checkpatch: don't warn about colon termination in linker scripts

This check erroneously flags cases like the one in my recent printk
enumeration patch[0], where the spaces are syntactic, and `section:' vs.
`section :' is syntactically important:

    ERROR: space prohibited before that ':' (ctx:WxW)
    #258: FILE: include/asm-generic/vmlinux.lds.h:314:
    +       .printk_fmts : AT(ADDR(.printk_fmts) - LOAD_OFFSET) {

0: https://lore.kernel.org/patchwork/patch/1375749/

Link: https://lkml.kernel.org/r/YBwhqsc2TIVeid3t@chrisdown.name
Link: https://lkml.kernel.org/r/YB6UsjCOy1qrrlSD@chrisdown.name
Signed-off-by: Chris Down <chris@chrisdown.name>
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>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3cdc070..75c9331 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5044,7 +5044,7 @@ sub process {
                                # A colon needs no spaces before when it is
                                # terminating a case value or a label.
                                } elsif ($opv eq ':C' || $opv eq ':L') {
-                                       if ($ctx =~ /Wx./) {
+                                       if ($ctx =~ /Wx./ and $realfile !~ m@.*\.lds\.h$@) {
                                                if (ERROR("SPACING",
                                                          "space prohibited before that '$op' $at\n" . $hereptr)) {
                                                        $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);