Fix AGP compile on non-x86 architectures

AGP shouldn't use "global_flush_tlb()" to flush the AGP mappings, that i
spurely an x86'ism.  The proper AGP mapping flusher that should be used
is "flush_agp_mappings()", which on x86 obviously happens to do a global
TLB flush.

This makes AGP (or at least the config _I_ happen to use) compile again
on ppc64.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Author: Linus Torvalds

drivers/char/agp/backend.c

@@ -147,7 +147,7 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
 			printk(KERN_ERR PFX "unable to get memory for scratch page.\n");
 			return -ENOMEM;
 		}
-		global_flush_tlb();
+		flush_agp_mappings();
 
 		bridge->scratch_page_real = virt_to_gart(addr);
 		bridge->scratch_page =
@@ -191,7 +191,7 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
 	if (bridge->driver->needs_scratch_page) {
 		bridge->driver->agp_destroy_page(
 				gart_to_virt(bridge->scratch_page_real));
-		global_flush_tlb();
+		flush_agp_mappings();
 	}
 	if (got_gatt)
 		bridge->driver->free_gatt_table(bridge);
@@ -217,7 +217,7 @@ static void agp_backend_cleanup(struct agp_bridge_data *bridge)
 	    bridge->driver->needs_scratch_page) {
 		bridge->driver->agp_destroy_page(
 				gart_to_virt(bridge->scratch_page_real));
-		global_flush_tlb();
+		flush_agp_mappings();
 	}
 }
 

drivers/char/agp/generic.c

@@ -155,7 +155,7 @@ void agp_free_memory(struct agp_memory *curr)
 		for (i = 0; i < curr->page_count; i++) {
 			curr->bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[i]));
 		}
-		global_flush_tlb();
+		flush_agp_mappings();
 	}
 	agp_free_key(curr->key);
 	vfree(curr->memory);
@@ -213,8 +213,6 @@ struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge,
 		new->memory[i] = virt_to_gart(addr);
 		new->page_count++;
 	}
-	global_flush_tlb();
-
 	new->bridge = bridge;
 
 	flush_agp_mappings();