linux-kernel - [PATCH 4.4 072/160] powerpc/msi: Fix compile error on mpc83xx

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Date:   Mon, 19 Nov 2018 17:28:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jia Hongtao <hongtao.jia@...escale.com>,
        Scott Wood <scottwood@...escale.com>,
        Radu Rendec <radu.rendec@...il.com>,
        Christophe Leroy <christophe.leroy@....fr>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH 4.4 072/160] powerpc/msi: Fix compile error on mpc83xx

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe Leroy <christophe.leroy@....fr>

commit 0f99153def98134403c9149128e59d3e1786cf04 upstream.

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>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/powerpc/include/asm/mpic.h |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -392,7 +392,14 @@ 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