diff options
Diffstat (limited to 'mm/process_vm_access.c')
| -rw-r--r-- | mm/process_vm_access.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index 5d453e58ddbf..1b5a6104c5fc 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -88,19 +88,23 @@ static int process_vm_rw_single_vec(unsigned long addr, ssize_t rc = 0; unsigned long max_pages_per_loop = PVM_MAX_KMALLOC_PAGES / sizeof(struct pages *); + unsigned int flags = 0; /* Work out address and page range required */ if (len == 0) return 0; nr_pages = (addr + len - 1) / PAGE_SIZE - addr / PAGE_SIZE + 1; + if (vm_write) + flags |= FOLL_WRITE; + while (!rc && nr_pages && iov_iter_count(iter)) { int pages = min(nr_pages, max_pages_per_loop); size_t bytes; /* Get the pages we're interested in */ pages = get_user_pages_unlocked(task, mm, pa, pages, - vm_write, 0, process_pages); + process_pages, flags); if (pages <= 0) return -EFAULT; |