linux-kernel - [PATCH 1/2] powerpc/kdump: Add missing optional dummy functions

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Date:   Mon, 12 Feb 2018 14:34:07 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:     Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        Balbir Singh <bsingharora@...il.com>,
        Nicholas Piggin <npiggin@...il.com>
Subject: [PATCH 1/2] powerpc/kdump: Add missing optional dummy functions

If KEXEC_CORE is not enabled, PowerNV builds fail as follows.

arch/powerpc/platforms/powernv/smp.c: In function 'pnv_smp_cpu_kill_self':
arch/powerpc/platforms/powernv/smp.c:236:4: error:
	implicit declaration of function 'crash_ipi_callback'

Add dummy function calls, similar to kdump_in_progress(), to solve the
problem.

Fixes: 4145f358644b ("powernv/kdump: Fix cases where the kdump kernel ...")
Cc: Balbir Singh <bsingharora@...il.com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Nicholas Piggin <npiggin@...il.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 arch/powerpc/include/asm/kexec.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index 9dcbfa6bbb91..d8b1e8e7e035 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -140,6 +140,12 @@ static inline bool kdump_in_progress(void)
 	return false;
 }
 
+static inline void crash_ipi_callback(struct pt_regs *regs) { }
+
+static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
+{
+}
+
 #endif /* CONFIG_KEXEC_CORE */
 #endif /* ! __ASSEMBLY__ */
 #endif /* __KERNEL__ */
-- 
2.7.4