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Commit 92641177 authored by Henrique de Moraes Holschuh's avatar Henrique de Moraes Holschuh Committed by Len Brown
Browse files

ACPI: thinkpad-acpi: use bitfields to hold subdriver flags 



Save some memory by using bitfields to hold boolean flags for the
subdrivers.

Signed-off-by: default avatarHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 0dcef77c

drivers/misc/thinkpad_acpi.c

+16 −16
Original line number Diff line number Diff line
@@ -339,7 +339,7 @@ static int __init setup_notify(struct ibm_struct *ibm) 
		}

		return -ENODEV;

	}

	ibm->notify_installed = 1;

	ibm->flags.notify_installed = 1;

	return 0;

}
@@ -372,7 +372,7 @@ static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 
		kfree(ibm->driver);

		ibm->driver = NULL;

	} else if (!ret)

		ibm->driver_registered = 1;

		ibm->flags.driver_registered = 1;



	return ret;

}
@@ -815,7 +815,7 @@ static struct ibm_struct wan_driver_data = { 
	.name = "wan",

	.read = wan_read,

	.write = wan_write,

	.experimental = 1,

	.flags.experimental = 1,

};



/*************************************************************************
@@ -1851,7 +1851,7 @@ static struct ibm_struct ecdump_driver_data = { 
	.name = "ecdump",

	.read = ecdump_read,

	.write = ecdump_write,

	.experimental = 1,

	.flags.experimental = 1,

};



/*************************************************************************
@@ -2684,7 +2684,7 @@ static struct ibm_struct fan_driver_data = { 
	.read = fan_read,

	.write = fan_write,

	.exit = fan_exit,

	.experimental = 1,

	.flags.experimental = 1,

};



/****************************************************************************
@@ -2725,7 +2725,7 @@ static int __init ibm_init(struct ibm_init_struct *iibm) 


	INIT_LIST_HEAD(&ibm->all_drivers);



	if (ibm->experimental && !experimental)

	if (ibm->flags.experimental && !experimental)

		return 0;



	dbg_printk(TPACPI_DBG_INIT,
@@ -2738,7 +2738,7 @@ static int __init ibm_init(struct ibm_init_struct *iibm) 
		if (ret)

			return ret;



		ibm->init_called = 1;

		ibm->flags.init_called = 1;

	}



	if (ibm->hid) {
@@ -2777,7 +2777,7 @@ static int __init ibm_init(struct ibm_init_struct *iibm) 
		entry->read_proc = &dispatch_read;

		if (ibm->write)

			entry->write_proc = &dispatch_write;

		ibm->proc_created = 1;

		ibm->flags.proc_created = 1;

	}



	list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
@@ -2799,33 +2799,33 @@ static void ibm_exit(struct ibm_struct *ibm) 


	list_del_init(&ibm->all_drivers);



	if (ibm->notify_installed) {

	if (ibm->flags.notify_installed) {

		dbg_printk(TPACPI_DBG_EXIT,

			"%s: acpi_remove_notify_handler\n", ibm->name);

		acpi_remove_notify_handler(*ibm->handle, ibm->type,

					   dispatch_notify);

		ibm->notify_installed = 0;

		ibm->flags.notify_installed = 0;

	}



	if (ibm->proc_created) {

	if (ibm->flags.proc_created) {

		dbg_printk(TPACPI_DBG_EXIT,

			"%s: remove_proc_entry\n", ibm->name);

		remove_proc_entry(ibm->name, proc_dir);

		ibm->proc_created = 0;

		ibm->flags.proc_created = 0;

	}



	if (ibm->driver_registered) {

	if (ibm->flags.driver_registered) {

		dbg_printk(TPACPI_DBG_EXIT,

			"%s: acpi_bus_unregister_driver\n", ibm->name);

		acpi_bus_unregister_driver(ibm->driver);

		kfree(ibm->driver);

		ibm->driver = NULL;

		ibm->driver_registered = 0;

		ibm->flags.driver_registered = 0;

	}



	if (ibm->init_called && ibm->exit) {

	if (ibm->flags.init_called && ibm->exit) {

		ibm->exit();

		ibm->init_called = 0;

		ibm->flags.init_called = 0;

	}



	dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);

drivers/misc/thinkpad_acpi.h

+7 −6
Original line number Diff line number Diff line
@@ -157,12 +157,13 @@ struct ibm_struct { 


	struct list_head all_drivers;



	int driver_registered;

	int proc_created;

	int init_called;

	int notify_installed;



	int experimental;

	struct {

		u8 driver_registered:1;

		u8 proc_created:1;

		u8 init_called:1;

		u8 notify_installed:1;

		u8 experimental:1;

	} flags;

};



struct ibm_init_struct {