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doc: split buffer.rst out of api-summary.rst

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Buffer heads are no longer a generic filesystem API but an optional
filesystem support library.  Make the documentation structure reflect
that, and include the fine documentation kept in buffer_head.h.  We could
give a better overview of what buffer heads are all about, but my
enthusiasm for documenting it is limited.

[willy@infradead.org: fix kerneldoc warning]
  Link: https://lkml.kernel.org/r/20240417015933.453505-1-willy@infradead.org
[akpm@linux-foundation.org: remove newline at EOF]
Link: https://lkml.kernel.org/r/20240416031754.4076917-9-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-04-16 04:17:52 +01:00 committed by Andrew Morton
parent 0b116ff4dc
commit 5ec5aab775
3 changed files with 13 additions and 3 deletions
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3
Documentation/filesystems/api-summary.rst
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@ -56,9 +56,6 @@ Other Functions
.. kernel-doc:: fs/namei.c
:export:
.. kernel-doc:: fs/buffer.c
:export:
.. kernel-doc:: block/bio.c
:export:

12
Documentation/filesystems/buffer.rst Normal file
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@ -0,0 +1,12 @@
Buffer Heads
============
Linux uses buffer heads to maintain state about individual filesystem blocks.
Buffer heads are deprecated and new filesystems should use iomap instead.
Functions
---------
.. kernel-doc:: include/linux/buffer_head.h
.. kernel-doc:: fs/buffer.c
:export:

1
Documentation/filesystems/index.rst
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@ -50,6 +50,7 @@ filesystem implementations.
.. toctree::
:maxdepth: 2
buffer
journalling
fscrypt
fsverity