checkpatch: add test for #defines of ARCH_HAS_<foo>

Add a test for these #defines

Additionally, moved string_find_replace sub as it screws up subsequent
formatting when placed inside another sub.

Signed-off-by: Joe Perches <joe@perches.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index fcc74fe..8489c35 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1514,6 +1514,14 @@ sub rtrim {
        return $string;
 }
 
+sub string_find_replace {
+       my ($string, $find, $replace) = @_;
+
+       $string =~ s/$find/$replace/g;
+
+       return $string;
+}
+
 sub tabify {
        my ($leading) = @_;
 
@@ -3733,14 +3741,6 @@ sub process {
                        }
                }
 
-sub string_find_replace {
-       my ($string, $find, $replace) = @_;
-
-       $string =~ s/$find/$replace/g;
-
-       return $string;
-}
-
 # check for bad placement of section $InitAttribute (e.g.: __initdata)
                if ($line =~ /(\b$InitAttribute\b)/) {
                        my $attr = $1;
@@ -4198,6 +4198,12 @@ sub string_find_replace {
                             "usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
                }
 
+# Use of __ARCH_HAS_<FOO> or ARCH_HAVE_<BAR> is wrong.
+               if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(?:HAS|HAVE)\w*)\b/) {
+                       ERROR("DEFINE_ARCH_HAS",
+                             "#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . $herecurr);
+               }
+
 # check for %L{u,d,i} in strings
                my $string;
                while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {