Re: linux-next: build failure after merge of the asm-generic tree

From: Arnd Bergmann
Date: Fri Sep 26 2014 - 07:15:08 EST


On Friday 26 September 2014 11:53:33 Will Deacon wrote:
> > From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> > Date: Fri, 26 Sep 2014 19:57:03 +1000
> > Subject: [PATCH] sparc: io: fix for asm-generic: io: implement relaxed
> > accessor macros as conditional wrappers
> >
> > Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> > ---
> > arch/sparc/include/asm/io.h | 11 ++++++-----
> > 1 file changed, 6 insertions(+), 5 deletions(-)
> >
> > diff --git a/arch/sparc/include/asm/io.h b/arch/sparc/include/asm/io.h
> > index 493f22c4684f..79b167674010 100644
> > --- a/arch/sparc/include/asm/io.h
> > +++ b/arch/sparc/include/asm/io.h
> > @@ -1,10 +1,5 @@
> > #ifndef ___ASM_SPARC_IO_H
> > #define ___ASM_SPARC_IO_H
> > -#if defined(__sparc__) && defined(__arch64__)
> > -#include <asm/io_64.h>
> > -#else
> > -#include <asm/io_32.h>
> > -#endif
> >
> > /*
> > * Defines used for both SPARC32 and SPARC64
> > @@ -19,6 +14,12 @@
> > #define writew_relaxed(__w, __addr) writew(__w, __addr)
> > #define writel_relaxed(__l, __addr) writel(__l, __addr)
> >
> > +#if defined(__sparc__) && defined(__arch64__)
> > +#include <asm/io_64.h>
> > +#else
> > +#include <asm/io_32.h>
> > +#endif
> > +
>
> This patch looks fine to me. Arnd, can you pick this up please?
>

Thanks, applied on top with Stephen's full report in the commit
message and your Ack.

If David and Sam prefer, I could also do the patch below instead.
As sparc32 already uses the asm-generic header, it doesn't really
need the extra definitions, and they essentially become sparc64-only.

I've picked Stephen's version for now, since it's known to build
in the configurations he tests and has Will's Ack.

Arnd

diff --git a/arch/sparc/include/asm/io.h b/arch/sparc/include/asm/io.h
index 493f22c4684f..f6902cf3cbe9 100644
--- a/arch/sparc/include/asm/io.h
+++ b/arch/sparc/include/asm/io.h
@@ -10,15 +10,6 @@
* Defines used for both SPARC32 and SPARC64
*/

-/* Relaxed accessors for MMIO */
-#define readb_relaxed(__addr) readb(__addr)
-#define readw_relaxed(__addr) readw(__addr)
-#define readl_relaxed(__addr) readl(__addr)
-
-#define writeb_relaxed(__b, __addr) writeb(__b, __addr)
-#define writew_relaxed(__w, __addr) writew(__w, __addr)
-#define writel_relaxed(__l, __addr) writel(__l, __addr)
-
/* Big endian versions of memory read/write routines */
#define readb_be(__addr) __raw_readb(__addr)
#define readw_be(__addr) __raw_readw(__addr)
diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h
index d50e6127325d..e03df49e0dd8 100644
--- a/arch/sparc/include/asm/io_64.h
+++ b/arch/sparc/include/asm/io_64.h
@@ -412,6 +412,15 @@ static inline void iounmap(volatile void __iomem *addr)
#define iowrite32(val,X) writel(val,X)
#define iowrite32be(val,X) __raw_writel(val,X)

+/* Relaxed accessors for MMIO */
+#define readb_relaxed(__addr) readb(__addr)
+#define readw_relaxed(__addr) readw(__addr)
+#define readl_relaxed(__addr) readl(__addr)
+
+#define writeb_relaxed(__b, __addr) writeb(__b, __addr)
+#define writew_relaxed(__w, __addr) writew(__w, __addr)
+#define writel_relaxed(__l, __addr) writel(__l, __addr)
+
/* Create a virtual mapping cookie for an IO port range */
void __iomem *ioport_map(unsigned long port, unsigned int nr);
void ioport_unmap(void __iomem *);

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