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[-next,2/4] riscv: mm: make pmd_bad() check leaf condition

Message ID 20210430082850.462609-3-sunnanyong@huawei.com (mailing list archive)
State New, archived
Headers show
Series THP supprt for RISCV | expand

Commit Message

Nanyong Sun April 30, 2021, 8:28 a.m. UTC 
In the definition in Documentation/vm/arch_pgtable_helpers.rst,
pmd_bad() means test a non-table mapped PMD, so it should also
return true when it is a leaf page.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
---
 arch/riscv/include/asm/pgtable.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index f489e412f..f7fc47c58 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -160,7 +160,7 @@  static inline int pmd_none(pmd_t pmd)
 
 static inline int pmd_bad(pmd_t pmd)
 {
-	return !pmd_present(pmd);
+	return !pmd_present(pmd) || (pmd_val(pmd) & _PAGE_LEAF);
 }
 
 #define pmd_leaf	pmd_leaf