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Subject[PATCH] powerpc: Make unaligned accesses endian-safe for powerpc
From: Rajesh B Prathipati <>

The generic put_unaligned/get_unaligned macros were made endian-safe by
calling the appropriate endian dependent macros based on the endian type
of the powerpc processor.

Signed-off-by: Rajesh B Prathipati <>
This patch applies to linux kernel version 3.12. This patch has been
tested and it fixes the problem with linux 3.12 USB stack.

--- linux/arch/powerpc/include/asm/unaligned.h.orig 2013-12-12
00:07:05.329073544 -0200
+++ linux/arch/powerpc/include/asm/unaligned.h 2013-12-11
23:56:52.918630238 -0200
@@ -4,13 +4,18 @@
#ifdef __KERNEL__

- * The PowerPC can do unaligned accesses itself in big endian mode.
+ * The PowerPC can do unaligned accesses itself based on its endian mode.
#include <linux/unaligned/access_ok.h>
#include <linux/unaligned/generic.h>

+#ifdef __LITTLE_ENDIAN__
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
#define get_unaligned __get_unaligned_be
#define put_unaligned __put_unaligned_be

#endif /* __KERNEL__ */

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