Instead of playing with the address limit. This also gains us
validation of the kvec and proper atime updates.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
mm/nommu.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/mm/nommu.c b/mm/nommu.c
index fc184f597d59..379f1022bdea 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1164,17 +1164,8 @@ static int do_mmap_private(struct vm_area_struct *vma,
if (vma->vm_file) {
/* read the contents of a file into the copy */
- mm_segment_t old_fs;
- loff_t fpos;
-
- fpos = vma->vm_pgoff;
- fpos <<= PAGE_SHIFT;
-
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- ret = __vfs_read(vma->vm_file, base, len, &fpos);
- set_fs(old_fs);
-
+ loff_t fpos = vma->vm_pgoff << PAGE_SHIFT;
+ ret = kernel_read(vma->vm_file, base, len, &fpos);
if (ret < 0)
goto error_free;
--
2.11.0
