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[PATCH] uml ubd driver: various little changes

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Fix a small memory leak in ubd_config, and clearify the confusion which lead
to it.

Then, some little changes not affecting operations -
* move init functions together,
* add a comment about a potential problem in case of some evolution in the block layer,
* mark all initcalls as static __init functions
* mark an used once little function as inline
* document that mconsole methods are all called in process context (was
  triggered when checking ubd mconsole methods).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso 2006-10-30 22:07:12 -08:00 committed by Linus Torvalds
parent 0bf16bffee
commit d8d7c28ec0
3 changed files with 26 additions and 20 deletions
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44
arch/um/drivers/ubd_kern.c
View File

@ -202,17 +202,6 @@ struct ubd {
struct ubd ubd_devs[MAX_DEV] = { [ 0 ... MAX_DEV - 1 ] = DEFAULT_UBD };
static int ubd0_init(void)
{
struct ubd *ubd_dev = &ubd_devs[0];
if(ubd_dev->file == NULL)
ubd_dev->file = "root_fs";
return(0);
}
__initcall(ubd0_init);
/* Only changed by fake_ide_setup which is a setup */
static int fake_ide = 0;
static struct proc_dir_entry *proc_ide_root = NULL;
@ -293,6 +282,10 @@ static int parse_unit(char **ptr)
return(n);
}
/* If *index_out == -1 at exit, the passed option was a general one;
* otherwise, the str pointer is used (and owned) inside ubd_devs array, so it
* should not be freed on exit.
*/
static int ubd_setup_common(char *str, int *index_out)
{
struct ubd *ubd_dev;
@ -480,8 +473,9 @@ int thread_fd = -1;
/* Changed by ubd_handler, which is serialized because interrupts only
* happen on CPU 0.
* XXX: currently unused.
*/
int intr_count = 0;
static int intr_count = 0;
/* call ubd_finish if you need to serialize */
static void __ubd_finish(struct request *req, int error)
@ -554,7 +548,7 @@ void kill_io_thread(void)
__uml_exitcall(kill_io_thread);
static int ubd_file_size(struct ubd *ubd_dev, __u64 *size_out)
static inline int ubd_file_size(struct ubd *ubd_dev, __u64 *size_out)
{
char *file;
@ -724,7 +718,7 @@ static int ubd_config(char *str)
}
if (n == -1) {
ret = 0;
goto out;
goto err_free;
}
mutex_lock(&ubd_lock);
@ -821,6 +815,7 @@ static int ubd_remove(int n)
return err;
}
/* All these are called by mconsole in process context and without ubd-specific locks. */
static struct mc_device ubd_mc = {
.name = "ubd",
.config = ubd_config,
@ -829,7 +824,7 @@ static struct mc_device ubd_mc = {
.remove = ubd_remove,
};
static int ubd_mc_init(void)
static int __init ubd_mc_init(void)
{
mconsole_register_dev(&ubd_mc);
return 0;
@ -837,13 +832,24 @@ static int ubd_mc_init(void)
__initcall(ubd_mc_init);
static int __init ubd0_init(void)
{
struct ubd *ubd_dev = &ubd_devs[0];
if(ubd_dev->file == NULL)
ubd_dev->file = "root_fs";
return(0);
}
__initcall(ubd0_init);
static struct platform_driver ubd_driver = {
.driver = {
.name = DRIVER_NAME,
},
};
int ubd_init(void)
static int __init ubd_init(void)
{
int i;
@ -871,7 +877,7 @@ int ubd_init(void)
late_initcall(ubd_init);
int ubd_driver_init(void){
static int __init ubd_driver_init(void){
unsigned long stack;
int err;
@ -1378,8 +1384,8 @@ void do_io(struct io_thread_req *req)
*/
int kernel_fd = -1;
/* Only changed by the io thread */
int io_count = 0;
/* Only changed by the io thread. XXX: currently unused. */
static int io_count = 0;
int io_thread(void *arg)
{

1
arch/um/include/mconsole_kern.h
View File

@ -14,6 +14,7 @@ struct mconsole_entry {
struct mc_request request;
};
/* All these methods are called in process context. */
struct mc_device {
struct list_head list;
char *name;

1
arch/um/kernel/tt/tracer.c
View File

@ -176,7 +176,6 @@ struct {
int signal_index[32];
int nsignals = 0;
int debug_trace = 0;
extern int io_nsignals, io_count, intr_count;
extern void signal_usr1(int sig);