linux-kernel - [Patch] uml: fix the highmem build error

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Message-ID: <20081127181228.GA4417@hack.voiplan.pt>
Date:	Thu, 27 Nov 2008 18:12:28 +0000
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...l.org>, jdike@...toit.com,
	user-mode-linux-devel@...ts.sourceforge.net,
	Al Viro <viro@...iv.linux.org.uk>
Subject: [Patch] uml: fix the highmem build error


This patch fixes this error:

arch/um/kernel/mem.c: In function ‘init_highmem’:        
arch/um/kernel/mem.c:177: error: ‘pkmap_page_table’ undeclared (first
use in this function)                                 
arch/um/kernel/mem.c:177: error: (Each undeclared identifier is
reported only once      
arch/um/kernel/mem.c:177: error: for each function it appears in.)  

Compile and run tested.

Signed-off-by: WANG Cong <wangcong@...ux.org>
Cc: Jeff Dike <jdike@...toit.com>
Cc: Al Viro <viro@...iv.linux.org.uk>

---
diff --git a/arch/um/include/asm/fixmap.h b/arch/um/include/asm/fixmap.h
index 69c0252..4e656c9 100644
--- a/arch/um/include/asm/fixmap.h
+++ b/arch/um/include/asm/fixmap.h
@@ -40,6 +40,9 @@ enum fixed_addresses {
 #endif
 	__end_of_fixed_addresses
 };
+extern pte_t *pkmap_page_table;
+extern pte_t *kmap_pte;
+extern pgprot_t kmap_prot;
 
 extern void __set_fixmap (enum fixed_addresses idx,
 			  unsigned long phys, pgprot_t flags);
diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index bcc079c..884f9e2 100644
--- a/arch/x86/mm/highmem_32.c
+++ b/arch/x86/mm/highmem_32.c
@@ -1,3 +1,4 @@
+#include <asm/fixmap.h>
 #include <linux/highmem.h>
 #include <linux/module.h>
 
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