read_user_stack_32
> 64bit read_user_Stack_32

Right.

> On Fri, Apr 03, 2020 at 05:13:25PM +1000, Nicholas Piggin wrote:
[...]
>>  #endif /* CONFIG_PPC64 */
>>  
>> +static int read_user_stack_32(unsigned int __user *ptr, unsigned int *ret)
>> +{
>> +	return __read_user_stack(ptr, ret, sizeof(*ret));
> Does not work for 64bit read_user_stack_32 ^ this should be 4.
> 
> Other than that it should preserve the existing logic just fine.

sizeof(int) == 4 on 64bit so it should work.

Thanks,
Nick