powerpc/smp: Make debugger_ipi_callback() static

debugger_ipi_callback() is a local routine used as a NMI IPI handler and
does not need to be external.

It fixes this W=1 compile error :

../arch/powerpc/kernel/smp.c:579:6: error: no previous prototype for ‘debugger_ipi_callback’ [-Werror=missing-prototypes]
  579 | void debugger_ipi_callback(struct pt_regs *regs)
      |      ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210104143206.695198-10-clg@kaod.org

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a96d90d..5a4d59a 100644 (file)
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -577,7 +577,7 @@ void tick_broadcast(const struct cpumask *mask)
 #endif
 
 #ifdef CONFIG_DEBUGGER
-void debugger_ipi_callback(struct pt_regs *regs)
+static void debugger_ipi_callback(struct pt_regs *regs)
 {
        debugger_ipi(regs);
 }