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Groups > linux.kernel > #1649971

[RFC PATCH 04/16] um: add dummy ioremap and iounmap functions

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The user mode architecture does not provide ioremap or iounmap, and
because of this, the arch won't build when the functions are used in some
core libraries.

I have designs to use these functions in scatterlist.c where they'd
almost certainly never be called on the um architecture but it does need
to compile.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Stephen Bates <sbates@raithlin.com>
---
 arch/um/include/asm/io.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 arch/um/include/asm/io.h

diff --git a/arch/um/include/asm/io.h b/arch/um/include/asm/io.h
new file mode 100644
index 0000000..8f35d57
--- /dev/null
+++ b/arch/um/include/asm/io.h
@@ -0,0 +1,17 @@
+#ifndef _ASM_UM_IO_H
+#define _ASM_UM_IO_H
+
+#define ioremap ioremap
+static inline void __iomem *ioremap(phys_addr_t offset, size_t size)
+{
+	return (void __iomem *)(unsigned long)offset;
+}
+
+#define iounmap iounmap
+static inline void iounmap(void __iomem *addr)
+{
+}
+
+#include <asm-generic/io.h>
+
+#endif
-- 
2.1.4

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[RFC PATCH 00/16] Unmappable memory in SGLs for p2p transfers Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200
  [RFC PATCH 04/16] um: add dummy ioremap and iounmap functions Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200
  [RFC PATCH 15/16] dma-mapping: introduce and use unmappable safe sg_virt call Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200
  [RFC PATCH 02/16] staging: ccree: Cleanup: remove references to page_link Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200
  [RFC PATCH 09/16] bvec: introduce bvec_page and bvec_set_page accessors Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200
  [RFC PATCH 16/16] nvmet: use unmappable sgl in rdma target Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200
  [RFC PATCH 11/16] bvec: convert to using pfn_t internally Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200
  [RFC PATCH 03/16] kfifo: Cleanup example to not use page_link Logan Gunthorpe <logang@deltatee.com> - 2017-05-24 23:50 +0200

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