linux-kernel - Re: [PATCH 1/6] kernel/locking: Fix compile error with qrwlock.c

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Date:   Thu, 18 May 2017 22:27:53 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     babu.moger@...cle.com
Cc:     peterz@...radead.org, mingo@...hat.com, arnd@...db.de,
        shannon.nelson@...cle.com, haakon.bugge@...cle.com,
        steven.sistare@...cle.com, vijay.ac.kumar@...cle.com,
        jane.chu@...cle.com, sparclinux@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 1/6] kernel/locking: Fix compile error with qrwlock.c

From: Babu Moger <babu.moger@...cle.com>
Date: Thu, 18 May 2017 18:36:05 -0600

> Seeing this error on SPARC while compiling qrwlock.c.
> 
>   CC      kernel/locking/qrwlock.o
> In file included from ./include/asm-generic/qrwlock_types.h:5,
>                  from ./arch/sparc/include/asm/qrwlock.h:4,
>                  from kernel/locking/qrwlock.c:24:
> ./arch/sparc/include/asm/spinlock_types.h:5:3: error:
>         #error "please don't include this file directly"
> 
> Re-arrange the includes in qrwlock_types.h and also include spinlock.h
> in qrwlock.c to fix it. This should also help other architectures when
> queued rwlock is enabled.
> 
> Signed-off-by: Babu Moger <babu.moger@...cle.com>
> Reviewed-by: Håkon Bugge <haakon.bugge@...cle.com>
> Reviewed-by: Jane Chu <jane.chu@...cle.com>
> Reviewed-by: Shannon Nelson <shannon.nelson@...cle.com>
> Reviewed-by: Vijay Kumar <vijay.ac.kumar@...cle.com>

I think you can simply remove the:

#ifndef __LINUX_SPINLOCK_TYPES_H
# error "please don't include this file directly"
#endif

stanza from the sparc header file instead.  Other architectures
don't use this guard.