From 2c4ce3e65b1a543123ffcec4b021ad6ebd4e4e4e Mon Sep 17 00:00:00 2001 From: Benjamin Gray Date: Wed, 11 Oct 2023 16:37:09 +1100 Subject: [PATCH] powerpc: Cast away __iomem in low level IO routines Sparse reports dereferencing an __iomem pointer. These routines are clearly low level handlers for IO memory, so force cast away the __iomem annotation to tell sparse the dereferences are safe. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://msgid.link/20231011053711.93427-11-bgray@linux.ibm.com --- arch/powerpc/kernel/io.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/io.c b/arch/powerpc/kernel/io.c index 2f29b7d432de..6af535905984 100644 --- a/arch/powerpc/kernel/io.c +++ b/arch/powerpc/kernel/io.c @@ -33,7 +33,7 @@ void _insb(const volatile u8 __iomem *port, void *buf, long count) return; asm volatile("sync"); do { - tmp = *port; + tmp = *(const volatile u8 __force *)port; eieio(); *tbuf++ = tmp; } while (--count != 0); @@ -49,7 +49,7 @@ void _outsb(volatile u8 __iomem *port, const void *buf, long count) return; asm volatile("sync"); do { - *port = *tbuf++; + *(volatile u8 __force *)port = *tbuf++; } while (--count != 0); asm volatile("sync"); } @@ -64,7 +64,7 @@ void _insw_ns(const volatile u16 __iomem *port, void *buf, long count) return; asm volatile("sync"); do { - tmp = *port; + tmp = *(const volatile u16 __force *)port; eieio(); *tbuf++ = tmp; } while (--count != 0); @@ -80,7 +80,7 @@ void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count) return; asm volatile("sync"); do { - *port = *tbuf++; + *(volatile u16 __force *)port = *tbuf++; } while (--count != 0); asm volatile("sync"); } @@ -95,7 +95,7 @@ void _insl_ns(const volatile u32 __iomem *port, void *buf, long count) return; asm volatile("sync"); do { - tmp = *port; + tmp = *(const volatile u32 __force *)port; eieio(); *tbuf++ = tmp; } while (--count != 0); @@ -111,7 +111,7 @@ void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count) return; asm volatile("sync"); do { - *port = *tbuf++; + *(volatile u32 __force *)port = *tbuf++; } while (--count != 0); asm volatile("sync"); }