Re: [PATCH v9 3/5] qrwlock, x86 - Treat all data type not bigger thanlong as atomic in x86

[Linus Torvalds]

On Tue, Jan 21, 2014 at 8:09 AM, Waiman Long <waiman.long@xxxxxx> wrote:
>
> include/linux/compiler.h:
>
> #ifndef __native_word
> # ifdef __arch_native_word(t)
> #  define __native_word(t)      __arch_native_word(t)
> # else
> #  define __native_word(t) (sizeof(t) == sizeof(int) || sizeof(t) == siizeof(long))
> # endif
> #endif

Do we even really need this?

I'd suggest removing it entirely. You might want to retain the whole

  compiletime_assert_atomic_type()

thing on purely the alpha side, but then it's all inside just the
alpha code, without any need for this "native_word" thing.

And if somebody tries to do a "smp_store_release()" on a random
structure or union, do we care? We're not some nanny state that wants
to give nice warnings for insane code.

              Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/