generic: add phys_addr_t for holding physical addresses

Add a kernel-wide "phys_addr_t" which is guaranteed to be able to hold
any physical address.  By default it equals the word size of the
architecture, but a 32-bit architecture can set ARCH_PHYS_ADDR_T_64BIT
if it needs a 64-bit phys_addr_t.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 6 insertions, 3 deletions

diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index ab8528793f08..d0e58605a520 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -33,7 +33,6 @@ typedef u64	pmdval_t;
 typedef u64     pudval_t;
 typedef u64     pgdval_t;
 typedef u64     pgprotval_t;
-typedef u64     phys_addr_t;
 
 typedef union {
         struct {
@@ -54,7 +53,6 @@ typedef unsigned long	pmdval_t;
 typedef unsigned long   pudval_t;
 typedef unsigned long   pgdval_t;
 typedef unsigned long   pgprotval_t;
-typedef unsigned long   phys_addr_t;
 
 typedef union {
         pteval_t pte;
diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
index c6916c83e6b1..2456fbf2d7dc 100644
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -79,7 +79,6 @@ typedef unsigned long	pmdval_t;
 typedef unsigned long   pudval_t;
 typedef unsigned long   pgdval_t;
 typedef unsigned long   pgprotval_t;
-typedef unsigned long   phys_addr_t;
 
 typedef struct page *pgtable_t;
 
diff --git a/include/linux/types.h b/include/linux/types.h
index d4a9ce6e2760..022c668496da 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -197,6 +197,12 @@ typedef u64 resource_size_t;
 typedef u32 resource_size_t;
 #endif
 
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+typedef u64 phys_addr_t;
+#else
+typedef u32 phys_addr_t;
+#endif
+
 struct ustat {
         __kernel_daddr_t        f_tfree;
         __kernel_ino_t          f_tinode;