From c0d121720220584bba2876b032e58a076b843fa1 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Thu, 19 Jul 2007 01:49:46 -0700 Subject: drivers/edac: add new nmi rescan 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 Signed-off-by: Douglas Thompson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/edac/edac_stub.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 drivers/edac/edac_stub.c (limited to 'drivers/edac/edac_stub.c') diff --git a/drivers/edac/edac_stub.c b/drivers/edac/edac_stub.c new file mode 100644 index 00000000000..91a038d2f65 --- /dev/null +++ b/drivers/edac/edac_stub.c @@ -0,0 +1,42 @@ +/* + * common EDAC components that must be in kernel + * + * Author: Dave Jiang + * + * 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 +#include +#include +#include + +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); -- cgit v1.2.3