linux-kernel - [PATCH] tools lib subcmd: do not alias select() params

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Date:   Mon,  1 Jan 2018 19:56:26 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: [PATCH] tools lib subcmd: do not alias select() params

Use a separate fd set for select()-s exception fds param to
fix the following gcc warning:

pager.c:36:12: error: passing argument 2 to restrict-qualified
               parameter aliases with argument 4 [-Werror=restrict]
  select(1, &in, NULL, &in, NULL);
            ^~~        ~~~

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
---
 tools/lib/subcmd/pager.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/lib/subcmd/pager.c b/tools/lib/subcmd/pager.c
index 5ba754d17952..9997a8805a82 100644
--- a/tools/lib/subcmd/pager.c
+++ b/tools/lib/subcmd/pager.c
@@ -30,10 +30,13 @@ static void pager_preexec(void)
 	 * have real input
 	 */
 	fd_set in;
+	fd_set exception;
 
 	FD_ZERO(&in);
+	FD_ZERO(&exception);
 	FD_SET(0, &in);
-	select(1, &in, NULL, &in, NULL);
+	FD_SET(0, &exception);
+	select(1, &in, NULL, &exception, NULL);
 
 	setenv("LESS", "FRSX", 0);
 }
-- 
2.15.1