linux-kernel - [PATCH] seqlock: fix raw_read_seqcount

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Message-ID: <20160521201448.GA7429@p183.telecom.by>
Date:	Sat, 21 May 2016 23:14:49 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	akpm@...ux-foundation.org
Cc:	peterz@...radead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] seqlock: fix raw_read_seqcount_latch()

lockless_dereference() is supposed to take pointer not integer.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 include/linux/seqlock.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -277,7 +277,7 @@ static inline void raw_write_seqcount_barrier(seqcount_t *s)
 
 static inline int raw_read_seqcount_latch(seqcount_t *s)
 {
-	return lockless_dereference(s->sequence);
+	return lockless_dereference(s)->sequence;
 }
 
 /**
@@ -331,7 +331,7 @@ static inline int raw_read_seqcount_latch(seqcount_t *s)
  *	unsigned seq, idx;
  *
  *	do {
- *		seq = lockless_dereference(latch->seq);
+ *		seq = lockless_dereference(latch)->seq;
  *
  *		idx = seq & 0x01;
  *		entry = data_query(latch->data[idx], ...);