diff mbox series

[5.11,084/254] mm/highmem: fix CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP

Message ID 20210329075635.922676641@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH March 29, 2021, 7:56 a.m. UTC 
From: Ira Weiny <ira.weiny@intel.com>

commit 487cfade12fae0eb707bdce71c4d585128238a7d upstream.

The kernel test robot found that __kmap_local_sched_out() was not
correctly skipping the guard pages when DEBUG_KMAP_LOCAL_FORCE_MAP was
set.[1] This was due to DEBUG_HIGHMEM check being used.

Change the configuration check to be correct.

[1] https://lore.kernel.org/lkml/20210304083825.GB17830@xsang-OptiPlex-9020/

Link: https://lkml.kernel.org/r/20210318230657.1497881-1-ira.weiny@intel.com
Fixes: 0e91a0c6984c ("mm/highmem: Provide CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP")
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Oliver Sang <oliver.sang@intel.com>
Cc: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Cc: David Sterba <dsterba@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/highmem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/mm/highmem.c b/mm/highmem.c
index 86f2b9495f9c..6ef8f5e05e7e 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -618,7 +618,7 @@  void __kmap_local_sched_out(void)
 		int idx;
 
 		/* With debug all even slots are unmapped and act as guard */
-		if (IS_ENABLED(CONFIG_DEBUG_HIGHMEM) && !(i & 0x01)) {
+		if (IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL) && !(i & 0x01)) {
 			WARN_ON_ONCE(!pte_none(pteval));
 			continue;
 		}
@@ -654,7 +654,7 @@  void __kmap_local_sched_in(void)
 		int idx;
 
 		/* With debug all even slots are unmapped and act as guard */
-		if (IS_ENABLED(CONFIG_DEBUG_HIGHMEM) && !(i & 0x01)) {
+		if (IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL) && !(i & 0x01)) {
 			WARN_ON_ONCE(!pte_none(pteval));
 			continue;
 		}