[PATCH] add some missing gloabl_flush_tlb() calls

Patch from Thomas Schlichter <schlicht@uni-mannheim.de>

Adds some missing global_flush_tlb() calls, which are requried after a call
to change_page_attr().

arch/i386/mm/ioremap.c

@@ -205,6 +205,7 @@ void *ioremap_nocache (unsigned long phys_addr, unsigned long size)
 			iounmap(p); 
 			p = NULL;
 		}
+		global_flush_tlb();
 	} 
 
 	return p;					
@@ -226,6 +227,7 @@ void iounmap(void *addr)
 		change_page_attr(virt_to_page(__va(p->phys_addr)),
 				 p->size >> PAGE_SHIFT,
 				 PAGE_KERNEL); 				 
+		global_flush_tlb();
 	} 
 	kfree(p); 
 }

arch/x86_64/kernel/pci-gart.c

@@ -437,6 +437,7 @@ static __init int init_k8_gatt(agp_kern_info *info)
 	}
 	flush_gart(); 
 	
+	global_flush_tlb();
 		
 	printk("PCI-DMA: aperture base @ %x size %u KB\n", aper_base, aper_size>>10); 
 	return 0;

arch/x86_64/mm/ioremap.c

@@ -205,6 +205,7 @@ void *ioremap_nocache (unsigned long phys_addr, unsigned long size)
 			iounmap(p); 
 			p = NULL;
 		}
+		global_flush_tlb();
 	} 
 
 	return p;					
@@ -226,6 +227,7 @@ void iounmap(void *addr)
 		change_page_attr(virt_to_page(__va(p->phys_addr)),
 				 p->size >> PAGE_SHIFT,
 				 PAGE_KERNEL); 				 
+		global_flush_tlb();
 	} 
 	kfree(p); 
 }