tree dfbba41ac9cfc88c2e20e32b41a857dba6357c07
parent ba38c27eb93e2d36bf940ca65c145f6e2aaa6d5c
author Chao Yu <yuchao0@huawei.com> 1485312759 +0800
committer Jaegeuk Kim <jaegeuk@kernel.org> 1487823891 -0800

f2fs: fix to avoid overflow when left shifting page offset

We use following method to calculate size with current page index:
size = index << PAGE_SHIFT
If type of index has only 32-bits size, left shifting will incur overflow,
which makes result incorrect.

So let's cast index with 64-bits type to avoid such issue.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>