diff --git a/Documentation/bus-virt-phys-mapping.txt b/Documentation/core-api/bus-virt-phys-mapping.rst
similarity index 100%
rename from Documentation/bus-virt-phys-mapping.txt
rename to Documentation/core-api/bus-virt-phys-mapping.rst
diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst
index 15ab8611262720da67254faf431a4b8ce1b3366a..69171b1799f21464322ff150a41e3b39e4978b2b 100644
--- a/Documentation/core-api/index.rst
+++ b/Documentation/core-api/index.rst
@@ -39,6 +39,8 @@ Library functionality that is used throughout the kernel.
    rbtree
    generic-radix-tree
    packing
+   bus-virt-phys-mapping
+   this_cpu_ops
    timekeeping
    errseq
 
@@ -82,6 +84,7 @@ more memory-management documentation in :doc:`/vm/index`.
    :maxdepth: 1
 
    memory-allocation
+   unaligned-memory-access
    dma-api
    dma-api-howto
    dma-attributes
diff --git a/Documentation/this_cpu_ops.txt b/Documentation/core-api/this_cpu_ops.rst
similarity index 100%
rename from Documentation/this_cpu_ops.txt
rename to Documentation/core-api/this_cpu_ops.rst
diff --git a/Documentation/process/unaligned-memory-access.rst b/Documentation/core-api/unaligned-memory-access.rst
similarity index 100%
rename from Documentation/process/unaligned-memory-access.rst
rename to Documentation/core-api/unaligned-memory-access.rst
diff --git a/arch/Kconfig b/arch/Kconfig
index 8cc35dc556c72e9cfba7d92dce292d9897f36a12..2a439fb8069e30e78a3456d2dff40d5481ea8c74 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -147,7 +147,7 @@ config HAVE_EFFICIENT_UNALIGNED_ACCESS
 	  problems with received packets if doing so would not help
 	  much.
 
-	  See Documentation/unaligned-memory-access.txt for more
+	  See Documentation/core-api/unaligned-memory-access.rst for more
 	  information on the topic of unaligned memory accesses.
 
 config ARCH_USE_BUILTIN_BSWAP