linux-kernel - [RFC 6/7] Use an external declaration in exit.c for fs

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Message-Id: <20061118054413.8884.99940.sendpatchset@schroedinger.engr.sgi.com>
Date:	Fri, 17 Nov 2006 21:44:13 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-mm@...ck.org, Manfred Spraul <manfred@...orfullife.com>,
	Christoph Lameter <clameter@....com>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: [RFC 6/7] Use an external declaration in exit.c for fs_cachep

Use an external declaration in exit.c for fs_cachep.

fs_cachep is only used in kernel/exit.c and in kernel/fork.c.
It is defined in kernel/fork.c so we need to add an external
declaration to kernel/exit.c to be able to avoid the
declaration.

Signed-off-by: Christoph Lameter <clameter@....com>

Index: linux-2.6.19-rc5-mm2/include/linux/slab.h
===================================================================
--- linux-2.6.19-rc5-mm2.orig/include/linux/slab.h	2006-11-17 23:04:05.859898302 -0600
+++ linux-2.6.19-rc5-mm2/include/linux/slab.h	2006-11-17 23:04:09.679562142 -0600
@@ -298,7 +298,6 @@ static inline void kmem_set_shrinker(kme
 
 /* System wide caches */
 extern kmem_cache_t	*names_cachep;
-extern kmem_cache_t	*fs_cachep;
 
 #endif	/* __KERNEL__ */
 
Index: linux-2.6.19-rc5-mm2/kernel/exit.c
===================================================================
--- linux-2.6.19-rc5-mm2.orig/kernel/exit.c	2006-11-15 16:48:11.485511089 -0600
+++ linux-2.6.19-rc5-mm2/kernel/exit.c	2006-11-17 23:04:09.764530373 -0600
@@ -48,6 +48,8 @@
 #include <asm/pgtable.h>
 #include <asm/mmu_context.h>
 
+extern kmem_cache_t *fs_cachep;
+
 extern void sem_exit (void);
 
 static void exit_mm(struct task_struct * tsk);
-
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