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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-11-18 20:48:39 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-11-24 14:42:08 +0100 |
| commit | 6e799cb69a70eedbb41561b750f7180c12cff280 (patch) | |
| tree | ee6b2c78fb94daef46d0da949e4bad4f2efdd070 /lib | |
| parent | 13c8da5db43ad6d9b8637295ff50ddb66a0af05f (diff) | |
| download | linux-6e799cb69a70eedbb41561b750f7180c12cff280.tar.bz2 | |
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 <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20201118204006.869487226@linutronix.de
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 8 |
1 files changed, 8 insertions, 0 deletions
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. |