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[PATCH] uml: make the emulated iomem driver work on 2.6

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This makes the minimal fixes needed to make the UML iomem driver work in 2.6.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2005-06-08 15:47:50 -07:00 committed by Linus Torvalds
parent a38133298f
commit 3df59529ad
2 changed files with 26 additions and 4 deletions
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6
arch/um/Kconfig_char
View File

@ -204,5 +204,11 @@ config UML_RANDOM
http://sourceforge.net/projects/gkernel/). rngd periodically reads
/dev/hwrng and injects the entropy into /dev/random.
config MMAPPER
tristate "iomem emulation driver"
help
This driver allows a host file to be used as emulated IO memory inside
UML.
endmenu

24
arch/um/drivers/mmapper_kern.c
View File

@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/miscdevice.h>
#include <asm/uaccess.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
@ -117,24 +118,39 @@ static struct file_operations mmapper_fops = {
.release = mmapper_release,
};
static struct miscdevice mmapper_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "mmapper",
.fops = &mmapper_fops
};
static int __init mmapper_init(void)
{
int err;
printk(KERN_INFO "Mapper v0.1\n");
v_buf = (char *) find_iomem("mmapper", &mmapper_size);
if(mmapper_size == 0){
printk(KERN_ERR "mmapper_init - find_iomem failed\n");
return(0);
goto out;
}
err = misc_register(&mmapper_dev);
if(err){
printk(KERN_ERR "mmapper - misc_register failed, err = %d\n",
err);
goto out;
}
p_buf = __pa(v_buf);
devfs_mk_cdev(MKDEV(30, 0), S_IFCHR|S_IRUGO|S_IWUGO, "mmapper");
return(0);
out:
return 0;
}
static void mmapper_exit(void)
{
misc_deregister(&mmapper_dev);
}
module_init(mmapper_init);