[PATCH 34/36] tty: serial: pmac_zilog: Make disposable variable __always_unused

Lee Jones
2020-11-04T19:37:09Z

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@linuxfoundation.org>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-serial@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Lee Jones <lee.jones@linaro.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