linux-kernel - [PATCH 01/16] crypto: caam - Remove unnecessary smp_read_barrier

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Message-Id: <1415906662-4576-2-git-send-email-bobby.prani@gmail.com>
Date:	Thu, 13 Nov 2014 14:24:07 -0500
From:	Pranith Kumar <bobby.prani@...il.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Horia Geanta <horia.geanta@...escale.com>,
	Michael Neuling <mikey@...ling.org>,
	Kim Phillips <kim.phillips@...escale.com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Cristian Stoica <cristian.stoica@...escale.com>,
	linux-crypto@...r.kernel.org (open list:CRYPTO API),
	linux-kernel@...r.kernel.org (open list)
Cc:	paulmck@...ux.vnet.ibm.com
Subject: [PATCH 01/16] crypto: caam - Remove unnecessary smp_read_barrier_depends()

Recently lockless_dereference() was added which can be used in place of
hard-coding smp_read_barrier_depends(). The following PATCH makes the change.

Signed-off-by: Pranith Kumar <bobby.prani@...il.com>
---
 drivers/crypto/caam/jr.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
index bae20d8..9b3ef1bc 100644
--- a/drivers/crypto/caam/jr.c
+++ b/drivers/crypto/caam/jr.c
@@ -181,8 +181,6 @@ static void caam_jr_dequeue(unsigned long devarg)
 		for (i = 0; CIRC_CNT(head, tail + i, JOBR_DEPTH) >= 1; i++) {
 			sw_idx = (tail + i) & (JOBR_DEPTH - 1);
 
-			smp_read_barrier_depends();
-
 			if (jrp->outring[hw_idx].desc ==
 			    jrp->entinfo[sw_idx].desc_addr_dma)
 				break; /* found */
@@ -218,7 +216,6 @@ static void caam_jr_dequeue(unsigned long devarg)
 		if (sw_idx == tail) {
 			do {
 				tail = (tail + 1) & (JOBR_DEPTH - 1);
-				smp_read_barrier_depends();
 			} while (CIRC_CNT(head, tail, JOBR_DEPTH) >= 1 &&
 				 jrp->entinfo[tail].desc_addr_dma == 0);
 
-- 
1.9.1

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