From: Mike Waychison <mikew@google.com>
Date: Tue, 15 Mar 2011 06:58:50 +0000 (-0700)
Subject: x86: Better comments for get_bios_ebda()
X-Git-Tag: v3.0-rc1~390^2~15
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f548ccd47d608e88d432745091e13f927ced83f7;p=karo-tx-linux.git

x86: Better comments for get_bios_ebda()

Make the comments a bit clearer for get_bios_ebda so that it actually
tells us what it is returning.

Signed-off-by: Mike Waychison <mikew@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/arch/x86/include/asm/bios_ebda.h b/arch/x86/include/asm/bios_ebda.h
index 5174cf0bf590..aa6a3170ab5a 100644
--- a/arch/x86/include/asm/bios_ebda.h
+++ b/arch/x86/include/asm/bios_ebda.h
@@ -4,11 +4,14 @@
 #include <asm/io.h>
 
 /*
- * there is a real-mode segmented pointer pointing to the
- * 4K EBDA area at 0x40E.
+ * Returns physical address of EBDA.  Returns 0 if there is no EBDA.
  */
 static inline unsigned int get_bios_ebda(void)
 {
+	/*
+	 * There is a real-mode segmented pointer pointing to the
+	 * 4K EBDA area at 0x40E.
+	 */
 	unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
 	address <<= 4;
 	return address;	/* 0 means none */