Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[~andy/linux] / arch / Kconfig

diff --git a/arch/Kconfig b/arch/Kconfig
index 185f8b0076436d75fb6896855cd2c4df0d1ed73c..ded747c7b74c32e66fa681d7e710528c23421f9e 100644 (file)
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -402,6 +402,16 @@ config HAVE_UNDERSCORE_SYMBOL_PREFIX
          Some architectures generate an _ in front of C symbols; things like
          module loading and assembly files need to know about this.
 
+config HAVE_IRQ_EXIT_ON_IRQ_STACK
+       bool
+       help
+         Architecture doesn't only execute the irq handler on the irq stack
+         but also irq_exit(). This way we can process softirqs on this irq
+         stack instead of switching to a new one when we call __do_softirq()
+         in the end of an hardirq.
+         This spares a stack switch and improves cache usage on softirq
+         processing.
+
 #
 # ABI hall of shame
 #