irqchip/irq-pic32-evic: Add __maybe_unused for board_bind_eic_interrupt in COMPILE_TEST

There are a few ifdefs in this driver so that it can be compiled on all
architectures when COMPILE_TEST is set. board_bind_eic_interrupt is
defined in arch/mips/ for normal usage, however when this driver is
compiled with COMPILE_TEST on other architectures, it is defined as a
static variable inside this driver. This causes the following warning:

    drivers/irqchip/irq-pic32-evic.c:54:15: warning: variable
      'board_bind_eic_interrupt' set but not used [-Wunused-but-set-global]
          54 | static void (*board_bind_eic_interrupt)(int irq,
                                                       int regset);
             |               ^

Annotate the static variable with __maybe_unused to avoid having to put
even more ifdefs into this driver.

Fixes: 282f8b547d51d ("irqchip/irq-pic32-evic: Define board_bind_eic_interrupt for !MIPS builds")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260403-irq-pic32-evic-unused-v1-1-447cdc0675ec@redhat.com
Closes: https://lore.kernel.org/oe-kbuild-all/202603300715.4HuMMAFb-lkp@intel.com/

diff --git a/drivers/irqchip/irq-pic32-evic.c b/drivers/irqchip/irq-pic32-evic.c
index ecea7cb3ba849a3cbc96213d96f5090feafde5eb..3c48288c9e6c4e8001d28cb68c2edecfe36aa799 100644 (file)
--- a/drivers/irqchip/irq-pic32-evic.c
+++ b/drivers/irqchip/irq-pic32-evic.c
@@ -51,7 +51,7 @@ asmlinkage void __weak plat_irq_dispatch(void)
        do_domain_IRQ(evic_irq_domain, hwirq);
 }
 #else
-static void (*board_bind_eic_interrupt)(int irq, int regset);
+static __maybe_unused void (*board_bind_eic_interrupt)(int irq, int regset);
 #endif
 
 static struct evic_chip_data *irqd_to_priv(struct irq_data *data)