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aoe: describe the behavior of the "err" character device

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Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ed Cashin 2012-12-17 16:03:26 -08:00 committed by Linus Torvalds
parent 6e9766317f
commit 662a889608
1 changed files with 5 additions and 0 deletions
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5
drivers/block/aoe/aoechr.c
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@ -39,6 +39,11 @@ struct ErrMsg {
};
static DEFINE_MUTEX(aoechr_mutex);
/* 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 completion emsgs_comp;