linux-kernel - [PATCH] Linux 2.6.17.11 - fix compilation error on IA64 (try #3)

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Message-Id: <1156493587.2977.20.camel@localhost.localdomain>
Date:	Fri, 25 Aug 2006 17:13:07 +0900
From:	Fernando Vazquez <fernando@....ntt.co.jp>
To:	gregkh@...e.de
Cc:	dev@...nvz.org, xemul@...nvz.org, davem@...emloft.net,
	linux-kernel@...r.kernel.org, stable@...nel.org, akpm@...l.org,
	linux-ia64@...r.kernel.org, kamezawa.hiroyu@...fujitsu.com
Subject: [PATCH] Linux 2.6.17.11 - fix compilation error on IA64 (try #3)

Resending without Japanese characters in the mail header to avoid spam filters.
Sorry for the noise.

---

The commit 8833ebaa3f4325820fe3338ccf6fae04f6669254 introduced a change that broke 
IA64 compilation as shown below:

  gcc -Wp,-MD,arch/ia64/kernel/.entry.o.d  -nostdinc -isystem /usr/lib/gcc/ia64-linux-gnu/4.1.2/include -D__KERNEL__ -Iinclude  -include include/linux/autoconf.h -DHAVE_WORKING_TEXT_ALIGN -DHAVE_MODEL_SMALL_ATTRIBUTE -DHAVE_SERIALIZE_DIRECTIVE -D__ASSEMBLY__   -mconstant-gp -c -o arch/ia64/kernel/entry.o arch/ia64/kernel/entry.S
include/asm/mman.h: Assembler messages:
include/asm/mman.h:13: Error: Unknown opcode `int ia64_map_check_rgn(unsigned long addr,unsigned long len,'
include/asm/mman.h:14: Error: Unknown opcode `unsigned long flags)'
make[1]: *** [arch/ia64/kernel/entry.o] Error 1
make: *** [arch/ia64/kernel] Error 2

The reason is that "asm/mman.h" is being included from entry.S indirectly through
"asm/pgtable.h" (see code snips below).

* arch/ia64/kernel/entry.S:
...
#include <asm/pgtable.h>
...

* include/asm-ia64/pgtable.h:
...
#include <asm/mman.h>
...

* include/asm-ia64/mman.h
...
#ifdef __KERNEL__
#define arch_mmap_check ia64_map_check_rgn
int ia64_map_check_rgn(unsigned long addr, unsigned long len,
                unsigned long flags);
#endif
...

Signed-off-by: Fernando Vazquez <fernando@...ellilink.co.jp>
---

diff -urNp linux-2.6.17.11/include/asm-ia64/mman.h linux-2.6.17.11-fix/include/asm-ia64/mman.h
--- linux-2.6.17.11/include/asm-ia64/mman.h	2006-08-25 11:36:09.000000000 +0900
+++ linux-2.6.17.11-fix/include/asm-ia64/mman.h	2006-08-25 11:39:16.000000000 +0900
@@ -9,10 +9,12 @@
  */
 
 #ifdef __KERNEL__
+#ifndef __ASSEMBLY__
 #define arch_mmap_check	ia64_map_check_rgn
 int ia64_map_check_rgn(unsigned long addr, unsigned long len,
 		unsigned long flags);
 #endif
+#endif
 
 #include <asm-generic/mman.h>
 


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