Re: [PATCH] checkpatch: Check for quoted strings broken acrosslines

From: Jesper Juhl
Date: Thu Feb 02 2012 - 16:29:23 EST

On Thu, 2 Feb 2012, Nick Bowler wrote:

> On 2012-02-02 12:06 -0800, Josh Triplett wrote:
> > Documentation/CodingStyle recommends not splitting quoted strings across
> > lines, because it breaks the ability to grep for the string. checkpatch
> > already makes an exception to the 80-column rule for quoted strings to
> > allow this. Rather than just allowing it, actively warn about quoted
> > strings split across lines.
> [...]
> > +# Check for strings broken across lines (breaks greppability). Make an

s/greppability/grepability/ ?

> > +# exception when the previous string ends in a newline (multiple lines in one
> > +# string constant) or \n\t (common in inline assembly to indent the instruction
> > +# on the following line).
> There are tons of strings in the kernel that this makes checkpatch warn
> about where it probably shouldn't. For example, this one (from
> kernel/auditsc.c:1476):
> audit_log_format(ab,
> "oflag=0x%x mode=%#ho mq_flags=0x%lx mq_maxmsg=%ld "
> "mq_msgsize=%ld mq_curmsgs=%ld",
> WARNING: quoted string split across lines
> #1478: FILE: auditsc.c:1478:
> + "mq_msgsize=%ld mq_curmsgs=%ld",
> Breaking "greppability" of this string is a non-issue, because this sort
> of string is not really greppable to begin with (and would certainly not
> be any easier to grep for if it were all on one line).

Agreed. checkpatch needs to not warn about strings like this.
But generally a good idea to warn about "easily grepable strings broken
into multiple lines" if possible, IMHO...

Jesper Juhl <jj@xxxxxxxxxxxxx>
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