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authorThomas Gleixner <tglx@linutronix.de>2020-11-18 20:48:39 +0100
committerThomas Gleixner <tglx@linutronix.de>2020-11-24 14:42:08 +0100
commit6e799cb69a70eedbb41561b750f7180c12cff280 (patch)
treeee6b2c78fb94daef46d0da949e4bad4f2efdd070 /mm/highmem.c
parent13c8da5db43ad6d9b8637295ff50ddb66a0af05f (diff)
downloadlinux-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 'mm/highmem.c')
-rw-r--r--mm/highmem.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/highmem.c b/mm/highmem.c
index 78c481a30c9a..fab128de97de 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -368,10 +368,10 @@ EXPORT_SYMBOL(kunmap_high);
static DEFINE_PER_CPU(int, __kmap_local_idx);
/*
- * With DEBUG_HIGHMEM the stack depth is doubled and every second
+ * With DEBUG_KMAP_LOCAL the stack depth is doubled and every second
* slot is unused which acts as a guard page
*/
-#ifdef CONFIG_DEBUG_HIGHMEM
+#ifdef CONFIG_DEBUG_KMAP_LOCAL
# define KM_INCR 2
#else
# define KM_INCR 1