Blackfin: convert kgdbtest to proc_fops

The read_proc and write_proc interfaces are going to be removed in the
common kernel code.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/kernel/kgdb_test.c

@@ -18,7 +18,7 @@
 #include <asm/blackfin.h>
 
 static char cmdline[256];
-static unsigned long len;
+static size_t len;
 
 #ifndef CONFIG_SMP
 static int num1 __attribute__((l1_data));
@@ -59,7 +59,8 @@ int kgdb_test(char *name, int len, int count, int z)
 	return count;
 }
 
-static int test_proc_output(char *buf)
+static ssize_t kgdb_test_proc_read(struct file *file, char __user *buf,
+				   size_t count, loff_t *ppos)
 {
 	kgdb_test("hello world!", 12, 0x55, 0x10);
 #ifndef CONFIG_SMP
@@ -72,25 +73,8 @@ static int test_proc_output(char *buf)
 	return 0;
 }
 
-static int test_read_proc(char *page, char **start, off_t off,
-				 int count, int *eof, void *data)
-{
-	int len;
-
-	len = test_proc_output(page);
-	if (len <= off+count)
-		*eof = 1;
-	*start = page + off;
-	len -= off;
-	if (len > count)
-		len = count;
-	if (len < 0)
-		len = 0;
-	return len;
-}
-
-static int test_write_proc(struct file *file, const char *buffer,
-				 unsigned long count, void *data)
+static ssize_t kgdb_test_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *pos)
 {
 	if (count >= 256)
 		len = 255;
@@ -103,18 +87,19 @@ static int test_write_proc(struct file *file, const char *buffer,
 	return len;
 }
 
+static const struct file_operations kgdb_test_proc_fops = {
+	.owner		= THIS_MODULE,
+	.read		= kgdb_test_proc_read,
+	.write		= kgdb_test_proc_write,
+};
+
 static int __init kgdbtest_init(void)
 {
 	struct proc_dir_entry *entry;
 
-	entry = create_proc_entry("kgdbtest", 0, NULL);
+	entry = proc_create("kgdbtest", 0, NULL, &kgdb_test_proc_fops);
 	if (entry == NULL)
 		return -ENOMEM;
-
-	entry->read_proc = test_read_proc;
-	entry->write_proc = test_write_proc;
-	entry->data = NULL;
-
 	return 0;
 }