[PATCH 11/14] docs: move other kAPI documents to core-api

[PATCH 11/14] docs: move other kAPI documents to core-api

[Mauro Carvalho Chehab]

There are a number of random documents that seem to be
describing some aspects of the core-api. Move them to such
directory, adding them at the core-api/index.rst file.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 Documentation/admin-guide/sysctl/vm.rst                     | 2 +-
 Documentation/core-api/index.rst                            | 6 ++++++
 Documentation/{mailbox.txt => core-api/mailbox.rst}         | 0
 Documentation/{nommu-mmap.txt => core-api/nommu-mmap.rst}   | 0
 .../{this_cpu_ops.txt => core-api/this_cpu_ops.rst}         | 0
 .../unaligned-memory-access.rst}                            | 0
 Documentation/gpu/drm-mm.rst                                | 2 +-
 arch/Kconfig                                                | 2 +-
 init/Kconfig                                                | 2 +-
 mm/Kconfig                                                  | 2 +-
 mm/nommu.c                                                  | 2 +-
 11 files changed, 12 insertions(+), 6 deletions(-)
 rename Documentation/{mailbox.txt => core-api/mailbox.rst} (100%)
 rename Documentation/{nommu-mmap.txt => core-api/nommu-mmap.rst} (100%)
 rename Documentation/{this_cpu_ops.txt => core-api/this_cpu_ops.rst} (100%)
 rename Documentation/{unaligned-memory-access.txt => core-api/unaligned-memory-access.rst} (100%)

diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst
index 0329a4d3fa9e..0bf2f2a84a9f 100644
--- a/Documentation/admin-guide/sysctl/vm.rst
+++ b/Documentation/admin-guide/sysctl/vm.rst
@@ -583,7 +583,7 @@ trimming of allocations is initiated.
 
 The default value is 1.
 
-See Documentation/nommu-mmap.txt for more information.
+See Documentation/core-api/nommu-mmap.rst for more information.
 
 
 numa_zonelist_order
diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst
index eeac63ba17c3..fe03a639a91a 100644
--- a/Documentation/core-api/index.rst
+++ b/Documentation/core-api/index.rst
@@ -38,10 +38,14 @@ Library functionality that is used throughout the kernel.
    circular-buffers
    rbtree
    generic-radix-tree
+   mailbox
    packing
+   rbtree
+   this_cpu_ops
    timekeeping
    errseq
 
+
 Concurrency primitives
 ======================
 
@@ -82,11 +86,13 @@ more memory-management documentation in :doc:`/vm/index`.
    :maxdepth: 1
 
    memory-allocation
+   unaligned-memory-access
    dma-api
    dma-api-howto
    dma-attributes
    dma-isa-lpc
    bus-virt-phys-mapping
+   nommu-mmap
    mm-api
    genalloc
    pin_user_pages
diff --git a/Documentation/mailbox.txt b/Documentation/core-api/mailbox.rst
similarity index 100%
rename from Documentation/mailbox.txt
rename to Documentation/core-api/mailbox.rst
diff --git a/Documentation/nommu-mmap.txt b/Documentation/core-api/nommu-mmap.rst
similarity index 100%
rename from Documentation/nommu-mmap.txt
rename to Documentation/core-api/nommu-mmap.rst
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/unaligned-memory-access.txt b/Documentation/core-api/unaligned-memory-access.rst
similarity index 100%
rename from Documentation/unaligned-memory-access.txt
rename to Documentation/core-api/unaligned-memory-access.rst
diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst
index 1839762044be..e0bbcbb6f512 100644
--- a/Documentation/gpu/drm-mm.rst
+++ b/Documentation/gpu/drm-mm.rst
@@ -314,7 +314,7 @@ To use drm_gem_cma_get_unmapped_area(), drivers must fill the struct
 a pointer on drm_gem_cma_get_unmapped_area().
 
 More detailed information about get_unmapped_area can be found in
-Documentation/nommu-mmap.txt
+Documentation/core-api/nommu-mmap.rst
 
 Memory Coherency
 ----------------
diff --git a/arch/Kconfig b/arch/Kconfig
index 786a85d4ad40..b0b4046c9d13 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
diff --git a/init/Kconfig b/init/Kconfig
index 492bb7000aa4..61ccfd9243e3 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1950,7 +1950,7 @@ config MMAP_ALLOW_UNINITIALIZED
 	  userspace.  Since that isn't generally a problem on no-MMU systems,
 	  it is normally safe to say Y here.
 
