Add CONFIG_GENERIC_VDSO_OVERFLOW_PROTECT in preparation to add
multiplication overflow protection to the VDSO time getter functions.
Suggested-by: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Adrian Hunter <adrian.hun...@intel.com>
---
lib/vdso/Kconfig | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index d883ac299508..c46c2300517c 100644
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -30,4 +30,11 @@ config GENERIC_VDSO_TIME_NS
Selected by architectures which support time namespaces in the
VDSO
+config GENERIC_VDSO_OVERFLOW_PROTECT
+ bool
+ help
+ Select to add multiplication overflow protection to the VDSO
+ time getter functions for the price of an extra conditional
+ in the hotpath.
+
endif
--
2.34.1
