From cc26ebbebde8548014d9329ac2f6cf0178181789 Mon Sep 17 00:00:00 2001
From: Tony Luck <tony.luck@intel.com>
Date: Mon, 20 Aug 2018 09:31:04 -0700
Subject: [PATCH] ia64: Fix kernel BUG at lib/ioremap.c:72!
Commit 0bbf47eab469 ("ia64: use asm-generic/io.h") results in a BUG
while booting ia64. This is because asm-generic/io.h defines
PCI_IOBASE, which results in the function acpi_pci_root_remap_iospace()
doing a lot of unnecessary (and wrong) things.
I'd suggested an #if !CONFIG_IA64 in the functon, but Arnd suggested
keeping the fix inside the arch/ia64 tree.
Fixes: 0bbf47eab469 ("ia64: use asm-generic/io.h")
Suggested-by: Arnd Bergman <arnd@arndb.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
arch/ia64/include/asm/io.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index 6f952171abf94..1e6fef69bb01c 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -454,6 +454,7 @@ extern void memset_io(volatile void __iomem *s, int c, long n);
#define xlate_dev_kmem_ptr xlate_dev_kmem_ptr
#define xlate_dev_mem_ptr xlate_dev_mem_ptr
#include <asm-generic/io.h>
+#undef PCI_IOBASE
# endif /* __KERNEL__ */
--
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