[PATCH] don't create regular files in devfs

[Christoph Hellwig <hch@lst.de>]

Even more devfs creptomancy :)

When devfs is enabled the i386 microcode and mtrr drivers try to create
regular files in devfs in addition to their regular interfaces
(miscdevice and procfs).  The tools work with the normal interfaces
anyway in non-devfs systems and regular files in _dev_fs are a rather
strange concept..

Get rid of it.


--- 1.15/arch/i386/kernel/microcode.c	Thu Dec  5 21:56:34 2002
+++ edited/arch/i386/kernel/microcode.c	Sat Jan 11 16:50:00 2003
@@ -65,7 +65,6 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/miscdevice.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/spinlock.h>
 #include <linux/mm.h>
 
@@ -122,39 +121,14 @@
 	.fops	= &microcode_fops,
 };
 
-static devfs_handle_t devfs_handle;
-
 static int __init microcode_init(void)
 {
-	int error;
-
-	error = misc_register(&microcode_dev);
-	if (error)
-		printk(KERN_WARNING 
-			"microcode: can't misc_register on minor=%d\n",
-			MICROCODE_MINOR);
-
-	devfs_handle = devfs_register(NULL, "cpu/microcode",
-			DEVFS_FL_DEFAULT, 0, 0, S_IFREG | S_IRUSR | S_IWUSR, 
-			&microcode_fops, NULL);
-	if (devfs_handle == NULL && error) {
-		printk(KERN_ERR "microcode: failed to devfs_register()\n");
-		misc_deregister(&microcode_dev);
-		goto out;
-	}
-	error = 0;
-	printk(KERN_INFO 
-		"IA-32 Microcode Update Driver: v%s <tigran@veritas.com>\n", 
-		MICROCODE_VERSION);
-
-out:
-	return error;
+	return misc_register(&microcode_dev);
 }
 
 static void __exit microcode_exit(void)
 {
 	misc_deregister(&microcode_dev);
-	devfs_unregister(devfs_handle);
 	if (mc_applied)
 		kfree(mc_applied);
 	printk(KERN_INFO "IA-32 Microcode Update Driver v%s unregistered\n", 
@@ -373,7 +347,6 @@
 		ret = (ssize_t)len;
 	}
 out_fsize:
-	devfs_set_file_size(devfs_handle, mc_fsize);
 	vfree(microcode);
 out_unlock:
 	up_write(&microcode_rwsem);
@@ -389,7 +362,6 @@
 			if (mc_applied) {
 				int bytes = NR_CPUS * sizeof(struct microcode);
 
-				devfs_set_file_size(devfs_handle, 0);
 				kfree(mc_applied);
 				mc_applied = NULL;
 				printk(KERN_INFO "microcode: freed %d bytes\n", bytes);
--- 1.4/arch/i386/kernel/cpu/mtrr/if.c	Sat Dec 21 22:17:44 2002
+++ edited/arch/i386/kernel/cpu/mtrr/if.c	Sat Jan 11 16:50:35 2003
@@ -1,6 +1,5 @@
 #include <linux/init.h>
 #include <linux/proc_fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/ctype.h>
 #include <linux/module.h>
 #include <linux/seq_file.h>
@@ -300,8 +299,6 @@
 
 #  endif			/*  CONFIG_PROC_FS  */
 
-static devfs_handle_t devfs_handle;
-
 char * attrib_to_str(int x)
 {
 	return (x <= 6) ? mtrr_strings[x] : "?";
@@ -337,7 +334,6 @@
 			     attrib_to_str(type), usage_table[i]);
 		}
 	}
-	devfs_set_file_size(devfs_handle, len);	
 	return 0;
 }
 
@@ -350,11 +346,6 @@
 		proc_root_mtrr->owner = THIS_MODULE;
 		proc_root_mtrr->proc_fops = &mtrr_fops;
 	}
-#endif
-#ifdef USERSPACE_INTERFACE
-	devfs_handle = devfs_register(NULL, "cpu/mtrr", DEVFS_FL_DEFAULT, 0, 0,
-				      S_IFREG | S_IRUGO | S_IWUSR,
-				      &mtrr_fops, NULL);
 #endif
 	return 0;
 }