diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 17 | ||||
| -rw-r--r-- | mm/mmap.c | 4 | ||||
| -rw-r--r-- | mm/mremap.c | 7 | ||||
| -rw-r--r-- | mm/nommu.c | 3 | ||||
| -rw-r--r-- | mm/rmap.c | 2 | ||||
| -rw-r--r-- | mm/swapfile.c | 2 |
6 files changed, 24 insertions, 11 deletions
diff --git a/mm/memory.c b/mm/memory.c index 6bad4c4064e7..d209f745db7f 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1701,12 +1701,13 @@ static int do_swap_page(struct mm_struct * mm, spin_lock(&mm->page_table_lock); page_table = pte_offset_map(pmd, address); if (unlikely(!pte_same(*page_table, orig_pte))) { - pte_unmap(page_table); - spin_unlock(&mm->page_table_lock); - unlock_page(page); - page_cache_release(page); ret = VM_FAULT_MINOR; - goto out; + goto out_nomap; + } + + if (unlikely(!PageUptodate(page))) { + ret = VM_FAULT_SIGBUS; + goto out_nomap; } /* The page isn't present yet, go ahead with the fault. */ @@ -1741,6 +1742,12 @@ static int do_swap_page(struct mm_struct * mm, spin_unlock(&mm->page_table_lock); out: return ret; +out_nomap: + pte_unmap(page_table); + spin_unlock(&mm->page_table_lock); + unlock_page(page); + page_cache_release(page); + goto out; } /* diff --git a/mm/mmap.c b/mm/mmap.c index 01f9793591f6..63df2d698414 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1244,7 +1244,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, addr = mm->free_area_cache; /* make sure it can fit in the remaining address space */ - if (addr >= len) { + if (addr > len) { vma = find_vma(mm, addr-len); if (!vma || addr <= vma->vm_start) /* remember the address as a hint for next time */ @@ -1266,7 +1266,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, /* try just below the current vma->vm_start */ addr = vma->vm_start-len; - } while (len <= vma->vm_start); + } while (len < vma->vm_start); /* * A failed mmap() very likely causes application failure, diff --git a/mm/mremap.c b/mm/mremap.c index 0dd7ace94e51..ec7238a78f36 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -224,6 +224,12 @@ static unsigned long move_vma(struct vm_area_struct *vma, split = 1; } + /* + * if we failed to move page tables we still do total_vm increment + * since do_munmap() will decrement it by old_len == new_len + */ + mm->total_vm += new_len >> PAGE_SHIFT; + if (do_munmap(mm, old_addr, old_len) < 0) { /* OOM: unable to split vma, just get accounts right */ vm_unacct_memory(excess >> PAGE_SHIFT); @@ -237,7 +243,6 @@ static unsigned long move_vma(struct vm_area_struct *vma, vma->vm_next->vm_flags |= VM_ACCOUNT; } - mm->total_vm += new_len >> PAGE_SHIFT; __vm_stat_account(mm, vma->vm_flags, vma->vm_file, new_len>>PAGE_SHIFT); if (vm_flags & VM_LOCKED) { mm->locked_vm += new_len >> PAGE_SHIFT; diff --git a/mm/nommu.c b/mm/nommu.c index b293ec1cc4e6..c53e9c8f6b4a 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -150,7 +150,8 @@ void vfree(void *addr) kfree(addr); } -void *__vmalloc(unsigned long size, int gfp_mask, pgprot_t prot) +void *__vmalloc(unsigned long size, unsigned int __nocast gfp_mask, + pgprot_t prot) { /* * kmalloc doesn't like __GFP_HIGHMEM for some reason diff --git a/mm/rmap.c b/mm/rmap.c index 378de234c12b..a6203b4e1278 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -586,7 +586,7 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma) dec_mm_counter(mm, anon_rss); } - inc_mm_counter(mm, rss); + dec_mm_counter(mm, rss); page_remove_rmap(page); page_cache_release(page); diff --git a/mm/swapfile.c b/mm/swapfile.c index a60e0075d55b..da48405cd9a3 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -79,7 +79,7 @@ void swap_unplug_io_fn(struct backing_dev_info *unused_bdi, struct page *page) WARN_ON(page_count(page) <= 1); bdi = bdev->bd_inode->i_mapping->backing_dev_info; - bdi->unplug_io_fn(bdi, page); + blk_run_backing_dev(bdi, page); } up_read(&swap_unplug_sem); } |