From: Javier González <jg@lightnvm.io>
Date: Thu, 4 Feb 2016 14:13:24 +0000 (+0100)
Subject: lightnvm: warn if irqs are disabled in lock laddr
X-Git-Tag: v4.5-rc5~17^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bba7f40a029c1e2966146e3a021b3deaf5639904;p=platform%2Fkernel%2Flinux-exynos.git

lightnvm: warn if irqs are disabled in lock laddr

Add a warning if irqs are disabled when locking a new address in rrpc.
The typical path to a new request does not disable irqs, but this is not
guaranteed in the future.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
index ef13ac7..b0277cb 100644
--- a/drivers/lightnvm/rrpc.h
+++ b/drivers/lightnvm/rrpc.h
@@ -184,6 +184,8 @@ static int __rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
 	sector_t laddr_end = laddr + pages - 1;
 	struct rrpc_inflight_rq *rtmp;
 
+	WARN_ON(irqs_disabled());
+
 	spin_lock_irq(&rrpc->inflights.lock);
 	list_for_each_entry(rtmp, &rrpc->inflights.reqs, list) {
 		if (unlikely(request_intersects(rtmp, laddr, laddr_end))) {