[MIPS] Introduce __pa_symbol()

This patch introduces __pa_symbol() macro which should be used to
calculate the physical address of kernel symbols. It also relies
on RELOC_HIDE() to avoid any compiler's oddities when doing
arithmetics on symbols.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index c3b13de..0dc1a45 100644 (file)
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -142,6 +142,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 #define __pa_page_offset(x)    PAGE_OFFSET
 #endif
 #define __pa(x)                        ((unsigned long)(x) - __pa_page_offset(x))
+#define __pa_symbol(x)         __pa(RELOC_HIDE((unsigned long)(x),0))
 #define __va(x)                        ((void *)((unsigned long)(x) + PAGE_OFFSET))
 
 #define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)