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author | Dave Jiang <djiang@mvista.com> | 2007-07-19 01:49:46 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 10:04:53 -0700 |
commit | c0d121720220584bba2876b032e58a076b843fa1 (patch) | |
tree | 13ba24c6d875ded1494e1560f336b8551c663ef1 /drivers/edac/edac_stub.c | |
parent | 28f96eeafc89643d411d54c258788a8573576127 (diff) | |
download | linux-3.10-c0d121720220584bba2876b032e58a076b843fa1.tar.gz linux-3.10-c0d121720220584bba2876b032e58a076b843fa1.tar.bz2 linux-3.10-c0d121720220584bba2876b032e58a076b843fa1.zip |
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 <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>
Diffstat (limited to 'drivers/edac/edac_stub.c')
-rw-r--r-- | drivers/edac/edac_stub.c | 42 |
1 files changed, 42 insertions, 0 deletions
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 <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); |