From: Linus Torvalds <torvalds@linux-foundation.org>
To: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Jakub Jelinek <jakub@redhat.com>, Dave Jones <davej@redhat.com>,
drepper@redhat.com, mingo@redhat.com, tglx@redhat.com,
linux-kernel@vger.kernel.org, Roland McGrath <roland@redhat.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: Re: [PATCH] Fix compile breakage caused by asmlinkage_protect
Date: Fri, 11 Apr 2008 07:46:48 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.1.00.0804110744100.3143@woody.linux-foundation.org> (raw)
In-Reply-To: <20080411114654.GA12270@osiris.boeblingen.de.ibm.com>
On Fri, 11 Apr 2008, Heiko Carstens wrote:
>
> git commit 54a015104136974262afa4b8ddd943ea70dec8a2
> "asmlinkage_protect replaces prevent_tail_call" causes this build failure
> on s390:
>
> AS arch/s390/kernel/entry64.o
> In file included from arch/s390/kernel/entry64.S:14:
> include/linux/linkage.h:34: error: syntax error in macro parameter list
> make[1]: *** [arch/s390/kernel/entry64.o] Error 1
> make: *** [arch/s390/kernel] Error 2
Ok, that's just _odd_.
> So just surround the new define with an #ifndef __ASSEMBLY__ to prevent
> any side effects on asm code.
There are no side effects on asm code. It just adds a #define that
obviously won't be used.
Is the s390 assembler using some strange C pre-processor that is different
from the main C preprocessor and doesn't understand this pattern?
I really think you should fix *that*, because otherwise you'll hit these
kinds of bugs occasionally. There aren't that many asm files, it's not
worth it optimizing them to use some faster-but-stupider preprocessor.
Linus
next prev parent reply other threads:[~2008-04-11 14:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080410155940.GA11721@redhat.com>
[not found] ` <alpine.LFD.1.00.0804100906470.3143@woody.linux-foundation.org>
[not found] ` <20080410165244.GV20478@devserv.devel.redhat.com>
[not found] ` <alpine.LFD.1.00.0804101009420.3143@woody.linux-foundation.org>
[not found] ` <alpine.LFD.1.00.0804101415450.3143@woody.linux-foundation.org>
[not found] ` <20080410214114.GY20478@devserv.devel.redhat.com>
[not found] ` <alpine.LFD.1.00.0804101447240.3143@woody.linux-foundation.org>
2008-04-10 22:37 ` [PATCH 1/2] asmlinkage_protect replaces prevent_tail_call Roland McGrath
2008-04-11 11:46 ` [PATCH] Fix compile breakage caused by asmlinkage_protect Heiko Carstens
2008-04-11 14:46 ` Linus Torvalds [this message]
2008-04-11 15:06 ` Jakub Jelinek
2008-04-11 15:11 ` Al Viro
2008-04-11 15:25 ` Linus Torvalds
2008-04-11 15:37 ` Kyle McMartin
2008-04-11 16:03 ` Martin Schwidefsky
2008-04-11 17:09 ` Adrian Bunk
2008-04-10 22:38 ` [PATCH 2/2] asmlinkage_protect sys_io_getevents Roland McGrath
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