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sysfs-rules.txt: reword API stability statement

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The first paragraph of this document implies that user space developers
shouldn't use sysfs at all, but then it goes on to describe rules that
developers should follow when accessing sysfs.  Not only is this somewhat
self-contradictory, it has been shown to discourage developers from using
established sysfs interfaces.

A note of caution is more appropriate than a blanket "sysfs will never
be stable" assertion.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Nathan Lynch 2008-07-02 10:21:30 -07:00 committed by Greg Kroah-Hartman
parent 9505e63756
commit 83c79b55f0
1 changed files with 2 additions and 3 deletions
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Documentation/sysfs-rules.txt
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@ -3,9 +3,8 @@ Rules on how to access information in the Linux kernel sysfs
The kernel-exported sysfs exports internal kernel implementation details
and depends on internal kernel structures and layout. It is agreed upon
by the kernel developers that the Linux kernel does not provide a stable
internal API. As sysfs is a direct export of kernel internal
structures, the sysfs interface cannot provide a stable interface either;
it may always change along with internal kernel changes.
internal API. Therefore, there are aspects of the sysfs interface that
may not be stable across kernel releases.
To minimize the risk of breaking users of sysfs, which are in most cases
low-level userspace applications, with a new kernel release, the users