Port 0x80 is not safe to use on all x86 boards (see
arch/x86/kernel/io_delay.c), so optionally use 0xed from the kernel
config instead.
Signed-off-by: Simon Kagstrom <simon.kagstrom@xxxxxxxxxxxxxx>
---
arch/x86/boot/boot.h | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index 98239d2..79880b1 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -73,7 +73,12 @@ static inline u32 inl(u32 port)
static inline void io_delay(void)
{
+#ifdef CONFIG_IO_DELAY_0XED
+ const u16 DELAY_PORT = 0xed;
+#else
const u16 DELAY_PORT = 0x80;
+#endif
+
asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT));
}
--
1.6.0.4
--
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