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authorWill Deacon <will@kernel.org>2023-01-09 18:47:25 +0300
committerWill Deacon <will@kernel.org>2023-01-09 18:47:25 +0300
commit4e4ff23a35ee3a145fbc8378ecfeaab2d235cddd (patch)
tree244f7afdd7d0568898a302f32584f9e0f2dfe1dd /arch/arm64
parent5db568e748f6fb7d0d2e1bff4c2698ad4f50b982 (diff)
downloadlinux-4e4ff23a35ee3a145fbc8378ecfeaab2d235cddd.tar.xz
arm64/mm: Define dummy pud_user_exec() when using 2-level page-table
With only two levels of page-table, the generic 'pud_*' macros are implemented using dummy operations in pgtable-nopmd.h. Since commit 730a11f982e6 ("arm64/mm: add pud_user_exec() check in pud_user_accessible_page()"), pud_user_accessible_page() unconditionally calls pud_user_exec(), which is an arm64-specific helper and therefore isn't defined by pgtable-nopmd.h. This results in a build failure for configurations with only two levels of page table: arch/arm64/include/asm/pgtable.h: In function 'pud_user_accessible_page': >> arch/arm64/include/asm/pgtable.h:870:51: error: implicit declaration of function 'pud_user_exec'; did you mean 'pmd_user_exec'? [-Werror=implicit-function-declaration] 870 | return pud_leaf(pud) && (pud_user(pud) || pud_user_exec(pud)); | ^~~~~~~~~~~~~ | pmd_user_exec Fix the problem by defining pud_user_exec() as pud_user() in this case. Link: https://lore.kernel.org/r/202301080515.z6zEksU4-lkp@intel.com Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/include/asm/pgtable.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 02ed5c0adf97..65e78999c75d 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -730,6 +730,7 @@ static inline pmd_t *pud_pgtable(pud_t pud)
#else
#define pud_page_paddr(pud) ({ BUILD_BUG(); 0; })
+#define pud_user_exec(pud) pud_user(pud) /* Always 0 with folding */
/* Match pmd_offset folding in <asm/generic/pgtable-nopmd.h> */
#define pmd_set_fixmap(addr) NULL