linux-kernel - [PATCH] stating: lustre: fix sparse error: incompatible types in comparison expression

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Message-Id: <20170713021017.5368-1-rui.teng@linux.vnet.ibm.com>
Date:   Thu, 13 Jul 2017 10:10:17 +0800
From:   Rui Teng <rui.teng@...ux.vnet.ibm.com>
To:     Oleg Drokin <oleg.drokin@...el.com>,
        Andreas Dilger <andreas.dilger@...el.com>,
        James Simmons <jsimmons@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     lustre-devel@...ts.lustre.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org,
        Rui Teng <rui.teng@...ux.vnet.ibm.com>
Subject: [PATCH] stating: lustre: fix sparse error: incompatible types in comparison expression

Comparing two user space addresses to avoid sparse error:

drivers/staging//lustre/lnet/selftest/conrpc.c:490:30: error:
incompatible types in comparison expression (different address spaces)

Signed-off-by: Rui Teng <rui.teng@...ux.vnet.ibm.com>
---
 drivers/staging/lustre/lnet/selftest/conrpc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/lustre/lnet/selftest/conrpc.c b/drivers/staging/lustre/lnet/selftest/conrpc.c
index da36c55b86d3..ae7c2772825e 100644
--- a/drivers/staging/lustre/lnet/selftest/conrpc.c
+++ b/drivers/staging/lustre/lnet/selftest/conrpc.c
@@ -487,10 +487,9 @@ lstcon_rpc_trans_interpreter(struct lstcon_rpc_trans *trans,
 				   sizeof(struct list_head)))
 			return -EFAULT;
 
-		if (tmp.next == head_up)
-			return 0;
-
 		next = tmp.next;
+		if (next == head_up)
+			return 0;
 
 		ent = list_entry(next, struct lstcon_rpc_ent, rpe_link);
 
-- 
2.11.0