Re: [PATCH 1/1] hung_task: fix warnings by enforcing alignment on lock structures

[Finn Thain]

On Sun, 24 Aug 2025, kernel test robot wrote:

> 
> All warnings (new ones prefixed by >>):
> 
>    In file included from sound/soc/codecs/mt6660.c:15:
> >> sound/soc/codecs/mt6660.h:28:1: warning: alignment 1 of 'struct mt6660_chip' is less than 8 [-Wpacked-not-aligned]
>       28 | };
>          | ^
> >> sound/soc/codecs/mt6660.h:25:22: warning: 'io_lock' offset 49 in 'struct mt6660_chip' isn't aligned to 8 [-Wpacked-not-aligned]
>       25 |         struct mutex io_lock;
>          |                      ^~~~~~~
> 

Misalignment warnings like this one won't work if you just pick an 
alignment arbitrarily i.e. to suit whatever bitfield you happen to need.

Instead, I think I would naturally align the actual locks, that is, 
arch_spinlock_t and arch_rwlock_t in include/linux/spinlock_types*.h.