linux-kernel - [PATCH] powerpc: ps3: mark ps3_notification

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Message-Id: <20240320180333.151043-1-arnd@kernel.org>
Date: Wed, 20 Mar 2024 19:03:21 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Geoff Levand <geoff@...radead.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nathan Chancellor <nathan@...nel.org>,
	Paul Mackerras <paulus@...abs.org>,
	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Nicholas Piggin <npiggin@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	"Aneesh Kumar K.V" <aneesh.kumar@...nel.org>,
	"Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	Kevin Hao <haokexin@...il.com>,
	linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: [PATCH] powerpc: ps3: mark ps3_notification_device static for stack usage

From: Arnd Bergmann <arnd@...db.de>

The device is way too large to be on the stack, causing a warning for
an allmodconfig build with clang:

arch/powerpc/platforms/ps3/device-init.c:771:12: error: stack frame size (2064) exceeds limit (2048) in 'ps3_probe_thread' [-Werror,-Wframe-larger-than]
  771 | static int ps3_probe_thread(void *data)

There is only a single thread that ever accesses this, so it's fine to
make it static, which avoids the warning.

Fixes: b4cb2941f855 ("[POWERPC] PS3: Use the HVs storage device notification mechanism properly")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/powerpc/platforms/ps3/device-init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c
index 878bc160246e..ce99f06698a9 100644
--- a/arch/powerpc/platforms/ps3/device-init.c
+++ b/arch/powerpc/platforms/ps3/device-init.c
@@ -770,7 +770,7 @@ static struct task_struct *probe_task;
 
 static int ps3_probe_thread(void *data)
 {
-	struct ps3_notification_device dev;
+	static struct ps3_notification_device dev;
 	int res;
 	unsigned int irq;
 	u64 lpar;
-- 
2.39.2