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| author | Hiroaki SHIMODA <shimoda.hiroaki@gmail.com> | 2012-05-30 12:24:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-31 18:18:16 -0400 |
| commit | 0cfd32b736ae0c36b42697584811042726c07cba (patch) | |
| tree | 1e667905d1a668206875db4dc5eeb6d72a7c299d /lib/dynamic_queue_limits.c | |
| parent | 401453a31ea8192eb94f9337f5608de907681bfb (diff) | |
| download | lwn-0cfd32b736ae0c36b42697584811042726c07cba.tar.gz lwn-0cfd32b736ae0c36b42697584811042726c07cba.zip | |
bql: Fix POSDIFF() to integer overflow aware.
POSDIFF() fails to take into account integer overflow case.
Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Denys Fedoryshchenko <denys@visp.net.lb>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/dynamic_queue_limits.c')
| -rw-r--r-- | lib/dynamic_queue_limits.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/dynamic_queue_limits.c b/lib/dynamic_queue_limits.c index 6ab4587d052b..c87eb76f2fd4 100644 --- a/lib/dynamic_queue_limits.c +++ b/lib/dynamic_queue_limits.c @@ -10,7 +10,7 @@ #include <linux/jiffies.h> #include <linux/dynamic_queue_limits.h> -#define POSDIFF(A, B) ((A) > (B) ? (A) - (B) : 0) +#define POSDIFF(A, B) ((int)((A) - (B)) > 0 ? (A) - (B) : 0) /* Records completed count and recalculates the queue limit */ void dql_completed(struct dql *dql, unsigned int count) |