diff options
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 416a56b8e757..6a660858784b 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -226,7 +226,7 @@ static void force_shm_swapin_readahead(struct vm_area_struct *vma, struct address_space *mapping) { XA_STATE(xas, &mapping->i_pages, linear_page_index(vma, start)); - pgoff_t end_index = end / PAGE_SIZE; + pgoff_t end_index = linear_page_index(vma, end + PAGE_SIZE - 1); struct page *page; rcu_read_lock(); @@ -877,7 +877,6 @@ static long madvise_remove(struct vm_area_struct *vma, static int madvise_inject_error(int behavior, unsigned long start, unsigned long end) { - struct zone *zone; unsigned long size; if (!capable(CAP_SYS_ADMIN)) @@ -908,24 +907,13 @@ static int madvise_inject_error(int behavior, } else { pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n", pfn, start); - /* - * Drop the page reference taken by get_user_pages_fast(). In - * the absence of MF_COUNT_INCREASED the memory_failure() - * routine is responsible for pinning the page to prevent it - * from being released back to the page allocator. - */ - put_page(page); - ret = memory_failure(pfn, 0); + ret = memory_failure(pfn, MF_COUNT_INCREASED); } if (ret) return ret; } - /* Ensure that all poisoned pages are removed from per-cpu lists */ - for_each_populated_zone(zone) - drain_all_pages(zone); - return 0; } #endif @@ -1204,8 +1192,7 @@ SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec, goto put_pid; } - if (task->mm != current->mm && - !process_madvise_behavior_valid(behavior)) { + if (!process_madvise_behavior_valid(behavior)) { ret = -EINVAL; goto release_task; } @@ -1231,8 +1218,6 @@ SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec, ret = total_len - iov_iter_count(&iter); mmput(mm); - return ret; - release_task: put_task_struct(task); put_pid: |