diff options
Diffstat (limited to 'arch/ia64/mm/fault.c')
| -rw-r--r-- | arch/ia64/mm/fault.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c index 30d0c1fca99e..3a4dec334cc5 100644 --- a/arch/ia64/mm/fault.c +++ b/arch/ia64/mm/fault.c @@ -15,7 +15,6 @@ #include <linux/prefetch.h> #include <linux/uaccess.h> -#include <asm/pgtable.h> #include <asm/processor.h> #include <asm/exception.h> @@ -29,6 +28,7 @@ static int mapped_kernel_page_is_present (unsigned long address) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *ptep, pte; @@ -37,7 +37,11 @@ mapped_kernel_page_is_present (unsigned long address) if (pgd_none(*pgd) || pgd_bad(*pgd)) return 0; - pud = pud_offset(pgd, address); + p4d = p4d_offset(pgd, address); + if (p4d_none(*p4d) || p4d_bad(*p4d)) + return 0; + + pud = pud_offset(p4d, address); if (pud_none(*pud) || pud_bad(*pud)) return 0; @@ -70,8 +74,8 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re mask = ((((isr >> IA64_ISR_X_BIT) & 1UL) << VM_EXEC_BIT) | (((isr >> IA64_ISR_W_BIT) & 1UL) << VM_WRITE_BIT)); - /* mmap_sem is performance critical.... */ - prefetchw(&mm->mmap_sem); + /* mmap_lock is performance critical.... */ + prefetchw(&mm->mmap_lock); /* * If we're in an interrupt or have no user context, we must not take the fault.. @@ -82,7 +86,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re #ifdef CONFIG_VIRTUAL_MEM_MAP /* * If fault is in region 5 and we are in the kernel, we may already - * have the mmap_sem (pfn_valid macro is called during mmap). There + * have the mmap_lock (pfn_valid macro is called during mmap). There * is no vma for region 5 addr's anyway, so skip getting the semaphore * and go directly to the exception handling code. */ @@ -102,7 +106,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re if (mask & VM_WRITE) flags |= FAULT_FLAG_WRITE; retry: - down_read(&mm->mmap_sem); + mmap_read_lock(mm); vma = find_vma_prev(mm, address, &prev_vma); if (!vma && !prev_vma ) @@ -169,7 +173,7 @@ retry: if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; - /* No need to up_read(&mm->mmap_sem) as we would + /* No need to mmap_read_unlock(mm) as we would * have already released it in __lock_page_or_retry * in mm/filemap.c. */ @@ -178,7 +182,7 @@ retry: } } - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); return; check_expansion: @@ -209,7 +213,7 @@ retry: goto good_area; bad_area: - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); #ifdef CONFIG_VIRTUAL_MEM_MAP bad_area_no_up: #endif @@ -275,7 +279,7 @@ retry: return; out_of_memory: - up_read(&mm->mmap_sem); + mmap_read_unlock(mm); if (!user_mode(regs)) goto no_context; pagefault_out_of_memory(); |