linux-kernel - Re: [PATCH v4 4/9] staging:lustre: merge socklnd

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Date:	Wed, 24 Jun 2015 18:33:46 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	James Simmons <jsimmons@...radead.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	driverdevel <devel@...verdev.osuosl.org>,
	Oleg Drokin <oleg.drokin@...el.com>,
	Andreas Dilger <andreas.dilger@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	lustre-devel@...ts.lustre
Subject: Re: [PATCH v4 4/9] staging:lustre: merge socklnd_lib-linux.h into
 socklnd.h

On Wed, Jun 24, 2015 at 02:37:51PM +0200, Geert Uytterhoeven wrote:
> Hi James,
> 
> On Thu, Jun 11, 2015 at 9:18 PM, James Simmons <jsimmons@...radead.org> wrote:
> > From: John L. Hammond <john.hammond@...el.com>
> >
> > Originally socklnd_lib-linux.h contained linux specific
> > wrappers and defines but since the linux kernel is the
> > only supported platform now we can merge what little
> > remains in the header into socklnd.h. This is broken
> > out of the original patch 12932 that was merged to the
> > Intel/OpenSFS branch.
> >
> > Signed-off-by: John L. Hammond <john.hammond@...el.com>
> > Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2675
> > Reviewed-on: http://review.whamcloud.com/12932
> > Reviewed-by: Isaac Huang <he.huang@...el.com>
> > Reviewed-by: James Simmons <uja.ornl@...il.com>
> > Reviewed-by: Oleg Drokin <oleg.drokin@...el.com>
> > Signed-off-by: James Simmons <jsimmons@...radead.org>
> > ---
> >  .../staging/lustre/lnet/klnds/socklnd/socklnd.h    |   39 +++++++++-
> >  .../lustre/lnet/klnds/socklnd/socklnd_lib-linux.h  |   86 --------------------
> >  .../lustre/lnet/klnds/socklnd/socklnd_lib.c        |    4 +-
> >  3 files changed, 40 insertions(+), 89 deletions(-)
> >  delete mode 100644 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib-linux.h
> >
> > diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> > index 53275f9..7125eb9 100644
> > --- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> > +++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> > @@ -25,16 +25,40 @@
> >   *
> >   */
> >
> > +#ifndef _SOCKLND_SOCKLND_H_
> > +#define _SOCKLND_SOCKLND_H_
> > +
> >  #define DEBUG_PORTAL_ALLOC
> >  #define DEBUG_SUBSYSTEM S_LND
> >
> > -#include "socklnd_lib-linux.h"
> > +#include <asm/irq.h>
> > +#include <linux/crc32.h>
> > +#include <linux/errno.h>
> 
> Including <asm/irq.h> first causes a build failure for m68k/allmodconfig:
> 
> arch/m68k/include/asm/irq.h:77:12: error: expected '=', ',', ';',
> 'asm' or '__attribute__' before 'void'
> arch/m68k/include/asm/irq.h:78:1: error: unknown type name 'atomic_t'
> arch/m68k/include/asm/irq.h:77:12: error: expected '=', ',', ';',
> 'asm' or '__attribute__' before 'void'
> arch/m68k/include/asm/irq.h:78:1: error: unknown type name 'atomic_t'
> 
> http://kisskb.ellerman.id.au/kisskb/buildresult/12448922/
> 
> Fixing it inside arch/m68k/include/asm/irq.h might cause Include Hell,
> so perhaps you can just move the <asm/*> include below all <linux/*>
> includes?
> 
Hi Geert,

I have not tested it, but I think the following may fix the problem
while avoiding any include problems. Since pt_regs is used in the file,
one could argue that it should be declared. 

Thanks,
Guenter

--
diff --git a/arch/m68k/include/asm/irq.h b/arch/m68k/include/asm/irq.h
index 81ca118d58af..28ffa8d59cf0 100644
--- a/arch/m68k/include/asm/irq.h
+++ b/arch/m68k/include/asm/irq.h
@@ -74,6 +74,8 @@ extern unsigned int irq_canonicalize(unsigned int irq);
 #define irq_canonicalize(irq)  (irq)
 #endif /* !(CONFIG_M68020 || CONFIG_M68030 || CONFIG_M68040 || CONFIG_M68060) */
 
+struct pt_regs;
+
 asmlinkage void do_IRQ(int irq, struct pt_regs *regs);
 extern atomic_t irq_err_count;
 
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