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checkpatch: allow --fix removal of unnecessary break statements 

switch/case use of break after a return, goto or break is unnecessary.

There is an existing warning for the return and goto uses, so add
break and a --fix option too.

Link: https://lkml.kernel.org/r/d9ea654104d55f590fb97d252d64a66b23c1a096.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Julia Lawall <julia.lawall@inria.fr>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2020-12-15 20:44:33 -08:00 committed by Linus Torvalds
parent 73169765e6
commit dc58bc553e
1 changed files with 8 additions and 4 deletions
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12
scripts/checkpatch.pl
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@ -3699,12 +3699,16 @@ sub process {
}
# check indentation of a line with a break;
# if the previous line is a goto or return and is indented the same # of tabs
# if the previous line is a goto, return or break
# and is indented the same # of tabs
if ($sline =~ /^\+([\t]+)break\s*;\s*$/) {
my $tabs = $1;
if ($prevline =~ /^\+$tabs(?:goto|return)\b/) {
WARN("UNNECESSARY_BREAK",
"break is not useful after a goto or return\n" . $hereprev);
if ($prevline =~ /^\+$tabs(goto|return|break)\b/) {
if (WARN("UNNECESSARY_BREAK",
"break is not useful after a $1\n" . $hereprev) &&
$fix) {
fix_delete_line($fixlinenr, $rawline);
}
}
}