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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-03-19 03:36:33 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-03-19 05:15:20 +0300 |
| commit | 5f2b18ec8e1643410a2369f06888951cdedea0bf (patch) | |
| tree | 19fffc596284b0b162301b0020a2c873ee5d6ed5 /drivers/md | |
| parent | 20d3a518713e394efa5a899c84574b4b79ec5098 (diff) | |
| download | linux-5f2b18ec8e1643410a2369f06888951cdedea0bf.tar.xz | |
bcache: Fix a compiler warning in bcache_device_init()
Avoid that building with W=1 triggers the following compiler warning:
drivers/md/bcache/super.c:776:20: warning: comparison is always false due to limited range of data type [-Wtype-limits]
d->nr_stripes > SIZE_MAX / sizeof(atomic_t)) {
^
Reviewed-by: Coly Li <colyli@suse.de>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/super.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 06f4b4833755..a21694788619 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -778,6 +778,8 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size, sector_t sectors) { struct request_queue *q; + const size_t max_stripes = min_t(size_t, INT_MAX, + SIZE_MAX / sizeof(atomic_t)); size_t n; int idx; @@ -786,9 +788,7 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size, d->nr_stripes = DIV_ROUND_UP_ULL(sectors, d->stripe_size); - if (!d->nr_stripes || - d->nr_stripes > INT_MAX || - d->nr_stripes > SIZE_MAX / sizeof(atomic_t)) { + if (!d->nr_stripes || d->nr_stripes > max_stripes) { pr_err("nr_stripes too large or invalid: %u (start sector beyond end of disk?)", (unsigned)d->nr_stripes); return -ENOMEM; |