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checkpatch: add fix option for ASSIGNMENT_CONTINUATIONS

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Currently, checkpatch warns us if an assignment operator is placed at the
start of a line and not at the end of previous line.

E.g., running checkpatch on commit 8195b1396ec8 ("hv_netvsc: fix
deadlock on hotplug") reports:

  CHECK: Assignment operator '=' should be on the previous line
  +	struct netvsc_device *nvdev
  +		= container_of(w, struct netvsc_device, subchan_work);

Provide a simple fix by appending assignment operator to the previous
line and removing from the current line, if both the lines are additions
(ie start with '+')

Link: https://lkml.kernel.org/r/20201121120407.22942-1-yashsri421@gmail.com
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aditya Srivastava 2020-12-15 20:45:06 -08:00 committed by Linus Torvalds
parent 03f4935135
commit da7355ab4e
1 changed files with 8 additions and 2 deletions
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10
scripts/checkpatch.pl
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@ -3533,8 +3533,14 @@ sub process {
# check for assignments on the start of a line
if ($sline =~ /^\+\s+($Assignment)[^=]/) {
CHK("ASSIGNMENT_CONTINUATIONS",
"Assignment operator '$1' should be on the previous line\n" . $hereprev);
my $operator = $1;
if (CHK("ASSIGNMENT_CONTINUATIONS",
"Assignment operator '$1' should be on the previous line\n" . $hereprev) &&
$fix && $prevrawline =~ /^\+/) {
# add assignment operator to the previous line, remove from current line
$fixed[$fixlinenr - 1] .= " $operator";
$fixed[$fixlinenr] =~ s/\Q$operator\E\s*//;
}
}
# check for && or || at the start of a line