[PATCH] aoe: document the behavior of /dev/etherd/err

Ed L. Cashin
2007-12-26T20:35:19Z

drivers/block/aoe/aoechr.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/block/aoe/aoechr.c b/drivers/block/aoe/aoechr.c
index 2620073..871f284 100644
--- a/drivers/block/aoe/aoechr.c
+++ b/drivers/block/aoe/aoechr.c
@@ -33,6 +33,10 @@ struct ErrMsg {
char *msg;
};

+/* A ring buffer of error messages, to be read through
+ * "/dev/etherd/err". When no messages are present,
+ * readers will block waiting for messages to appear.
+ */
static struct ErrMsg emsgs[NMSG];
static int emsgs_head_idx, emsgs_tail_idx;
static struct semaphore emsgs_sema;
--
1.5.3.4