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| author |   Mike Waychison <mikew@google.com> | 2011-03-14 23:58:50 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2011-04-29 14:13:15 -0700 |
| commit | f548ccd47d608e88d432745091e13f927ced83f7 (patch) | |
| tree | d5e93a47a4d7fddf6474b35b43c9ce275c97c0f5 /arch/x86/include/asm/bios_ebda.h | |
| parent | x86: get_bios_ebda_length() (diff) | |
| download | linux-dev-f548ccd47d608e88d432745091e13f927ced83f7.tar.xz linux-dev-f548ccd47d608e88d432745091e13f927ced83f7.zip | |
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>
Diffstat (limited to 'arch/x86/include/asm/bios_ebda.h')
| -rw-r--r-- | arch/x86/include/asm/bios_ebda.h | 7 |
1 files changed, 5 insertions, 2 deletions
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 */ |