-	  See Documentation/nommu-mmap.txt for more information.
+	  See Documentation/core-api/nommu-mmap.rst for more information.
 
 config SYSTEM_DATA_VERIFICATION
 	def_bool n
diff --git a/mm/Kconfig b/mm/Kconfig
index db626b8d4fdb..2a133c40a4b7 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -382,7 +382,7 @@ config NOMMU_INITIAL_TRIM_EXCESS
 	  This option specifies the initial value of this option.  The default
 	  of 1 says that all excess pages should be trimmed.
 
-	  See Documentation/nommu-mmap.txt for more information.
+	  See Documentation/core-api/nommu-mmap.rst for more information.
 
 config TRANSPARENT_HUGEPAGE
 	bool "Transparent Hugepage Support"
diff --git a/mm/nommu.c b/mm/nommu.c
index 371697bf372d..e3e707d6f124 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -5,7 +5,7 @@
  *  Replacement code for mm functions to support CPU's that don't
  *  have any form of memory management unit (thus no virtual memory).
  *
- *  See Documentation/nommu-mmap.txt
+ *  See Documentation/core-api/nommu-mmap.rst
  *
  *  Copyright (c) 2004-2008 David Howells <dhowells@redhat.com>
  *  Copyright (c) 2000-2003 David McCullough <davidm@snapgear.com>
-- 
2.25.4

Re: [PATCH 11/14] docs: move other kAPI documents to core-api

[Mike Rapoport]

Hello Mauro,

On Fri, May 01, 2020 at 05:37:55PM +0200, Mauro Carvalho Chehab wrote:
> There are a number of random documents that seem to be
> describing some aspects of the core-api. Move them to such
> directory, adding them at the core-api/index.rst file.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  Documentation/admin-guide/sysctl/vm.rst                     | 2 +-
>  Documentation/core-api/index.rst                            | 6 ++++++
>  Documentation/{mailbox.txt => core-api/mailbox.rst}         | 0
>  Documentation/{nommu-mmap.txt => core-api/nommu-mmap.rst}   | 0

The nommu-mmap mostly provides description of user visible behaviuour. I
think it's bettter to have it in admin-guide/mm/.

