checkpatch: handle EXPORT_SYMBOL for DEVICE_ATTR and similar

Handly definitions similar to below.  The definition macro spits out a
symbol with a prefix.  Add matching of any identifier prefix:

    DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
            ata_scsi_lpm_show, ata_scsi_lpm_put);
    EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);

Signed-off-by: Andy Whitcroft <apw@canonical.com>
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 d5361e49abadc8012d3db3f1f1d7075639c5046f..8ab45b72b396c02bb171fbfe1e5ddf584184ad2b 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1822,8 +1822,17 @@ sub process {
                    !defined $suppress_export{$realline_next} &&
                    ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
                     $lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
+                       # Handle definitions which produce identifiers with
+                       # a prefix:
+                       #   XXX(foo);
+                       #   EXPORT_SYMBOL(something_foo);
                        my $name = $1;
-                       if ($stat !~ /(?:
+                       if ($stat =~ /^.([A-Z_]+)\s*\(\s*($Ident)/ &&
+                           $name =~ /^${Ident}_$2/) {
+#print "FOO C name<$name>\n";
+                               $suppress_export{$realline_next} = 1;
+
+                       } elsif ($stat !~ /(?:
                                \n.}\s*$|
                                ^.DEFINE_$Ident\(\Q$name\E\)|
                                ^.DECLARE_$Ident\(\Q$name\E\)|