linux-kernel - [PATCH 05/50] x86/boot/e820: Clean up the E820_X

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Date:   Sat, 28 Jan 2017 23:11:26 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 05/50] x86/boot/e820: Clean up the E820_X_MAX definition

E820_X_MAX is defined in a somewhat messy fashion:

 - there's a pretty pointless looking #ifndef __KERNEL__ define that
   makes no sense in the non-UAPI header anymore,

 - part of it is defined in api.h, which is not for type definitions,

 - plus it's defined in two headers and the main explanation is in the
   header where we don't have the real definition.

So move it into a single place in e820/types.h and get rid of the
!__KERNEL__ case altogether. Drop the smaller comment - the larger
one explains it just fine.

Note that the zeropage does not use E820_X_MAX, it uses the legacy
128 entries definition.

No change in functionality.

Cc: Alex Thorlton <athorlton@....com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Huang, Ying <ying.huang@...el.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Juergen Gross <jgross@...e.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Paul Jackson <pj@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rafael J. Wysocki <rjw@...k.pl>
Cc: Tejun Heo <tj@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Wei Yang <richard.weiyang@...il.com>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/asm/e820/api.h   |  9 ---------
 arch/x86/include/asm/e820/types.h | 13 +++++++------
 2 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/arch/x86/include/asm/e820/api.h b/arch/x86/include/asm/e820/api.h
index 010efbceb40c..e161deb5736c 100644
--- a/arch/x86/include/asm/e820/api.h
+++ b/arch/x86/include/asm/e820/api.h
@@ -1,15 +1,6 @@
 #ifndef _ASM_E820_API_H
 #define _ASM_E820_API_H
 
-/*
- * E820_X_MAX is the maximum size of the extended E820 table.  The extended
- * table may contain up to 3 extra E820 entries per possible NUMA node, so we
- * make room for 3 * MAX_NUMNODES possible entries, beyond the standard 128.
- * Also note that E820_X_MAX *must* be defined before we include asm/e820/types.h.
- */
-#include <linux/numa.h>
-#define E820_X_MAX (E820MAX + 3 * MAX_NUMNODES)
-
 #include <asm/e820/types.h>
 
 #ifndef __ASSEMBLY__
diff --git a/arch/x86/include/asm/e820/types.h b/arch/x86/include/asm/e820/types.h
index cf73c104c041..b05e812ff4f2 100644
--- a/arch/x86/include/asm/e820/types.h
+++ b/arch/x86/include/asm/e820/types.h
@@ -3,9 +3,6 @@
 
 #include <uapi/asm/e820/types.h>
 
-/* Our map: */
-#define E820MAP			0x2d0
-
 /*
  * The legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
  * constrained space in the zeropage.
@@ -31,9 +28,13 @@
  * to allow more than three entries per node or otherwise refine
  * this size.
  */
-#ifndef __KERNEL__
-# define E820_X_MAX		E820MAX
-#endif
+
+#include <linux/numa.h>
+
+#define E820_X_MAX		(E820MAX + 3*MAX_NUMNODES)
+
+/* Our map: */
+#define E820MAP			0x2d0
 
 /* Number of entries in E820MAP: */
 #define E820NR			0x1e8
-- 
2.7.4