[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] sysfs patch for kqemu
From: |
Matthew Mastracci |
Subject: |
[Qemu-devel] sysfs patch for kqemu |
Date: |
Sun, 13 Feb 2005 18:24:09 -0700 |
User-agent: |
Mozilla Thunderbird 0.9 (X11/20041103) |
Here's a patch for supporting sysfs and udev. There's no conditional
logic - it needs the sysfs stuff to be present in the kernel headers.
It dynamically allocates a major number and stuffs it into a global
variable and uses that to register a device with sysfs. udev will then
pick up the new device and automatically create a new "kqemu" device node.
Matt.
--- kqemu/kmod.c 2005-02-10 15:09:09.000000000 -0700
+++ qemu/kqemu/kmod.c 2005-02-13 18:19:14.833684304 -0700
@@ -11,6 +11,7 @@
#include <linux/version.h>
#include <linux/ioctl.h>
#include <linux/smp_lock.h>
+#include <linux/device.h>
#include <asm/atomic.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
@@ -34,6 +35,9 @@
int page_alloc_count;
#endif
+struct class_simple *kqemu_class;
+int kqemu_major;
+
/* lock the page at virtual address 'user_addr' and return its
page index. Return -1 if error */
unsigned long CDECL kqemu_lock_user_page(unsigned long user_addr)
@@ -297,9 +301,12 @@
ret = register_chrdev(KQEMU_MAJOR, "kqemu", &kqemu_fops);
if (ret < 0) {
- printk("kqemu: could not get major %d\n", KQEMU_MAJOR);
+ printk("kqemu: could not get major\n");
return ret;
}
+ kqemu_major = ret;
+ kqemu_class = class_simple_create(THIS_MODULE, "kqemu");
+ class_simple_device_add(kqemu_class, MKDEV(kqemu_major,0), NULL, "kqemu");
printk("KQEMU installed, max_instances=%d max_locked_mem=%dkB.\n",
KQEMU_MAX_INSTANCES,
max_locked_pages * 4);
@@ -308,5 +315,7 @@
void cleanup_module(void)
{
- unregister_chrdev(KQEMU_MAJOR, "kqemu");
+ class_simple_device_remove(MKDEV(kqemu_major,0));
+ class_simple_destroy(kqemu_class);
+ unregister_chrdev(kqemu_major, "kqemu");
}
- [Qemu-devel] sysfs patch for kqemu,
Matthew Mastracci <=