mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
30e1f7a812
Move toplevel sysfs class to the stub and make it available to non-modularized code too. Add proper refcounting of its users and move the registration functionality into the reference counting routines. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/*
|
|
* common EDAC components that must be in kernel
|
|
*
|
|
* Author: Dave Jiang <djiang@mvista.com>
|
|
*
|
|
* 2007 (c) MontaVista Software, Inc.
|
|
* 2010 (c) Advanced Micro Devices Inc.
|
|
* Borislav Petkov <borislav.petkov@amd.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/edac.h>
|
|
#include <asm/atomic.h>
|
|
#include <asm/edac.h>
|
|
|
|
int edac_op_state = EDAC_OPSTATE_INVAL;
|
|
EXPORT_SYMBOL_GPL(edac_op_state);
|
|
|
|
atomic_t edac_handlers = ATOMIC_INIT(0);
|
|
EXPORT_SYMBOL_GPL(edac_handlers);
|
|
|
|
int edac_err_assert = 0;
|
|
EXPORT_SYMBOL_GPL(edac_err_assert);
|
|
|
|
static atomic_t edac_class_valid = ATOMIC_INIT(0);
|
|
|
|
/*
|
|
* called to determine if there is an EDAC driver interested in
|
|
* knowing an event (such as NMI) occurred
|
|
*/
|
|
int edac_handler_set(void)
|
|
{
|
|
if (edac_op_state == EDAC_OPSTATE_POLL)
|
|
return 0;
|
|
|
|
return atomic_read(&edac_handlers);
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_handler_set);
|
|
|
|
/*
|
|
* handler for NMI type of interrupts to assert error
|
|
*/
|
|
void edac_atomic_assert_error(void)
|
|
{
|
|
edac_err_assert++;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_atomic_assert_error);
|
|
|
|
/*
|
|
* sysfs object: /sys/devices/system/edac
|
|
* need to export to other files
|
|
*/
|
|
struct sysdev_class edac_class = {
|
|
.name = "edac",
|
|
};
|
|
EXPORT_SYMBOL_GPL(edac_class);
|
|
|
|
/* return pointer to the 'edac' node in sysfs */
|
|
struct sysdev_class *edac_get_sysfs_class(void)
|
|
{
|
|
int err = 0;
|
|
|
|
if (atomic_read(&edac_class_valid))
|
|
goto out;
|
|
|
|
/* create the /sys/devices/system/edac directory */
|
|
err = sysdev_class_register(&edac_class);
|
|
if (err) {
|
|
printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
|
|
return NULL;
|
|
}
|
|
|
|
out:
|
|
atomic_inc(&edac_class_valid);
|
|
return &edac_class;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_get_sysfs_class);
|
|
|
|
void edac_put_sysfs_class(void)
|
|
{
|
|
/* last user unregisters it */
|
|
if (atomic_dec_and_test(&edac_class_valid))
|
|
sysdev_class_unregister(&edac_class);
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_put_sysfs_class);
|