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-rw-r--r--arch/Kconfig14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 53d7f619a1b9..8bf0fa652eb6 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -42,6 +42,20 @@ config KPROBES
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+config JUMP_LABEL
+ bool "Optimize trace point call sites"
+ depends on HAVE_ARCH_JUMP_LABEL
+ help
+ If it is detected that the compiler has support for "asm goto",
+ the kernel will compile trace point locations with just a
+ nop instruction. When trace points are enabled, the nop will
+ be converted to a jump to the trace function. This technique
+ lowers overhead and stress on the branch prediction of the
+ processor.
+
+ On i386, options added to the compiler flags may increase
+ the size of the kernel slightly.
+
config OPTPROBES
def_bool y
depends on KPROBES && HAVE_OPTPROBES

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