[PATCH 2/2] LOOP_SET_CAPACITY sector_t may be narrow for bit-shfit
From: J. R. Okajima <hidden>
Date: 2009-01-07 06:14:15
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Fixing the bug pointed out by Andrew Morton, shift loff_t instead of sector_t since sector_t may be 32-bit. Signed-off-by: J. R. Okajima <hooanon05-/E1597aS9LR3+QwDJ9on6Q@public.gmane.org> --- drivers/block/loop.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index fcd28a7..eaed1fa 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c@@ -1171,7 +1171,9 @@ static int loop_set_capacity(struct loop_device *lo, struct block_device *bdev) if (unlikely(err)) goto out; sec = get_capacity(lo->lo_disk); - sz = sec << 9; + /* the width of sector_t may be narrow for bit-shift */ + sz = sec; + sz <<= 9; mutex_lock(&bdev->bd_mutex); bd_set_size(bdev, sz); mutex_unlock(&bdev->bd_mutex);
--
1.5.5.4.dirty
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