Le 14/06/2022 à 08:34, Greg KH a écrit :

On Tue, Jun 14, 2022 at 06:09:35AM +0000, Wenhu Wang wrote:

quoted

quoted

Odd indentation, did you use checkpatch.pl on your patch?

Actually, I checked with the scripts, and there was no warning here.
I also checked in text editors and vim, if I translate tab with 4 spaces,
the "vma/mem" areas in the 5 lines were aligned.

Tabs in Linux are always 8 spaces wide.

See 
https://docs.kernel.org/process/coding-style.html?highlight=coding+style#indentation

Tabs are 8 characters, and thus indentations are also 8 characters. 
There are heretic movements that try to make indentations 4 (or even 2!) 
characters deep, and that is akin to trying to define the value of PI to 
be 3.

Christophe