From: Arnd Bergmann <arnd@arndb.de>

armada_370_xp_msi_reenable_percpu is only defined when CONFIG_PCI_MSI
is enabled, and only called when SMP is enabled.

Without CONFIG_SMP, there are no callers, so we get a build time
warning instead:

drivers/irqchip/irq-armada-370-xp.c:319:13: error: 'armada_370_xp_msi_reenable_percpu' defined but not used [-Werror=unused-function]
  319 | static void armada_370_xp_msi_reenable_percpu(void) {}
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Mark the function as __maybe_unused to avoid adding more complexity
to the #ifdefs.

Fixes: 8ca61cde32c1 ("irqchip/armada-370-xp: Enable MSI affinity configuration")
Link: https://lore.kernel.org/lkml/20221215170202.2441960-1-arnd@kernel.org/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
I noticed this never got applied, and the warning still remains.
---
 drivers/irqchip/irq-armada-370-xp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index a55528469278..4b021a67bdfe 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -316,7 +316,7 @@ static int armada_370_xp_msi_init(struct device_node *node,
 	return 0;
 }
 #else
-static void armada_370_xp_msi_reenable_percpu(void) {}
+static __maybe_unused void armada_370_xp_msi_reenable_percpu(void) {}
 
 static inline int armada_370_xp_msi_init(struct device_node *node,
 					 phys_addr_t main_int_phys_base)
-- 
2.39.2

On Fri, Mar 22, 2024 at 01:58:25PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> armada_370_xp_msi_reenable_percpu is only defined when CONFIG_PCI_MSI
> is enabled, and only called when SMP is enabled.
> 
> Without CONFIG_SMP, there are no callers, so we get a build time
> warning instead:
> 
> drivers/irqchip/irq-armada-370-xp.c:319:13: error: 'armada_370_xp_msi_reenable_percpu' defined but not used [-Werror=unused-function]
>   319 | static void armada_370_xp_msi_reenable_percpu(void) {}
>       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Mark the function as __maybe_unused to avoid adding more complexity
> to the #ifdefs.
> 
> Fixes: 8ca61cde32c1 ("irqchip/armada-370-xp: Enable MSI affinity configuration")
> Link: https://lore.kernel.org/lkml/20221215170202.2441960-1-arnd@kernel.org/
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

The following commit has been merged into the irq/urgent branch of tip:

Commit-ID:     9e81e329508576b499b5c47ab106b5fa45ce96d9
Gitweb:        https://git.kernel.org/tip/9e81e329508576b499b5c47ab106b5fa45ce96d9
Author:        Arnd Bergmann <arnd@arndb.de>
AuthorDate:    Fri, 22 Mar 2024 13:58:25 +01:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Tue, 26 Mar 2024 02:12:16 +01:00

irqchip/armada-370-xp: Suppress unused-function warning

armada_370_xp_msi_reenable_percpu() is only defined when CONFIG_PCI_MSI is
enabled, and only called when SMP is enabled.

Without CONFIG_SMP, there are no callers, which results in a build time
warning instead:

drivers/irqchip/irq-armada-370-xp.c:319:13: error: 'armada_370_xp_msi_reenable_percpu' defined but not used [-Werror=unused-function]
  319 | static void armada_370_xp_msi_reenable_percpu(void) {}
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Mark the function as __maybe_unused to avoid adding more complexity
to the #ifdefs.

Fixes: 8ca61cde32c1 ("irqchip/armada-370-xp: Enable MSI affinity configuration")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20240322125838.901649-1-arnd@kernel.org
---
 drivers/irqchip/irq-armada-370-xp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index a555284..4b021a6 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -316,7 +316,7 @@ static int armada_370_xp_msi_init(struct device_node *node,
 	return 0;
 }
 #else
-static void armada_370_xp_msi_reenable_percpu(void) {}
+static __maybe_unused void armada_370_xp_msi_reenable_percpu(void) {}
 
 static inline int armada_370_xp_msi_init(struct device_node *node,
 					 phys_addr_t main_int_phys_base)