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arm64/mm: Fix pud_user_accessible_page() for PGTABLE_LEVELS <= 2

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The recent change to use pud_valid() as part of the implementation of
pud_user_accessible_page() fails to build when PGTABLE_LEVELS <= 2
because pud_valid() is not defined in that case.

Fix this by defining pud_valid() to false for this case. This means that
pud_user_accessible_page() will correctly always return false for this
config.

Fixes: f0f5863a0f ("arm64/mm: Remove PTE_PROT_NONE bit")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405082221.43rfWxz5-lkp@intel.com/
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Link: https://lore.kernel.org/r/20240509122844.563320-1-ryan.roberts@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Ryan Roberts 2024-05-09 13:28:42 +01:00 committed by Will Deacon
parent 5b32510af7
commit cb67ea121c
1 changed files with 1 additions and 0 deletions
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arch/arm64/include/asm/pgtable.h
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@ -814,6 +814,7 @@ static inline pmd_t *pud_pgtable(pud_t pud)
#else
#define pud_valid(pud) false
#define pud_page_paddr(pud) ({ BUILD_BUG(); 0; })
#define pud_user_exec(pud) pud_user(pud) /* Always 0 with folding */