X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=arch%2FKconfig;h=a08999dfcf1620f362f9c6dbb222beed1c7b456b;hb=d73b49365ee65ac48074bdb5aa717bb4644dbbb7;hp=d4bdc19ed3ad9a64023f1d1f4f7b1bb16472df8e;hpb=92dbc9dedccb9759c7f9f2f0ae6242396376988f;p=linux-2.6-microblaze.git

diff --git a/arch/Kconfig b/arch/Kconfig
index d4bdc19ed3ad..a08999dfcf16 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -143,6 +143,22 @@ config UPROBES
 	    managed by the kernel and kept transparent to the probed
 	    application. )
 
+config HAVE_64BIT_ALIGNED_ACCESS
+	def_bool 64BIT && !HAVE_EFFICIENT_UNALIGNED_ACCESS
+	help
+	  Some architectures require 64 bit accesses to be 64 bit
+	  aligned, which also requires structs containing 64 bit values
+	  to be 64 bit aligned too. This includes some 32 bit
+	  architectures which can do 64 bit accesses, as well as 64 bit
+	  architectures without unaligned access.
+
+	  This symbol should be selected by an architecture if 64 bit
+	  accesses are required to be 64 bit aligned in this way even
+	  though it is not a 64 bit architecture.
+
+	  See Documentation/unaligned-memory-access.txt for more
+	  information on the topic of unaligned memory accesses.
+
 config HAVE_EFFICIENT_UNALIGNED_ACCESS
 	bool
 	help