The patch titled
Subject: checkpatch: add --strict "pointer comparison to NULL" test
has been removed from the -mm tree. Its filename was
checkpatch-add-strict-pointer-comparison-to-null-test.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Joe Perches <joe@xxxxxxxxxxx>
Subject: checkpatch: add --strict "pointer comparison to NULL" test
It seems there are more and more uses of "if (!ptr)" in preference to "if
(ptr == NULL)" so add a --strict test to emit a message when using the
latter form.
This also finds (ptr != NULL).
Fix it too if desired.
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/checkpatch.pl | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff -puN scripts/checkpatch.pl~checkpatch-add-strict-pointer-comparison-to-null-test scripts/checkpatch.pl
--- a/scripts/checkpatch.pl~checkpatch-add-strict-pointer-comparison-to-null-test
+++ a/scripts/checkpatch.pl
@@ -4522,6 +4522,20 @@ sub process {
"Possible precedence defect with mask then right shift - may need parentheses\n" . $herecurr);
}
+# check for pointer comparisons to NULL
+ if ($^V && $^V ge 5.10.0) {
+ while ($line =~ /\b$LvalOrFunc\s*(==|\!=)\s*NULL\b/g) {
+ my $val = $1;
+ my $equal = "!";
+ $equal = "" if ($4 eq "!=");
+ if (CHK("COMPARISON_TO_NULL",
+ "Comparison to NULL could be written \"${equal}${val}\"\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\b\Q$val\E\s*(?:==|\!=)\s*NULL\b/$equal$val/;
+ }
+ }
+ }
+
# check for bad placement of section $InitAttribute (e.g.: __initdata)
if ($line =~ /(\b$InitAttribute\b)/) {
my $attr = $1;
_
Patches currently in -mm which might be from joe@xxxxxxxxxxx are
origin.patch
mm-utilc-add-kstrimdup.patch
fs-affs-amigaffsc-use-va_format-instead-of-buffer-vnsprintf.patch
linux-next.patch
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