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Tamir Duberstein
3735c5225b
Avoid string concatenation with an undefined variable when a reference to a missing commit is contained in a `Fixes` tag. Given this patch: : From: Tamir Duberstein <tamird@gmail.com> : Subject: Test patch : Date: Fri, 25 Oct 2024 19:30:51 -0400 : : This is a test patch. : : Fixes: deadbeef111 : Signed-off-by: Tamir Duberstein <tamird@gmail.com> : --- /dev/null : +++ b/new-file : @@ -0,0 +1 @@ : +Test. Before: WARNING: Please use correct Fixes: style 'Fixes: <12 chars of sha1> ("<title line>")' - ie: 'Fixes: ("commit title")' WARNING: Unknown commit id 'deadbeef111', maybe rebased or not pulled? Use of uninitialized value $cid in concatenation (.) or string at scripts/checkpatch.pl line 3242. After: WARNING: Unknown commit id 'deadbeef111', maybe rebased or not pulled? This patch also reduce duplication slightly. [akpm@linux-foundation.org: s/12 chars of sha1/12+ chars of sha1/, per Jon] Link: https://lkml.kernel.org/r/87o70kt232.fsf@trenco.lwn.net Link: https://lkml.kernel.org/r/20241204-checkpatch-missing-commit-v1-1-68b34c94944e@gmail.com Signed-off-by: Tamir Duberstein <tamird@gmail.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Dwaipayan Ray <dwaipayanray1@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.