From: Bart Van Assche <bart.vanassche@xxxxxxx>
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)) {
^
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxx>
Reviewed-by: Michael Lyle <mlyle@xxxxxxxx>
---
drivers/md/bcache/super.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 640ff8072ed8..d90d9e59ca00 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;
--
2.14.1
