diff options
Diffstat (limited to 'arch/arm64/mm/mmu.c')
| -rw-r--r-- | arch/arm64/mm/mmu.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 2368e4daa23d..d386033a074c 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1702,24 +1702,3 @@ static int __init prevent_bootmem_remove_init(void) } early_initcall(prevent_bootmem_remove_init); #endif - -pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) -{ - if (IS_ENABLED(CONFIG_ARM64_WORKAROUND_2645198) && - cpus_have_const_cap(ARM64_WORKAROUND_2645198)) { - /* - * Break-before-make (BBM) is required for all user space mappings - * when the permission changes from executable to non-executable - * in cases where cpu is affected with errata #2645198. - */ - if (pte_user_exec(READ_ONCE(*ptep))) - return ptep_clear_flush(vma, addr, ptep); - } - return ptep_get_and_clear(vma->vm_mm, addr, ptep); -} - -void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, - pte_t old_pte, pte_t pte) -{ - set_pte_at(vma->vm_mm, addr, ptep, pte); -} |