linux-kernel - [PATCH 34/36] tty: serial: pmac_zilog: Make disposable variable __always

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Message-Id: <20201104193549.4026187-35-lee.jones@linaro.org>
Date:   Wed,  4 Nov 2020 19:35:47 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linux-serial@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 34/36] tty: serial: pmac_zilog: Make disposable variable __always_unused

Fixes the following W=1 kernel build warning(s):

 drivers/tty/serial/pmac_zilog.h:365:58: warning: variable ‘garbage’ set but not used [-Wunused-but-set-variable]

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jirislaby@...nel.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: linux-serial@...r.kernel.org
Cc: linuxppc-dev@...ts.ozlabs.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/tty/serial/pmac_zilog.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/pmac_zilog.h b/drivers/tty/serial/pmac_zilog.h
index bb874e76810e0..968aec7c1cf82 100644
--- a/drivers/tty/serial/pmac_zilog.h
+++ b/drivers/tty/serial/pmac_zilog.h
@@ -362,7 +362,7 @@ static inline void zssync(struct uart_pmac_port *port)
 
 /* Misc macros */
 #define ZS_CLEARERR(port)    (write_zsreg(port, 0, ERR_RES))
-#define ZS_CLEARFIFO(port)   do { volatile unsigned char garbage; \
+#define ZS_CLEARFIFO(port)   do { volatile unsigned char __always_unused garbage; \
 				     garbage = read_zsdata(port); \
 				     garbage = read_zsdata(port); \
 				     garbage = read_zsdata(port); \
-- 
2.25.1