diff options
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/fault.c | 4 | ||||
| -rw-r--r-- | arch/s390/mm/gmap.c | 1 | ||||
| -rw-r--r-- | arch/s390/mm/pgtable.c | 29 |
3 files changed, 12 insertions, 22 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index ab4098886e56..ac4c78546d97 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -280,7 +280,6 @@ static void do_sigbus(struct pt_regs *regs) static void do_exception(struct pt_regs *regs, int access) { struct vm_area_struct *vma; - struct task_struct *tsk; unsigned long address; struct mm_struct *mm; enum fault_type type; @@ -289,7 +288,6 @@ static void do_exception(struct pt_regs *regs, int access) vm_fault_t fault; bool is_write; - tsk = current; /* * The instruction that caused the program check has * been nullified. Don't signal single step via SIGTRAP. @@ -297,7 +295,7 @@ static void do_exception(struct pt_regs *regs, int access) clear_thread_flag(TIF_PER_TRAP); if (kprobe_page_fault(regs, 14)) return; - mm = tsk->mm; + mm = current->mm; address = get_fault_address(regs); is_write = fault_is_write(regs); type = get_fault_type(regs); diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index 6f96b5a71c63..8da39deb56ca 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -1691,6 +1691,7 @@ struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce, return ERR_PTR(-ENOMEM); new->mm = parent->mm; new->parent = gmap_get(parent); + new->private = parent->private; new->orig_asce = asce; new->edat_level = edat_level; new->initialized = false; diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 5cb92941540b..99422926efe1 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -125,32 +125,23 @@ static inline pte_t ptep_flush_lazy(struct mm_struct *mm, static inline pgste_t pgste_get_lock(pte_t *ptep) { - unsigned long new = 0; + unsigned long value = 0; #ifdef CONFIG_PGSTE - unsigned long old; - - asm( - " lg %0,%2\n" - "0: lgr %1,%0\n" - " nihh %0,0xff7f\n" /* clear PCL bit in old */ - " oihh %1,0x0080\n" /* set PCL bit in new */ - " csg %0,%1,%2\n" - " jl 0b\n" - : "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE]) - : "Q" (ptep[PTRS_PER_PTE]) : "cc", "memory"); + unsigned long *ptr = (unsigned long *)(ptep + PTRS_PER_PTE); + + do { + value = __atomic64_or_barrier(PGSTE_PCL_BIT, ptr); + } while (value & PGSTE_PCL_BIT); + value |= PGSTE_PCL_BIT; #endif - return __pgste(new); + return __pgste(value); } static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste) { #ifdef CONFIG_PGSTE - asm( - " nihh %1,0xff7f\n" /* clear PCL bit */ - " stg %1,%0\n" - : "=Q" (ptep[PTRS_PER_PTE]) - : "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE]) - : "cc", "memory"); + barrier(); + WRITE_ONCE(*(unsigned long *)(ptep + PTRS_PER_PTE), pgste_val(pgste) & ~PGSTE_PCL_BIT); #endif } |