| commit | eb0bf929d5228ca0eb2758585f2e4e25aa20427e | [log] [tgz] |
|---|---|---|
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | Tue Oct 08 09:29:09 2013 +0200 |
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | Thu Oct 24 17:17:01 2013 +0200 |
| tree | 68b30c431a0418d31feaca8046a9deab86172b7e | |
| parent | 01997bbc924d63e6c4837c5d8dc190245bc473ec [diff] |
s390/gup: handle zero nr_pages case correctly If [__]get_user_pages_fast() gets called with nr_pages == 0, the current code would walk the page tables and pin as many pages until the first invalid pte (or the kernel crashed while writing struct page pointers to the pages array). So let's handle at least the nr_pages == 0 case correctly and exit early. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>