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authorGraf Yang <graf.yang@analog.com>2010-03-17 09:00:32 +0000
committerMike Frysinger <vapier@gentoo.org>2010-05-22 14:19:04 -0400
commitc429886a7091f9d26dee7d01c20fd822f62c35e0 (patch)
tree081191e6274817d2f3d9bee8b27b1f8f145b939f
parent6ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13f (diff)
Blackfin: allow NMI watchdog to be used w/RETN as a scratch reg
NMIs are not safe to return from because many anomaly workarounds are implemented by disabling interrupts. The NMI obviously violates this assumption. Since the NMI watchdog never returns, we don't have to worry about it clobbering RETN when it is being used as a scratch register with the exception stack. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r--arch/blackfin/Kconfig.debug2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug
index 3c49f76b37bc..d1825cb24768 100644
--- a/arch/blackfin/Kconfig.debug
+++ b/arch/blackfin/Kconfig.debug
@@ -238,7 +238,7 @@ config EARLY_PRINTK
config NMI_WATCHDOG
bool "Enable NMI watchdog to help debugging lockup on SMP"
default n
- depends on (SMP && !BFIN_SCRATCH_REG_RETN)
+ depends on SMP
help
If any CPU in the system does not execute the period local timer
interrupt for more than 5 seconds, then the NMI handler dumps debug