diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 0e4eea10c7b0..1002f473f497 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -993,7 +993,6 @@ unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address, tlb_finish_mmu(tlb, address, end); return end; } -EXPORT_SYMBOL_GPL(zap_page_range); /** * zap_vma_ptes - remove ptes mapping the vma @@ -1111,7 +1110,6 @@ no_page_table: } return page; } -EXPORT_SYMBOL_GPL(follow_page); /* Can we do the FOLL_ANON optimization? */ static inline int use_zero_page(struct vm_area_struct *vma) @@ -1791,7 +1789,7 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, * not dirty accountable. */ if (PageAnon(old_page)) { - if (!TestSetPageLocked(old_page)) { + if (trylock_page(old_page)) { reuse = can_share_swap_page(old_page); unlock_page(old_page); } @@ -2767,16 +2765,26 @@ int make_pages_present(unsigned long addr, unsigned long end) vma = find_vma(current->mm, addr); if (!vma) - return -1; + return -ENOMEM; write = (vma->vm_flags & VM_WRITE) != 0; BUG_ON(addr >= end); BUG_ON(end > vma->vm_end); len = DIV_ROUND_UP(end, PAGE_SIZE) - addr/PAGE_SIZE; ret = get_user_pages(current, current->mm, addr, len, write, 0, NULL, NULL); - if (ret < 0) + if (ret < 0) { + /* + SUS require strange return value to mlock + - invalid addr generate to ENOMEM. + - out of memory should generate EAGAIN. + */ + if (ret == -EFAULT) + ret = -ENOMEM; + else if (ret == -ENOMEM) + ret = -EAGAIN; return ret; - return ret == len ? 0 : -1; + } + return ret == len ? 0 : -ENOMEM; } #if !defined(__HAVE_ARCH_GATE_AREA) |