linux-kernel - [PATCH] powerpc/msi: Fix compile error on mpc83xx

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Date:   Fri, 19 Oct 2018 06:12:50 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, radu.rendec@...il.com
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/msi: Fix compile error on mpc83xx

mpic_get_primary_version() is not defined when not using MPIC.
The compile error log like:

arch/powerpc/sysdev/built-in.o: In function `fsl_of_msi_probe':
fsl_msi.c:(.text+0x150c): undefined reference to `fsl_mpic_primary_get_version'

Signed-off-by: Jia Hongtao <hongtao.jia@...escale.com>
Signed-off-by: Scott Wood <scottwood@...escale.com>
Reported-by: Radu Rendec <radu.rendec@...il.com>
Fixes: 807d38b73b6 ("powerpc/mpic: Add get_version API both for internal and external use")
Cc: stable@...r.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/include/asm/mpic.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index fad8ddd697ac..0abf2e7fd222 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -393,7 +393,14 @@ extern struct bus_type mpic_subsys;
 #define	MPIC_REGSET_TSI108		MPIC_REGSET(1)	/* Tsi108/109 PIC */
 
 /* Get the version of primary MPIC */
+#ifdef CONFIG_MPIC
 extern u32 fsl_mpic_primary_get_version(void);
+#else
+static inline u32 fsl_mpic_primary_get_version(void)
+{
+	return 0;
+}
+#endif
 
 /* Allocate the controller structure and setup the linux irq descs
  * for the range if interrupts passed in. No HW initialization is
-- 
2.13.3