linux-kernel - [PATCH 2/2] crypto: mcryptd - use list_first_entry_or

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Date:	Mon, 16 Nov 2015 22:37:15 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>
Cc:	Geliang Tang <geliangtang@....com>, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] crypto: mcryptd - use list_first_entry_or_null()

Simplify mcryptd_opportunistic_flush() with list_first_entry_or_null().

Signed-off-by: Geliang Tang <geliangtang@....com>
---
 crypto/mcryptd.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/crypto/mcryptd.c b/crypto/mcryptd.c
index fe5b495a..f78d4fc 100644
--- a/crypto/mcryptd.c
+++ b/crypto/mcryptd.c
@@ -128,13 +128,9 @@ static void mcryptd_opportunistic_flush(void)
 	flist = per_cpu_ptr(mcryptd_flist, smp_processor_id());
 	while (single_task_running()) {
 		mutex_lock(&flist->lock);
-		if (list_empty(&flist->list)) {
-			mutex_unlock(&flist->lock);
-			return;
-		}
-		cstate = list_entry(flist->list.next,
+		cstate = list_first_entry_or_null(&flist->list,
 				struct mcryptd_alg_cstate, flush_list);
-		if (!cstate->flusher_engaged) {
+		if (!cstate || !cstate->flusher_engaged) {
 			mutex_unlock(&flist->lock);
 			return;
 		}
-- 
2.5.0


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