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powerpc: Cast away __iomem in low level IO routines

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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 <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231011053711.93427-11-bgray@linux.ibm.com
This commit is contained in:
Benjamin Gray 2023-10-11 16:37:09 +11:00 committed by Michael Ellerman
parent c6519c6df0
commit 2c4ce3e65b
1 changed files with 6 additions and 6 deletions
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12
arch/powerpc/kernel/io.c
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@ -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");
}