c0d1217202
Provides a way for NMI reported errors on x86 to notify the EDAC subsystem pending ECC errors by writing to a software state variable. Here's the reworked patch. I added an EDAC stub to the kernel so we can have variables that are in the kernel even if EDAC is a module. I also implemented the idea of using the chip driver to select error detection mode via module parameter and eliminate the kernel compile option. Please review/test. Thx! Also, I only made changes to some of the chipset drivers since I am unfamiliar with the other ones. We can add similar changes as we go. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
42 lines
994 B
C
42 lines
994 B
C
/*
|
|
* common EDAC components that must be in kernel
|
|
*
|
|
* Author: Dave Jiang <djiang@mvista.com>
|
|
*
|
|
* 2007 (c) MontaVista Software, Inc. 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(edac_op_state);
|
|
|
|
atomic_t edac_handlers = ATOMIC_INIT(0);
|
|
EXPORT_SYMBOL(edac_handlers);
|
|
|
|
atomic_t edac_err_assert = ATOMIC_INIT(0);
|
|
EXPORT_SYMBOL(edac_err_assert);
|
|
|
|
inline int edac_handler_set(void)
|
|
{
|
|
if (edac_op_state == EDAC_OPSTATE_POLL)
|
|
return 0;
|
|
|
|
return atomic_read(&edac_handlers);
|
|
}
|
|
EXPORT_SYMBOL(edac_handler_set);
|
|
|
|
/*
|
|
* handler for NMI type of interrupts to assert error
|
|
*/
|
|
inline void edac_atomic_assert_error(void)
|
|
{
|
|
atomic_set(&edac_err_assert, 1);
|
|
}
|
|
EXPORT_SYMBOL(edac_atomic_assert_error);
|