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miscdevice: Add helper macro for misc device boilerplate

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Many modules call misc_register and misc_deregister in its module init
and exit methods without any additional code. This ends up being
boilerplate. This patch adds helper macro module_misc_device(), that
replaces module_init()/ module_exit() with template functions.

This patch also converts drivers to use new macro.

Change since v1:
Add device.h include in miscdevice.h as module_driver macro was not
available from other include files in some architectures.

Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
PrasannaKumar Muralidharan
2016-08-25 22:30:49 +05:30
committed by Greg Kroah-Hartman
parent 832c8232dd
commit ca75d601b5
7 changed files with 15 additions and 80 deletions
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19
drivers/s390/char/sclp_ctl.c
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@@ -126,21 +126,4 @@ static struct miscdevice sclp_ctl_device = {
.name = "sclp",
.fops = &sclp_ctl_fops,
};
/*
* Register sclp_ctl misc device
*/
static int __init sclp_ctl_init(void)
{
return misc_register(&sclp_ctl_device);
}
module_init(sclp_ctl_init);
/*
* Deregister sclp_ctl misc device
*/
static void __exit sclp_ctl_exit(void)
{
misc_deregister(&sclp_ctl_device);
}
module_exit(sclp_ctl_exit);
module_misc_device(sclp_ctl_device);