linux-kernel - [PATCH V2] checkpatch: Prefer __section over __attribute_

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Date:   Mon, 12 Aug 2019 13:45:39 -0700
From:   Joe Perches <joe@...ches.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH V2] checkpatch: Prefer __section over
 __attribute__((section(...)))

Add another test for __attribute__((section("foo"))) uses
that should be __section(foo)

Suggested-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Joe Perches <joe@...ches.com>
Tested-by: Nick Desaulniers <ndesaulniers@...gle.com>
---

V2: Remove (however dull) humor
    Fix fix missing ) removal

 scripts/checkpatch.pl | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 1cdacb4fd207..d4153b81b1eb 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5901,6 +5901,18 @@ sub process {
 			     "__aligned(size) is preferred over __attribute__((aligned(size)))\n" . $herecurr);
 		}
 
+# Check for __attribute__ section, prefer __section
+		if ($realfile !~ m@\binclude/uapi/@ &&
+		    $line =~ /\b__attribute__\s*\(\s*\(.*_*section_*\s*\(\s*("[^"]*")/) {
+			my $old = substr($rawline, $-[1], $+[1] - $-[1]);
+			my $new = substr($old, 1, -1);
+			if (WARN("PREFER_SECTION",
+				 "__section($new) is preferred over __attribute__((section($old)))\n" . $herecurr) &&
+			    $fix) {
+				$fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*_*section_*\s*\(\s*\Q$old\E\s*\)\s*\)\s*\)/__section($new)/;
+			}
+		}
+
 # Check for __attribute__ format(printf, prefer __printf
 		if ($realfile !~ m@\binclude/uapi/@ &&
 		    $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf/) {