Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

fs/devfs/util.c

@@ -0,0 +1,97 @@
+/*  devfs (Device FileSystem) utilities.
+
+    Copyright (C) 1999-2002  Richard Gooch
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
+    The postal address is:
+      Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
+
+    ChangeLog
+
+    19991031   Richard Gooch <rgooch@atnf.csiro.au>
+               Created.
+    19991103   Richard Gooch <rgooch@atnf.csiro.au>
+               Created <_devfs_convert_name> and supported SCSI and IDE CD-ROMs
+    20000203   Richard Gooch <rgooch@atnf.csiro.au>
+               Changed operations pointer type to void *.
+    20000621   Richard Gooch <rgooch@atnf.csiro.au>
+               Changed interface to <devfs_register_series>.
+    20000622   Richard Gooch <rgooch@atnf.csiro.au>
+               Took account of interface change to <devfs_mk_symlink>.
+               Took account of interface change to <devfs_mk_dir>.
+    20010519   Richard Gooch <rgooch@atnf.csiro.au>
+               Documentation cleanup.
+    20010709   Richard Gooch <rgooch@atnf.csiro.au>
+               Created <devfs_*alloc_major> and <devfs_*alloc_devnum>.
+    20010710   Richard Gooch <rgooch@atnf.csiro.au>
+               Created <devfs_*alloc_unique_number>.
+    20010730   Richard Gooch <rgooch@atnf.csiro.au>
+               Documentation typo fix.
+    20010806   Richard Gooch <rgooch@atnf.csiro.au>
+               Made <block_semaphore> and <char_semaphore> private.
+    20010813   Richard Gooch <rgooch@atnf.csiro.au>
+               Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers
+    20010818   Richard Gooch <rgooch@atnf.csiro.au>
+               Updated major masks up to Linus' "no new majors" proclamation.
+	       Block: were 126 now 122 free, char: were 26 now 19 free.
+    20020324   Richard Gooch <rgooch@atnf.csiro.au>
+               Fixed bug in <devfs_alloc_unique_number>: was clearing beyond
+	       bitfield.
+    20020326   Richard Gooch <rgooch@atnf.csiro.au>
+               Fixed bitfield data type for <devfs_*alloc_devnum>.
+               Made major bitfield type and initialiser 64 bit safe.
+    20020413   Richard Gooch <rgooch@atnf.csiro.au>
+               Fixed shift warning on 64 bit machines.
+    20020428   Richard Gooch <rgooch@atnf.csiro.au>
+               Copied and used macro for error messages from fs/devfs/base.c 
+    20021013   Richard Gooch <rgooch@atnf.csiro.au>
+               Documentation fix.
+    20030101   Adam J. Richter <adam@yggdrasil.com>
+               Eliminate DEVFS_SPECIAL_{CHR,BLK}.  Use mode_t instead.
+    20030106   Christoph Hellwig <hch@infradead.org>
+               Rewrite devfs_{,de}alloc_devnum to look like C code.
+*/
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/genhd.h>
+#include <linux/bitops.h>
+
+int devfs_register_tape(const char *name)
+{
+	char tname[32], dest[64];
+	static unsigned int tape_counter;
+	unsigned int n = tape_counter++;
+
+	sprintf(dest, "../%s", name);
+	sprintf(tname, "tapes/tape%u", n);
+	devfs_mk_symlink(tname, dest);
+
+	return n;
+}
+
+EXPORT_SYMBOL(devfs_register_tape);
+
+void devfs_unregister_tape(int num)
+{
+	if (num >= 0)
+		devfs_remove("tapes/tape%u", num);
+}
+
+EXPORT_SYMBOL(devfs_unregister_tape);