Re: [PATCH 2/2] x86/mm: Fix sparse warnings in untagged_ptr()

[Andy Shevchenko]

On Wed, Nov 16, 2022 at 03:43:53AM +0300, Kirill A. Shutemov wrote:
> Linear Address Masking patchset triggered a lot of sparse warnings.
> 
> The root cause is that casting pointer to '__typeof__(*(ptr)) *' will
> strip all sparse tags. The type has to be defined based on the pointer
> type, not based on what the pointer points to.
> 
> Fix cast in untagged_ptr() and avoid __typeof__() usage in
> get/put_user().

Without this patch we have

drivers/auxdisplay/charlcd.c:482:21: warning: incorrect type in assignment (different address spaces)
drivers/auxdisplay/charlcd.c:482:21:    expected char const [noderef] __user *__ptr_clean
drivers/auxdisplay/charlcd.c:482:21:    got char const *

So,

Tested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

Can we have this series applied, please?

-- 
With Best Regards,
Andy Shevchenko