diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 80c3fb3..8d8f525 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -395,12 +395,16 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_ return NULL; } -#ifdef CONFIG_DEBUG_VM + /* + * Add some anal sanity checks for now. Eventually, + * we should just do "return pfn_to_page(pfn)", but + * in the meantime we check that we get a valid pfn, + * and that the resulting page looks ok. + */ if (unlikely(!pfn_valid(pfn))) { print_bad_pte(vma, pte, addr); return NULL; } -#endif /* * NOTE! We still have PageReserved() pages in the page @@ -1067,6 +1071,8 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm, } if (pages) { pages[i] = page; + + flush_anon_page(page, start); flush_dcache_page(page); } if (vmas) @@ -2348,10 +2354,8 @@ int make_pages_present(unsigned long addr, unsigned long end) if (!vma) return -1; write = (vma->vm_flags & VM_WRITE) != 0; - if (addr >= end) - BUG(); - if (end > vma->vm_end) - BUG(); + BUG_ON(addr >= end); + BUG_ON(end > vma->vm_end); len = (end+PAGE_SIZE-1)/PAGE_SIZE-addr/PAGE_SIZE; ret = get_user_pages(current, current->mm, addr, len, write, 0, NULL, NULL); |
