Merge tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

* tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming: (29 commits)
  C6X: replace tick_nohz_stop/restart_sched_tick calls
  C6X: add register_cpu call
  C6X: deal with memblock API changes
  C6X: fix timer64 initialization
  C6X: fix layout of EMIFA registers
  C6X: MAINTAINERS
  C6X: DSCR - Device State Configuration Registers
  C6X: EMIF - External Memory Interface
  C6X: general SoC support
  C6X: library code
  C6X: headers
  C6X: ptrace support
  C6X: loadable module support
  C6X: cache control
  C6X: clocks
  C6X: build infrastructure
  C6X: syscalls
  C6X: interrupt handling
  C6X: time management
  C6X: signal management
  ...

include/asm-generic/page.h

@@ -71,10 +71,14 @@ extern unsigned long memory_end;
 #define PAGE_OFFSET		(0)
 #endif
 
+#ifndef ARCH_PFN_OFFSET
+#define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
+#endif
+
 #ifndef __ASSEMBLY__
 
-#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
-#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
+#define __va(x) ((void *)((unsigned long) (x)))
+#define __pa(x) ((unsigned long) (x))
 
 #define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
 #define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
@@ -86,7 +90,7 @@ extern unsigned long memory_end;
 #define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
 #endif
 
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
+#define pfn_valid(pfn)		((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
 
 #define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
 				((void *)(kaddr) < (void *)memory_end))