linux-kernel - [PATCH] HID: microsoft, do not use compound literal

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Message-Id: <1352711769-28911-1-git-send-email-jslaby@suse.cz>
Date:	Mon, 12 Nov 2012 10:16:09 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	jkosina@...e.cz
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com
Subject: [PATCH] HID: microsoft, do not use compound literal

In patch "HID: microsoft: fix invalid rdesc for 3k kbd" I fixed
support for MS 3k keyboards. However the added check using memcmp and
a compound statement breaks build on architectures where memcmp is a
macro with parameters. The error looks there like (m68k-linux-gnu-gcc
4.1.2):
hid-microsoft.c:51:18: error: macro "memcmp" passed 6 arguments, but takes just 3
hid-microsoft.c: In function ‘ms_report_fixup’:
drivers/hid/hid-microsoft.c:50: error: ‘memcmp’ undeclared (first use in this function)
hid-microsoft.c:50: error: (Each undeclared identifier is reported only once
/hid-microsoft.c:50: error: for each function it appears in.)

On x86_64, memcmp is a function, so I did not see the error.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
 drivers/hid/hid-microsoft.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
index f676c01..6fcd466 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -46,9 +46,9 @@ static __u8 *ms_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 		rdesc[559] = 0x45;
 	}
 	/* the same as above (s/usage/physical/) */
-	if ((quirks & MS_RDESC_3K) && *rsize == 106 &&
-			!memcmp((char []){ 0x19, 0x00, 0x29, 0xff },
-				&rdesc[94], 4)) {
+	if ((quirks & MS_RDESC_3K) && *rsize == 106 && rdesc[94] == 0x19 &&
+			rdesc[95] == 0x00 && rdesc[96] == 0x29 &&
+			rdesc[97] == 0xff) {
 		rdesc[94] = 0x35;
 		rdesc[96] = 0x45;
 	}
-- 
1.8.0

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