[PATCH] powerpc: 52xx: Make immr_id DT match tables static

[PATCH] powerpc: 52xx: Make immr_id DT match tables static

[Rob Herring]

In some builds, the mpc52xx_pm_prepare()/lite5200_pm_prepare() functions
generate stack size warnings. The addition of 'struct resource' in commit
2500763dd3db ("powerpc: Use of_address_to_resource()") grew the stack size
and is blamed for the warnings. However, the real issue is there's no
reason the 'struct of_device_id immr_ids' DT match tables need to be on
the stack as they are constant. Declare them as static to move them off
the stack.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306130405.uTv5yOZD-lkp@intel.com/
Signed-off-by: Rob Herring <robh@kernel.org>
---
 arch/powerpc/platforms/52xx/lite5200_pm.c | 2 +-
 arch/powerpc/platforms/52xx/mpc52xx_pm.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/52xx/lite5200_pm.c b/arch/powerpc/platforms/52xx/lite5200_pm.c
index ee29b63fca16..4900f5f48cce 100644
--- a/arch/powerpc/platforms/52xx/lite5200_pm.c
+++ b/arch/powerpc/platforms/52xx/lite5200_pm.c
@@ -47,7 +47,7 @@ static int lite5200_pm_begin(suspend_state_t state)
 static int lite5200_pm_prepare(void)
 {
 	struct device_node *np;
-	const struct of_device_id immr_ids[] = {
+	static const struct of_device_id immr_ids[] = {
 		{ .compatible = "fsl,mpc5200-immr", },
 		{ .compatible = "fsl,mpc5200b-immr", },
 		{ .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pm.c b/arch/powerpc/platforms/52xx/mpc52xx_pm.c
index 549b3629e39a..f0c31ae15da5 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pm.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pm.c
@@ -60,7 +60,7 @@ int mpc52xx_set_wakeup_gpio(u8 pin, u8 level)
 int mpc52xx_pm_prepare(void)
 {
 	struct device_node *np;
-	const struct of_device_id immr_ids[] = {
+	static const struct of_device_id immr_ids[] = {
 		{ .compatible = "fsl,mpc5200-immr", },
 		{ .compatible = "fsl,mpc5200b-immr", },
 		{ .type = "soc", .compatible = "mpc5200", }, /* lite5200 */
-- 
2.39.2

Re: [PATCH] powerpc: 52xx: Make immr_id DT match tables static

[Michael Ellerman]

On Wed, 14 Jun 2023 11:17:23 -0600, Rob Herring wrote:
> In some builds, the mpc52xx_pm_prepare()/lite5200_pm_prepare() functions
> generate stack size warnings. The addition of 'struct resource' in commit
> 2500763dd3db ("powerpc: Use of_address_to_resource()") grew the stack size
> and is blamed for the warnings. However, the real issue is there's no
> reason the 'struct of_device_id immr_ids' DT match tables need to be on
> the stack as they are constant. Declare them as static to move them off
> the stack.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc: 52xx: Make immr_id DT match tables static
      https://git.kernel.org/powerpc/c/d65305bfa6f797712b928bd8f4781380726b70a0

cheers