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| author | Adrian Hunter <adrian.hunter@intel.com> | 2024-03-25 08:40:07 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-04-08 15:03:06 +0200 |
| commit | 0c68458b0a5878d735572b4f4d91219a1db7c784 (patch) | |
| tree | 1f52897642d0b705b7dca467f5df1522d051c5c2 | |
| parent | 5b26ef660a690e424d9548fdf0565d4172d5d88f (diff) | |
| download | lwn-0c68458b0a5878d735572b4f4d91219a1db7c784.tar.gz lwn-0c68458b0a5878d735572b4f4d91219a1db7c784.zip | |
vdso: Add CONFIG_GENERIC_VDSO_OVERFLOW_PROTECT
Add CONFIG_GENERIC_VDSO_OVERFLOW_PROTECT in preparation to add
multiplication overflow protection to the VDSO time getter functions.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240325064023.2997-4-adrian.hunter@intel.com
| -rw-r--r-- | lib/vdso/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
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 |