Commit cb67ea12 authored by Ryan Roberts's avatar Ryan Roberts Committed by Will Deacon
Browse files

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



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: f0f5863a ("arm64/mm: Remove PTE_PROT_NONE bit")
Reported-by: default avatarkernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405082221.43rfWxz5-lkp@intel.com/


Signed-off-by: default avatarRyan Roberts <ryan.roberts@arm.com>
Link: https://lore.kernel.org/r/20240509122844.563320-1-ryan.roberts@arm.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 5b32510a

arch/arm64/include/asm/pgtable.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */