linux-kernel - [RFC PATCH] powerpc: udbg: export udbg

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230513055804.23775-1-rdunlap@infradead.org>
Date:   Fri, 12 May 2023 22:58:04 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org, Arnd Bergmann <arnd@...db.de>,
        Pali Rohár <pali@...nel.org>
Subject: [RFC PATCH] powerpc: udbg: export udbg_putc

In a randconfig with CONFIG_SERIAL_CPM=m and
CONFIG_PPC_EARLY_DEBUG_CPM=y, there is a build error:
ERROR: modpost: "udbg_putc" [drivers/tty/serial/cpm_uart/cpm_uart.ko] undefined!

The build can be fixed by exporting "udbg_putc" in udbg.c.

OTOH, maybe something like this is more appropriate in
arch/powerpc/Kconfig.debug?

config PPC_EARLY_DEBUG_CPM
	bool "Early serial debugging for Freescale CPM-based serial ports"
-	depends on SERIAL_CPM
+	depends on SERIAL_CPM=y

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Nicholas Piggin <npiggin@...il.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: Arnd Bergmann <arnd@...db.de>
Cc: "Pali Rohár" <pali@...nel.org>
---
 arch/powerpc/kernel/udbg.c |    1 +
 1 file changed, 1 insertion(+)

diff -- a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -14,6 +14,7 @@
 #include <asm/udbg.h>
 
 void (*udbg_putc)(char c);
+EXPORT_SYMBOL(udbg_putc);
 void (*udbg_flush)(void);
 int (*udbg_getc)(void);
 int (*udbg_getc_poll)(void);