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floppy: Run floppy initialization asynchronous

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floppy_init is quite slow, 3s on my test system to determine
that there is no floppy. Run it asynchronous to the other
init calls to improve boot time.

[jkosina@suse.cz: fix modular build]

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Andi Kleen 2012-07-02 17:27:04 -07:00 committed by Jiri Kosina
parent a70f35af4e
commit 0cc15d03bc
1 changed files with 20 additions and 1 deletions
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21
drivers/block/floppy.c
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@ -191,6 +191,7 @@ static int print_unex = 1;
#include <linux/mutex.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/async.h>
/*
* PS/2 floppies have much slower step rates than regular floppies.
@ -4122,7 +4123,7 @@ static struct kobject *floppy_find(dev_t dev, int *part, void *data)
return get_disk(disks[drive]);
}
static int __init floppy_init(void)
static int __init do_floppy_init(void)
{
int i, unit, drive;
int err, dr;
@ -4337,6 +4338,24 @@ out_put_disk:
return err;
}
#ifndef MODULE
static __init void floppy_async_init(void *data, async_cookie_t cookie)
{
do_floppy_init();
}
#endif
static int __init floppy_init(void)
{
#ifdef MODULE
return do_floppy_init();
#else
/* Don't hold up the bootup by the floppy initialization */
async_schedule(floppy_async_init, NULL);
return 0;
#endif
}
static const struct io_region {
int offset;
int size;