From 6e799cb69a70eedbb41561b750f7180c12cff280 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 18 Nov 2020 20:48:39 +0100 Subject: mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCAL CONFIG_KMAP_LOCAL can be enabled by x86/32bit even if CONFIG_HIGHMEM is not enabled for temporary MMIO space mappings. Provide it as a seperate config option which depends on CONFIG_KMAP_LOCAL and let CONFIG_DEBUG_HIGHMEM select it. This won't increase the debug coverage of this significantly but it paves the way to do so. Signed-off-by: Thomas Gleixner Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20201118204006.869487226@linutronix.de --- lib/Kconfig.debug | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c789b39ed527..f24fa158f9db 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -849,9 +849,17 @@ config DEBUG_PER_CPU_MAPS Say N if unsure. +config DEBUG_KMAP_LOCAL + bool "Debug kmap_local temporary mappings" + depends on DEBUG_KERNEL && KMAP_LOCAL + help + This option enables additional error checking for the kmap_local + infrastructure. Disable for production use. + config DEBUG_HIGHMEM bool "Highmem debugging" depends on DEBUG_KERNEL && HIGHMEM + select DEBUG_KMAP_LOCAL help This option enables additional error checking for high memory systems. Disable for production systems. -- cgit v1.2.3