>  .../{this_cpu_ops.txt => core-api/this_cpu_ops.rst}         | 0
>  .../unaligned-memory-access.rst}                            | 0
>  Documentation/gpu/drm-mm.rst                                | 2 +-
>  arch/Kconfig                                                | 2 +-
>  init/Kconfig                                                | 2 +-
>  mm/Kconfig                                                  | 2 +-
>  mm/nommu.c                                                  | 2 +-
>  11 files changed, 12 insertions(+), 6 deletions(-)
>  rename Documentation/{mailbox.txt => core-api/mailbox.rst} (100%)
>  rename Documentation/{nommu-mmap.txt => core-api/nommu-mmap.rst} (100%)
>  rename Documentation/{this_cpu_ops.txt => core-api/this_cpu_ops.rst} (100%)
>  rename Documentation/{unaligned-memory-access.txt => core-api/unaligned-memory-access.rst} (100%)
> 
> diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst
> index 0329a4d3fa9e..0bf2f2a84a9f 100644
> --- a/Documentation/admin-guide/sysctl/vm.rst
> +++ b/Documentation/admin-guide/sysctl/vm.rst
> @@ -583,7 +583,7 @@ trimming of allocations is initiated.
>  
>  The default value is 1.
>  
> -See Documentation/nommu-mmap.txt for more information.
> +See Documentation/core-api/nommu-mmap.rst for more information.
>  
>  
>  numa_zonelist_order
> diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst
> index eeac63ba17c3..fe03a639a91a 100644
> --- a/Documentation/core-api/index.rst
> +++ b/Documentation/core-api/index.rst
> @@ -38,10 +38,14 @@ Library functionality that is used throughout the kernel.
>     circular-buffers
>     rbtree
>     generic-radix-tree
> +   mailbox
>     packing
> +   rbtree
> +   this_cpu_ops
>     timekeeping
>     errseq
>  
> +
>  Concurrency primitives
>  ======================
>  
> @@ -82,11 +86,13 @@ more memory-management documentation in :doc:`/vm/index`.
>     :maxdepth: 1
>  
>     memory-allocation
> +   unaligned-memory-access
>     dma-api
>     dma-api-howto
>     dma-attributes
>     dma-isa-lpc
>     bus-virt-phys-mapping
> +   nommu-mmap
>     mm-api
>     genalloc
>     pin_user_pages
> diff --git a/Documentation/mailbox.txt b/Documentation/core-api/mailbox.rst
> similarity index 100%
> rename from Documentation/mailbox.txt
> rename to Documentation/core-api/mailbox.rst
> diff --git a/Documentation/nommu-mmap.txt b/Documentation/core-api/nommu-mmap.rst
> similarity index 100%
> rename from Documentation/nommu-mmap.txt
> rename to Documentation/core-api/nommu-mmap.rst
> 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/unaligned-memory-access.txt b/Documentation/core-api/unaligned-memory-access.rst
> similarity index 100%
> rename from Documentation/unaligned-memory-access.txt
> rename to Documentation/core-api/unaligned-memory-access.rst
> diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst
> index 1839762044be..e0bbcbb6f512 100644
> --- a/Documentation/gpu/drm-mm.rst
> +++ b/Documentation/gpu/drm-mm.rst
> @@ -314,7 +314,7 @@ To use drm_gem_cma_get_unmapped_area(), drivers must fill the struct
>  a pointer on drm_gem_cma_get_unmapped_area().
>  
>  More detailed information about get_unmapped_area can be found in
> -Documentation/nommu-mmap.txt
> +Documentation/core-api/nommu-mmap.rst
>  
>  Memory Coherency
>  ----------------
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 786a85d4ad40..b0b4046c9d13 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
> diff --git a/init/Kconfig b/init/Kconfig
> index 492bb7000aa4..61ccfd9243e3 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -1950,7 +1950,7 @@ config MMAP_ALLOW_UNINITIALIZED
>  	  userspace.  Since that isn't generally a problem on no-MMU systems,
>  	  it is normally safe to say Y here.
>  
> -	  See Documentation/nommu-mmap.txt for more information.
> +	  See Documentation/core-api/nommu-mmap.rst for more information.
>  
>  config SYSTEM_DATA_VERIFICATION
>  	def_bool n
> diff --git a/mm/Kconfig b/mm/Kconfig
> index db626b8d4fdb..2a133c40a4b7 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -382,7 +382,7 @@ config NOMMU_INITIAL_TRIM_EXCESS
>  	  This option specifies the initial value of this option.  The default
>  	  of 1 says that all excess pages should be trimmed.
>  
> -	  See Documentation/nommu-mmap.txt for more information.
> +	  See Documentation/core-api/nommu-mmap.rst for more information.
>  
>  config TRANSPARENT_HUGEPAGE
>  	bool "Transparent Hugepage Support"
> diff --git a/mm/nommu.c b/mm/nommu.c
> index 371697bf372d..e3e707d6f124 100644
> --- a/mm/nommu.c
> +++ b/mm/nommu.c
> @@ -5,7 +5,7 @@
>   *  Replacement code for mm functions to support CPU's that don't
>   *  have any form of memory management unit (thus no virtual memory).
>   *
> - *  See Documentation/nommu-mmap.txt
> + *  See Documentation/core-api/nommu-mmap.rst
>   *
>   *  Copyright (c) 2004-2008 David Howells <dhowells@redhat.com>
>   *  Copyright (c) 2000-2003 David McCullough <davidm@snapgear.com>
> -- 
> 2.25.4
> 

-- 
Sincerely yours,
Mike.

Re: [PATCH 11/14] docs: move other kAPI documents to core-api

[Jonathan Corbet]

On Fri,  1 May 2020 17:37:55 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> There are a number of random documents that seem to be
> describing some aspects of the core-api. Move them to such
> directory, adding them at the core-api/index.rst file.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  Documentation/admin-guide/sysctl/vm.rst                     | 2 +-
>  Documentation/core-api/index.rst                            | 6 ++++++
>  Documentation/{mailbox.txt => core-api/mailbox.rst}         | 0
>  Documentation/{nommu-mmap.txt => core-api/nommu-mmap.rst}   | 0
>  .../{this_cpu_ops.txt => core-api/this_cpu_ops.rst}         | 0
>  .../unaligned-memory-access.rst}                            | 0
>  Documentation/gpu/drm-mm.rst                                | 2 +-
>  arch/Kconfig                                                | 2 +-
>  init/Kconfig                                                | 2 +-
>  mm/Kconfig                                                  | 2 +-
>  mm/nommu.c                                                  | 2 +-
>  11 files changed, 12 insertions(+), 6 deletions(-)
>  rename Documentation/{mailbox.txt => core-api/mailbox.rst} (100%)
>  rename Documentation/{nommu-mmap.txt => core-api/nommu-mmap.rst} (100%)
>  rename Documentation/{this_cpu_ops.txt => core-api/this_cpu_ops.rst} (100%)
>  rename Documentation/{unaligned-memory-access.txt => core-api/unaligned-memory-access.rst} (100%)

This one doesn't apply for me.  Beyond that, I'm not entirely convinced
about a couple of the moves...

 - mailbox.txt seems like driver-api stuff to me?
 - nommu-mmap.txt is mostly (though not completely) about the semantic of
   mmap() options as seen by user space, so perhaps belongs in that
   manual...?

Thanks,

jon