[PATCH 6.18 369/752] ARM: 9467/1: mm: Don't use %pK through printk

Sasha Levin
2026-02-28T17:53:17Z

From: Thomas Weissschuh <thomas.weissschuh@linutronix.de>

[ Upstream commit 012ea376a5948b025f260aa45d2a6ec5d96674ea ]

Restricted pointers ("%pK") were never meant to be used
through printk(). They can acquire sleeping locks in atomic contexts.

Switch to %px over the more secure %p as this usage is a debugging aid,
gated behind CONFIG_DEBUG_VIRTUAL and used by WARN().

Link: https://lore.kernel.org/lkml/20250113171731-dc10e3c1-da64-4af0-b767-7c7070468023@linutronix.de/
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/mm/physaddr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mm/physaddr.c b/arch/arm/mm/physaddr.c
index 3f263c840ebc4..1a37ebfacbba9 100644
--- a/arch/arm/mm/physaddr.c
+++ b/arch/arm/mm/physaddr.c
@@ -38,7 +38,7 @@ static inline bool __virt_addr_valid(unsigned long x)
phys_addr_t __virt_to_phys(unsigned long x)
{
WARN(!__virt_addr_valid(x),
- "virt_to_phys used for non-linear address: %pK (%pS)\n",
+ "virt_to_phys used for non-linear address: %px (%pS)\n",
(void *)x, (void *)x);

return __virt_to_phys_nodebug(x);
--
2.51.0