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 5174cf0..aa6a317 100644 (file)
--- 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 */