linux-kernel - [PATCH] accessibility/speakup/speakup_acnt: Add header file macro definition

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Date:   Tue,  5 Jul 2022 18:19:55 +0800
From:   Li zeming <zeming@...china.com>
To:     w.d.hubbs@...il.com, chris@...-brannons.com, kirk@...sers.ca,
        samuel.thibault@...-lyon.org
Cc:     speakup@...ux-speakup.org, linux-kernel@...r.kernel.org,
        Li zeming <zeming@...china.com>
Subject: [PATCH] accessibility/speakup/speakup_acnt: Add header file macro definition

I think the header file could avoid redefinition errors.
 at compile time by adding macro definitions.

Signed-off-by: Li zeming <zeming@...china.com>
---
 drivers/accessibility/speakup/speakup_acnt.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/accessibility/speakup/speakup_acnt.h b/drivers/accessibility/speakup/speakup_acnt.h
index cffa938ae580..cea05d770f6d 100644
--- a/drivers/accessibility/speakup/speakup_acnt.h
+++ b/drivers/accessibility/speakup/speakup_acnt.h
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* speakup_acntpc.h - header file for speakups Accent-PC driver. */
+#ifndef _SPEAKUP_ACNT_H
+#define _SPEAKUP_ACNT_H
 
 #define SYNTH_IO_EXTENT	0x02
 
@@ -17,3 +19,4 @@
 #define SYNTH_FULL	'F' /* synth is full. */
 #define SYNTH_ALMOST_EMPTY 'M' /* synth has less than 2 seconds of text left */
 #define SYNTH_SPEAKING	's' /* synth is speaking and has a fare way to go */
+#endif
-- 
2.18.2