From f01f0f052d1255dcdcf11d4872c4bca95e46b36c Mon Sep 17 00:00:00 2001
From: David Woodhouse <dwmw2@infradead.org>
Date: Tue, 12 Sep 2006 20:36:05 -0700
Subject: [PATCH] [PATCH] headers_check: don't expose PFN stuff to userspace in
 <asm-i386/setup.h>

The header file <linux/pfn.h> doesn't exist in userspace and probably
shouldn't -- but it's used unconditionally in <asm-i386/setup.h>.  Protect it
with #ifdef __KERNEL__ and move setup.h from $(header-y) to $(unifdef-y) in
Kbuild accordingly.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 include/asm-i386/Kbuild  | 4 ++--
 include/asm-i386/setup.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-i386/Kbuild b/include/asm-i386/Kbuild
index 335b2fa4e06..2308190321d 100644
--- a/include/asm-i386/Kbuild
+++ b/include/asm-i386/Kbuild
@@ -1,5 +1,5 @@
 include include/asm-generic/Kbuild.asm
 
-header-y += boot.h debugreg.h ldt.h setup.h ucontext.h
+header-y += boot.h debugreg.h ldt.h ucontext.h
 
-unifdef-y += mtrr.h vm86.h
+unifdef-y += mtrr.h setup.h vm86.h
diff --git a/include/asm-i386/setup.h b/include/asm-i386/setup.h
index f737e423029..2734909eff8 100644
--- a/include/asm-i386/setup.h
+++ b/include/asm-i386/setup.h
@@ -6,6 +6,7 @@
 #ifndef _i386_SETUP_H
 #define _i386_SETUP_H
 
+#ifdef __KERNEL__
 #include <linux/pfn.h>
 
 /*
@@ -13,6 +14,7 @@
  */
 #define MAXMEM_PFN	PFN_DOWN(MAXMEM)
 #define MAX_NONPAE_PFN	(1 << 20)
+#endif
 
 #define PARAM_SIZE 4096
 #define COMMAND_LINE_SIZE 256
-- 
2.41.0