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!
diff --git a/drivers/char/ftape/zftape/zftape-buffers.c b/drivers/char/ftape/zftape/zftape-buffers.c
new file mode 100644
index 0000000..da06f13
--- /dev/null
+++ b/drivers/char/ftape/zftape/zftape-buffers.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 1995-1997 Claus-Justus Heine.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING. If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ *
+ * $Source: /homes/cvs/ftape-stacked/ftape/zftape/zftape-buffers.c,v $
+ * $Revision: 1.2 $
+ * $Date: 1997/10/05 19:18:59 $
+ *
+ * This file contains the dynamic buffer allocation routines
+ * of zftape
+ */
+
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+
+#include <linux/zftape.h>
+
+#include <linux/vmalloc.h>
+
+#include "../zftape/zftape-init.h"
+#include "../zftape/zftape-eof.h"
+#include "../zftape/zftape-ctl.h"
+#include "../zftape/zftape-write.h"
+#include "../zftape/zftape-read.h"
+#include "../zftape/zftape-rw.h"
+#include "../zftape/zftape-vtbl.h"
+
+/* global variables
+ */
+
+/* local varibales
+ */
+static unsigned int used_memory;
+static unsigned int peak_memory;
+
+void zft_memory_stats(void)
+{
+ TRACE_FUN(ft_t_flow);
+
+ TRACE(ft_t_noise, "Memory usage (vmalloc allocations):\n"
+ KERN_INFO "total allocated: %d\n"
+ KERN_INFO "peak allocation: %d",
+ used_memory, peak_memory);
+ peak_memory = used_memory;
+ TRACE_EXIT;
+}
+
+int zft_vcalloc_once(void *new, size_t size)
+{
+ TRACE_FUN(ft_t_flow);
+ if (zft_vmalloc_once(new, size) < 0) {
+ TRACE_EXIT -ENOMEM;
+ }
+ memset(*(void **)new, '\0', size);
+ TRACE_EXIT 0;
+}
+int zft_vmalloc_once(void *new, size_t size)
+{
+ TRACE_FUN(ft_t_flow);
+
+ if (*(void **)new != NULL || size == 0) {
+ TRACE_EXIT 0;
+ }
+ if ((*(void **)new = vmalloc(size)) == NULL) {
+ TRACE_EXIT -ENOMEM;
+ }
+ used_memory += size;
+ if (peak_memory < used_memory) {
+ peak_memory = used_memory;
+ }
+ TRACE_ABORT(0, ft_t_noise,
+ "allocated buffer @ %p, %d bytes", *(void **)new, size);
+}
+int zft_vmalloc_always(void *new, size_t size)
+{
+ TRACE_FUN(ft_t_flow);
+
+ zft_vfree(new, size);
+ TRACE_EXIT zft_vmalloc_once(new, size);
+}
+void zft_vfree(void *old, size_t size)
+{
+ TRACE_FUN(ft_t_flow);
+
+ if (*(void **)old) {
+ vfree(*(void **)old);
+ used_memory -= size;
+ TRACE(ft_t_noise, "released buffer @ %p, %d bytes",
+ *(void **)old, size);
+ *(void **)old = NULL;
+ }
+ TRACE_EXIT;
+}
+
+void *zft_kmalloc(size_t size)
+{
+ void *new;
+
+ while ((new = kmalloc(size, GFP_KERNEL)) == NULL) {
+ msleep_interruptible(100);
+ }
+ memset(new, 0, size);
+ used_memory += size;
+ if (peak_memory < used_memory) {
+ peak_memory = used_memory;
+ }
+ return new;
+}
+
+void zft_kfree(void *old, size_t size)
+{
+ kfree(old);
+ used_memory -= size;
+}
+
+/* there are some more buffers that are allocated on demand.
+ * cleanup_module() calles this function to be sure to have released
+ * them
+ */
+void zft_uninit_mem(void)
+{
+ TRACE_FUN(ft_t_flow);
+
+ zft_vfree(&zft_hseg_buf, FT_SEGMENT_SIZE);
+ zft_vfree(&zft_deblock_buf, FT_SEGMENT_SIZE); zft_deblock_segment = -1;
+ zft_free_vtbl();
+ if (zft_cmpr_lock(0 /* don't load */) == 0) {
+ (*zft_cmpr_ops->cleanup)();
+ (*zft_cmpr_ops->reset)(); /* unlock it again */
+ }
+ zft_memory_stats();
+ TRACE_EXIT;
+}