[PATCH 2/33] i386: define __pa_symbol

Eric W. Biederman
2006-08-01T11:06:28Z

On x86_64 we have to be careful with calculating the physical
address of kernel symbols. Both because of compiler odditities
and because the symbols live in a different range of the virtual
address space.

Having a defintition of __pa_symbol that works on both x86_64 and
i386 simplifies writing code that works for both x86_64 and
i386 that has these kinds of dependencies.

So this patch adds the trivial i386 __pa_symbol definition.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
include/asm-i386/page.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h
index f5bf544..eceb7f5 100644
--- a/include/asm-i386/page.h
+++ b/include/asm-i386/page.h
@@ -124,6 +124,7 @@ #define PAGE_OFFSET ((unsigned long)__P
#define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
#define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE)
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
+#define __pa_symbol(x) __pa(x)
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#ifdef CONFIG_FLATMEM
--
1.4.2.rc2.g5209e