diff options
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 7296360fc057..e544508e2a4b 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -62,6 +62,7 @@ void *high_memory; EXPORT_SYMBOL(high_memory); struct page *mem_map; unsigned long max_mapnr; +EXPORT_SYMBOL(max_mapnr); unsigned long highest_memmap_pfn; struct percpu_counter vm_committed_as; int sysctl_overcommit_memory = OVERCOMMIT_GUESS; /* heuristic overcommit */ @@ -1015,7 +1016,7 @@ static int validate_mmap_request(struct file *file, * device */ if (!file->f_op->get_unmapped_area) capabilities &= ~NOMMU_MAP_DIRECT; - if (!file->f_op->read) + if (!(file->f_mode & FMODE_CAN_READ)) capabilities &= ~NOMMU_MAP_COPY; /* The file shall have been opened with read permission. */ @@ -1213,11 +1214,9 @@ static int do_mmap_private(struct vm_area_struct *vma, if (sysctl_nr_trim_pages && total - point >= sysctl_nr_trim_pages) { total = point; kdebug("try to alloc exact %lu pages", total); - base = alloc_pages_exact(len, GFP_KERNEL); - } else { - base = (void *)__get_free_pages(GFP_KERNEL, order); } + base = alloc_pages_exact(total << PAGE_SHIFT, GFP_KERNEL); if (!base) goto enomem; @@ -1241,7 +1240,7 @@ static int do_mmap_private(struct vm_area_struct *vma, old_fs = get_fs(); set_fs(KERNEL_DS); - ret = vma->vm_file->f_op->read(vma->vm_file, base, len, &fpos); + ret = __vfs_read(vma->vm_file, base, len, &fpos); set_fs(old_fs); if (ret < 0) |