sparc32: drop sparc_unmapped_base

The base is always the same so no need to use a variable for this.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/page_32.h

@@ -107,8 +107,7 @@ typedef unsigned long iopgprot_t;
 
 typedef struct page *pgtable_t;
 
-extern unsigned long sparc_unmapped_base;
-#define TASK_UNMAPPED_BASE	sparc_unmapped_base
+#define TASK_UNMAPPED_BASE	0x50000000
 
 #else /* !(__ASSEMBLY__) */
 

arch/sparc/mm/init_32.c

@@ -45,7 +45,6 @@ unsigned long pfn_base;
 EXPORT_SYMBOL(pfn_base);
 
 struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
-unsigned long sparc_unmapped_base;
 
 struct pgtable_cache_struct pgt_quicklists;
 
@@ -297,7 +296,6 @@ void __init paging_init(void)
 	case sun4m:
 	case sun4d:
 		srmmu_paging_init();
-		sparc_unmapped_base = 0x50000000;
 		break;
 	default:
 		prom_printf("paging_init: Cannot init paging on this Sparc\n");