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| author | Ira Weiny <ira.weiny@intel.com> | 2021-03-24 21:37:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-03-25 09:22:55 -0700 |
| commit | 487cfade12fae0eb707bdce71c4d585128238a7d (patch) | |
| tree | ff41123d559a876ff4a4e3a4d6a3e2f7615dabb8 /mm/highmem.c | |
| parent | a024b7c2850dddd01e65b8270f0971deaf272f27 (diff) | |
| download | linux-487cfade12fae0eb707bdce71c4d585128238a7d.tar.gz linux-487cfade12fae0eb707bdce71c4d585128238a7d.tar.bz2 linux-487cfade12fae0eb707bdce71c4d585128238a7d.zip | |
mm/highmem: fix CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP
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>
Diffstat (limited to 'mm/highmem.c')
| -rw-r--r-- | mm/highmem.c | 4 |
1 files changed, 2 insertions, 2 deletions
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; } |