linux-kernel - [PATCH] serial: txx9: Add missing #include <asm/txx9/generic.h>

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Date: Tue, 23 Jan 2024 21:09:15 +0100
From: Geert Uytterhoeven <geert+renesas@...der.be>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Johan Hovold <johan@...nel.org>
Cc: linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] serial: txx9: Add missing #include <asm/txx9/generic.h>

drivers/tty/serial/serial_txx9.c:933:12: error: no previous prototype for ‘early_serial_txx9_setup’ [-Werror=missing-prototypes]
  933 | int __init early_serial_txx9_setup(struct uart_port *port)
      |            ^~~~~~~~~~~~~~~~~~~~~~~

This function is called from arch/mips/txx9/generic/setup.c, and does
have a forward declaration in arch/mips/include/asm/txx9/generic.h.

As the TXX9 serial driver does not support compile-testing, and thus can
only be built on MIPS, fix this by including the MIPS-only header file.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
Note that the initial version of commit 8720037d55dbfa30 ("serial:
extend compile-test coverage") did enable compile-testing for
SERIAL_TXX9, but that was dropped later, cfr. the discussion in the
thread at
https://lore.kernel.org/all/CAMuHMdXKWDB89Hm-LQcpfTq=0yjm_xvQsQiD4QuEtW=yVymuRw@mail.gmail.com
---
 drivers/tty/serial/serial_txx9.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c
index e1897894a4ef58cb..abba397229581851 100644
--- a/drivers/tty/serial/serial_txx9.c
+++ b/drivers/tty/serial/serial_txx9.c
@@ -23,9 +23,10 @@
 #include <linux/serial.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
-
 #include <linux/io.h>
 
+#include <asm/txx9/generic.h>
+
 #define PASS_LIMIT	256
 
 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
-- 
2.34.1