Re: [v3 PATCH 2/2] printk: Make linux/printk.h self-contained

[Heiko Carstens <heiko.carstens@de.ibm.com>]

On Wed, Jun 17, 2020 at 05:17:21PM +1000, Herbert Xu wrote:
> As it stands if you include printk.h by itself it will fail to
> compile because it requires definitions from ratelimit.h.  However,
> simply including ratelimit.h from printk.h does not work due to
> inclusion loops involving sched.h and kernel.h.
> 
> This patch solves this by moving bits from ratelimit.h into a new
> header file which can then be included by printk.h without any
> worries about header loops.
> 
> The build bot then revealed some intriguing failures arising out
> of this patch.  On s390 there is an inclusion loop with asm/bug.h
> and linux/kernel.h that triggers a compile failure, because kernel.h
> will cause asm-generic/bug.h to be included before s390's own
> asm/bug.h has finished processing.  This has been fixed by not
> including kernel.h in arch/s390/include/asm/bug.h.
> 
> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
> Acked-by: Petr Mladek <pmladek@suse.com>
> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> ---
> 
>  arch/s390/include/asm/bug.h     |    2 -

FWIW, feel free to add

Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>

for the s390 part.