x86, MM: virtual address debug, v2

I've removed the test from phys_to_nid and made a function from __phys_addr
only when the debugging is enabled (on x86_32).
Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Cc: tglx@linutronix.de
Cc: hpa@zytor.com
Cc: Mike Travis <travis@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: <x86@kernel.org>
Cc: linux-mm@kvack.org
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/mm/ioremap.c

@@ -51,6 +51,7 @@ static inline int phys_addr_valid(unsigned long addr)
 	return 1;
 }
 
+#ifdef CONFIG_DEBUG_VIRTUAL
 unsigned long __phys_addr(unsigned long x)
 {
 	/* VMALLOC_* aren't constants; not available at the boot time */
@@ -59,6 +60,7 @@ unsigned long __phys_addr(unsigned long x)
 	return x - PAGE_OFFSET;
 }
 EXPORT_SYMBOL(__phys_addr);
+#endif
 
 #endif
 

include/asm-x86/mmzone_64.h

@@ -29,7 +29,6 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
 {
 	unsigned nid;
 	VIRTUAL_BUG_ON(!memnodemap);
-	VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize);
 	nid = memnodemap[addr >> memnode_shift];
 	VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
 	return nid;

include/asm-x86/page_32.h

@@ -65,7 +65,11 @@ typedef struct page *pgtable_t;
 
 #ifndef __ASSEMBLY__
 #define __phys_addr_const(x)	((x) - PAGE_OFFSET)
+#ifdef CONFIG_DEBUG_VIRTUAL
 extern unsigned long __phys_addr(unsigned long);
+#else
+#define __phys_addr(x)		((x) - PAGE_OFFSET)
+#endif
 #define __phys_reloc_hide(x)	RELOC_HIDE((x), 0)
 
 #ifdef CONFIG_FLATMEM