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Commit 978547c5 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

sgi-gru: simplify procfs code 



Use remove_proc_subtree to remove the whole subtree on cleanup, and
unwind the registration loop into individual calls.  Switch to use
proc_create_seq where applicable.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent e7b087fc

drivers/misc/sgi-gru/gruprocfs.c

+14 −67
Original line number Diff line number Diff line
@@ -270,16 +270,6 @@ static int options_open(struct inode *inode, struct file *file) 
	return single_open(file, options_show, NULL);

}



static int cch_open(struct inode *inode, struct file *file)

{

	return seq_open(file, &cch_seq_ops);

}



static int gru_open(struct inode *inode, struct file *file)

{

	return seq_open(file, &gru_seq_ops);

}



/* *INDENT-OFF* */

static const struct file_operations statistics_fops = {

	.open 		= statistics_open,
@@ -305,73 +295,30 @@ static const struct file_operations options_fops = { 
	.release 	= single_release,

};



static const struct file_operations cch_fops = {

	.open 		= cch_open,

	.read 		= seq_read,

	.llseek 	= seq_lseek,

	.release 	= seq_release,

};

static const struct file_operations gru_fops = {

	.open 		= gru_open,

	.read 		= seq_read,

	.llseek 	= seq_lseek,

	.release 	= seq_release,

};



static struct proc_entry {

	char *name;

	umode_t mode;

	const struct file_operations *fops;

	struct proc_dir_entry *entry;

} proc_files[] = {

	{"statistics", 0644, &statistics_fops},

	{"mcs_statistics", 0644, &mcs_statistics_fops},

	{"debug_options", 0644, &options_fops},

	{"cch_status", 0444, &cch_fops},

	{"gru_status", 0444, &gru_fops},

	{NULL}

};

/* *INDENT-ON* */



static struct proc_dir_entry *proc_gru __read_mostly;



static int create_proc_file(struct proc_entry *p)

{

	p->entry = proc_create(p->name, p->mode, proc_gru, p->fops);

	if (!p->entry)

		return -1;

	return 0;

}



static void delete_proc_files(void)

{

	struct proc_entry *p;



	if (proc_gru) {

		for (p = proc_files; p->name; p++)

			if (p->entry)

				remove_proc_entry(p->name, proc_gru);

		proc_remove(proc_gru);

	}

}



int gru_proc_init(void)

{

	struct proc_entry *p;



	proc_gru = proc_mkdir("sgi_uv/gru", NULL);



	for (p = proc_files; p->name; p++)

		if (create_proc_file(p))

	if (!proc_gru)

		return -1;

	if (!proc_create("statistics", 0644, proc_gru, &statistics_fops))

		goto err;

	if (!proc_create("mcs_statistics", 0644, proc_gru, &mcs_statistics_fops))

		goto err;

	if (!proc_create("debug_options", 0644, proc_gru, &options_fops))

		goto err;

	if (!proc_create_seq("cch_status", 0444, proc_gru, &cch_seq_ops))

		goto err;

	if (!proc_create_seq("gru_status", 0444, proc_gru, &gru_seq_ops))

		goto err;

	return 0;



err:

	delete_proc_files();

	remove_proc_subtree("sgi_uv/gru", NULL);

	return -1;

}



void gru_proc_exit(void)

{

	delete_proc_files();

	remove_proc_subtree("sgi_uv/gru", NULL);

}