Commit d8d7c28e authored by Paolo 'Blaisorblade' Giarrusso's avatar Paolo 'Blaisorblade' Giarrusso Committed by Linus Torvalds
Browse files

[PATCH] uml ubd driver: various little changes 



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: default avatarPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 0bf16bff

arch/um/drivers/ubd_kern.c

+25 −19
Original line number Diff line number Diff line
@@ -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 @@ out: 
	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)

{

arch/um/include/mconsole_kern.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

arch/um/kernel/tt/tracer.c

+0 −1
Original line number Diff line number Diff line
@@ -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);

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