nubus: Remove redundant code

Eliminate unused values from struct nubus_dev to save wasted memory
(a Radius PrecisionColor 24X card has about 95 functional resources
and up to six such cards may be fitted). Also remove redundant static
variable initialization, an unreachable !MACH_IS_MAC conditional,
the unused nubus_find_device() function, the bogus get_nubus_list()
prototype and the pointless card_present temporary variable.

Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 22 insertions, 35 deletions

diff --git a/drivers/nubus/nubus.c b/drivers/nubus/nubus.c
index e7c7e49a074a..4ae5c420f13f 100644
--- a/drivers/nubus/nubus.c
+++ b/drivers/nubus/nubus.c
@@ -282,23 +282,6 @@ EXPORT_SYMBOL(nubus_rewinddir);
 /* Driver interface functions, more or less like in pci.c */
 
 struct nubus_dev*
-nubus_find_device(unsigned short category, unsigned short type,
-		  unsigned short dr_hw, unsigned short dr_sw,
-		  const struct nubus_dev *from)
-{
-	struct nubus_dev *itor = from ? from->next : nubus_devices;
-
-	while (itor) {
-		if (itor->category == category && itor->type == type &&
-		    itor->dr_hw == dr_hw && itor->dr_sw == dr_sw)
-			return itor;
-		itor = itor->next;
-	}
-	return NULL;
-}
-EXPORT_SYMBOL(nubus_find_device);
-
-struct nubus_dev*
 nubus_find_type(unsigned short category, unsigned short type,
 		const struct nubus_dev *from)
 {
@@ -469,8 +452,10 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,
 		}
 		case NUBUS_RESID_NAME:
 		{
-			nubus_get_rsrc_str(dev->name, &ent, sizeof(dev->name));
-			pr_debug("    name: %s\n", dev->name);
+			char name[64];
+
+			nubus_get_rsrc_str(name, &ent, sizeof(name));
+			pr_debug("    name: %s\n", name);
 			break;
 		}
 		case NUBUS_RESID_DRVRDIR:
@@ -479,32 +464,39 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,
 			   use this :-) */
 			struct nubus_dir drvr_dir;
 			struct nubus_dirent drvr_ent;
+			unsigned char *driver;
 
 			nubus_get_subdir(&ent, &drvr_dir);
 			nubus_readdir(&drvr_dir, &drvr_ent);
-			dev->driver = nubus_dirptr(&drvr_ent);
-			pr_debug("    driver at: 0x%p\n", dev->driver);
+			driver = nubus_dirptr(&drvr_ent);
+			pr_debug("    driver at: 0x%p\n", driver);
 			break;
 		}
 		case NUBUS_RESID_MINOR_BASEOS:
+		{
 			/* We will need this in order to support
 			   multiple framebuffers.  It might be handy
 			   for Ethernet as well */
-			nubus_get_rsrc_mem(&dev->iobase, &ent, 4);
-			pr_debug("    memory offset: 0x%08lx\n", dev->iobase);
+			u32 base_offset;
+
+			nubus_get_rsrc_mem(&base_offset, &ent, 4);
+			pr_debug("    memory offset: 0x%08x\n", base_offset);
 			break;
+		}
 		case NUBUS_RESID_MINOR_LENGTH:
+		{
 			/* Ditto */
-			nubus_get_rsrc_mem(&dev->iosize, &ent, 4);
-			pr_debug("    memory length: 0x%08lx\n", dev->iosize);
+			u32 length;
+
+			nubus_get_rsrc_mem(&length, &ent, 4);
+			pr_debug("    memory length: 0x%08x\n", length);
 			break;
+		}
 		case NUBUS_RESID_FLAGS:
-			dev->flags = ent.data;
-			pr_debug("    flags: 0x%06x\n", dev->flags);
+			pr_debug("    flags: 0x%06x\n", ent.data);
 			break;
 		case NUBUS_RESID_HWDEVID:
-			dev->hwdevid = ent.data;
-			pr_debug("    hwdevid: 0x%06x\n", dev->hwdevid);
+			pr_debug("    hwdevid: 0x%06x\n", ent.data);
 			break;
 		default:
 			/* Local/Private resources have their own
@@ -798,11 +790,8 @@ static void __init nubus_probe_slot(int slot)
 
 	rp = nubus_rom_addr(slot);
 	for (i = 4; i; i--) {
-		int card_present;
-
 		rp--;
-		card_present = hwreg_present(rp);
-		if (!card_present)
+		if (!hwreg_present(rp))
 			continue;
 
 		dp = *rp;
@@ -839,8 +828,6 @@ static int __init nubus_init(void)
 	if (!MACH_IS_MAC)
 		return 0;
 
-	nubus_devices = NULL;
-	nubus_boards = NULL;
 	nubus_scan_bus();
 	nubus_proc_init();
 	return 0;