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Full Discussion: Use of goto keyword in kernel programming
Operating Systems Linux Ubuntu Use of goto keyword in kernel programming Post 302967974 by BHASKAR JUPUDI on Tuesday 1st of March 2016 10:36:42 PM
Old 03-01-2016
Use of goto keyword in kernel programming
I have found many source files in the kernel using goto keyword instead of just doing the actual thing. For example:

Code:
if(blah)
goto x;
--
--
--
--
--

x: return blah-blah

Is there any specific reason for writing the code like this? The first thought that came to my mind is minimizing code duplication. If we are going to change the
Code:
return (blah-blah)

then with the use of goto we have to change only one instance of it. I'm asking this because if we consider the above situation, if we replace
Code:
goto x

with
Code:
return blah-blah

(to avoid the overhead of calling goto) then will that be a patch?
 

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LEARN ABOUT LINUX

what-patch

WHAT-PATCH(1)                                                 General Commands Manual                                                WHAT-PATCH(1)

NAME

       what-patch - detect which patch system a Debian package uses

SYNOPSIS

       what-patch [options]

DESCRIPTION

       what-patch examines the debian/rules file to determine which patch system the Debian package is using.

       what-patch should be run from the root directory of the Debian source package.

OPTIONS

       Listed below are the command line options for what-patch:

       -h, --help
              Display a help message and exit.

       -v     Enable verbose mode.  This will include the listing of any files modified outside or the debian/ directory and report any additional
              details about the patch system if available.

AUTHORS

       what-patch was written by Kees Cook <kees@ubuntu.com>, Siegfried-A. Gevatter <rainct@ubuntu.com>, and  Daniel  Hahler  <ubuntu@thequod.de>,
       among others.  This manual page was written by Jonathan Patrick Davies <jpds@ubuntu.com>.

       Both are released under the GNU General Public License, version 3 or later.

SEE ALSO

       The Ubuntu MOTU team has some documentation about patch systems at the Ubuntu wiki: https://wiki.ubuntu.com/PackagingGuide/PatchSystems

       cdbs-edit-patch(1), dbs-edit-patch(1), dpatch-edit-patch(1)

DEBIAN                                                           Debian Utilities                                                    WHAT-PATCH(1)
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