[RFC PATCH 2/9] ntsync: Reserve a minor device number and ioctl range.
From: Elizabeth Figura <zfigura@codeweavers.com>
Date: 2024-01-24 00:58:44
Also in:
lkml
Subsystem:
char and misc drivers, documentation, ntsync synchronization primitive driver, the rest · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Jonathan Corbet, Elizabeth Figura, Linus Torvalds
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com> --- Documentation/admin-guide/devices.txt | 3 ++- Documentation/userspace-api/ioctl/ioctl-number.rst | 2 ++ drivers/misc/ntsync.c | 3 ++- include/linux/miscdevice.h | 1 + 4 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index 94c98be1329a..041404397ee5 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt@@ -376,8 +376,9 @@ 240 = /dev/userio Serio driver testing device 241 = /dev/vhost-vsock Host kernel driver for virtio vsock 242 = /dev/rfkill Turning off radio transmissions (rfkill) + 243 = /dev/ntsync NT synchronization primitive device - 243-254 Reserved for local use + 244-254 Reserved for local use 255 Reserved for MISC_DYNAMIC_MINOR 11 char Raw keyboard device (Linux/SPARC only)
diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst
index 457e16f06e04..a1326a5bc2e0 100644
--- a/Documentation/userspace-api/ioctl/ioctl-number.rst
+++ b/Documentation/userspace-api/ioctl/ioctl-number.rst@@ -378,6 +378,8 @@ Code Seq# Include File Comments <mailto:thomas@winischhofer.net> 0xF6 all LTTng Linux Trace Toolkit Next Generation <mailto:mathieu.desnoyers@efficios.com> +0xF7 00-1F uapi/linux/ntsync.h NT synchronization primitives + <mailto:wine-devel@winehq.org> 0xF8 all arch/x86/include/uapi/asm/amd_hsmp.h AMD HSMP EPYC system management interface driver <mailto:nchatrad@amd.com> 0xFD all linux/dm-ioctl.h
diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c
index 9424c6210e51..84b498e2b2d5 100644
--- a/drivers/misc/ntsync.c
+++ b/drivers/misc/ntsync.c@@ -40,7 +40,7 @@ static const struct file_operations ntsync_fops = { }; static struct miscdevice ntsync_misc = { - .minor = MISC_DYNAMIC_MINOR, + .minor = NTSYNC_MINOR, .name = NTSYNC_NAME, .fops = &ntsync_fops, };
@@ -51,3 +51,4 @@ MODULE_AUTHOR("Elizabeth Figura"); MODULE_DESCRIPTION("Kernel driver for NT synchronization primitives"); MODULE_LICENSE("GPL"); MODULE_ALIAS("devname:" NTSYNC_NAME); +MODULE_ALIAS_MISCDEV(NTSYNC_MINOR);
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index c0fea6ca5076..fe5d9366fdf7 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h@@ -71,6 +71,7 @@ #define USERIO_MINOR 240 #define VHOST_VSOCK_MINOR 241 #define RFKILL_MINOR 242 +#define NTSYNC_MINOR 243 #define MISC_DYNAMIC_MINOR 255 struct device;
--
2.43.0