linux-kernel - [PATCH v2 2/2] auxdisplay: panel: avoid gcc 8's Wstringop-truncation warning

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Message-ID: <20180801175815.GA25489@gmail.com>
Date:   Wed, 1 Aug 2018 19:58:15 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     Willy Tarreau <w@....eu>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Martin Sebor <msebor@...il.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Will Deacon <will.deacon@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Rientjes <rientjes@...gle.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v2 2/2] auxdisplay: panel: avoid gcc 8's Wstringop-truncation
 warning

Let gcc know it is not meant to be NUL-terminated by annotating with
the new __nonstring variable attribute; and remove the comment since it
conveys the same information.

Cc: Willy Tarreau <w@....eu>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Martin Sebor <msebor@...il.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
---
 drivers/auxdisplay/panel.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index 3b25a643058c..21b9b2f2470a 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -155,10 +155,9 @@ struct logical_input {
 			int release_data;
 		} std;
 		struct {	/* valid when type == INPUT_TYPE_KBD */
-			/* strings can be non null-terminated */
-			char press_str[sizeof(void *) + sizeof(int)];
-			char repeat_str[sizeof(void *) + sizeof(int)];
-			char release_str[sizeof(void *) + sizeof(int)];
+			char press_str[sizeof(void *) + sizeof(int)] __nonstring;
+			char repeat_str[sizeof(void *) + sizeof(int)] __nonstring;
+			char release_str[sizeof(void *) + sizeof(int)] __nonstring;
 		} kbd;
 	} u;
 };
-- 
2.17.1