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| author | Jeff Dike <jdike@addtoit.com> | 2005-06-08 15:47:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-08 16:21:11 -0700 |
| commit | 3df59529ad1045da61698bb5dd8ebaa547aeb46f (patch) | |
| tree | f7370854b4c8aa3a6c72990b00094dc454b3e039 /arch | |
| parent | a38133298fc678335a0229e97b6161a7ac6fec84 (diff) | |
| download | lwn-3df59529ad1045da61698bb5dd8ebaa547aeb46f.tar.gz lwn-3df59529ad1045da61698bb5dd8ebaa547aeb46f.zip | |
[PATCH] uml: make the emulated iomem driver work on 2.6
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/um/Kconfig_char | 6 | ||||
| -rw-r--r-- | arch/um/drivers/mmapper_kern.c | 24 |
2 files changed, 26 insertions, 4 deletions
diff --git a/arch/um/Kconfig_char b/arch/um/Kconfig_char index 3e50fdb67626..62d87b71179b 100644 --- a/arch/um/Kconfig_char +++ b/arch/um/Kconfig_char @@ -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 diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c index a63231dffe05..a37a5ac13c22 100644 --- a/arch/um/drivers/mmapper_kern.c +++ b/arch/um/drivers/mmapper_kern.c @@ -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; } - p_buf = __pa(v_buf); + err = misc_register(&mmapper_dev); + if(err){ + printk(KERN_ERR "mmapper - misc_register failed, err = %d\n", + err); + goto out; + } - devfs_mk_cdev(MKDEV(30, 0), S_IFCHR|S_IRUGO|S_IWUGO, "mmapper"); - return(0); + p_buf = __pa(v_buf); +out: + return 0; } static void mmapper_exit(void) { + misc_deregister(&mmapper_dev); } module_init(mmapper_init); |