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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>
This commit is contained in:
Mike Waychison 2011-03-14 23:58:50 -07:00 committed by Greg Kroah-Hartman
parent 57d5f9f808
commit f548ccd47d
1 changed files with 5 additions and 2 deletions
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7
arch/x86/include/asm/bios_ebda.h
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@ -4,11 +4,14 @@
#include <asm/io.h> #include <asm/io.h>
/* /*
* there is a real-mode segmented pointer pointing to the * Returns physical address of EBDA. Returns 0 if there is no EBDA.
* 4K EBDA area at 0x40E.
*/ */
static inline unsigned int get_bios_ebda(void) 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); unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
address <<= 4; address <<= 4;
return address; /* 0 means none */ return address; /* 0 means none */