[PATCH 4/7] checkpatch: fix false errors due to macro concatenation

Andy Whitcroft
2009-10-16T18:40:10Z

The macro concatenation (##) sequence can cause false errors when checking
macro's. Checkpatch doesn't currently know about the operator.

For example this line,

+ entry = (struct ftrace_raw_##call *)raw_data; \

is correct but it produces the following error,

ERROR: need consistent spacing around '*' (ctx:WxB)
+ entry = (struct ftrace_raw_##call *)raw_data;\
^

The line above doesn't have any spacing problems, and if you remove the
macro concatenation sequence checkpatch doesn't give any errors.

Extend identifier handling to include ## concatenation within the
definition of an identifier.

Reported-by: Daniel Walker <dwalker@fifo99.com>
Signed-off-by: Andy Whitcroft <apw@canonical.com>
---
scripts/checkpatch.pl | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 05b10d6..cb2dac3 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -130,7 +130,10 @@ if ($tree) {

my $emitted_corrupt = 0;

-our $Ident = qr{[A-Za-z_][A-Za-z\d_]*};
+our $Ident = qr{
+ [A-Za-z_][A-Za-z\d_]*
+ (?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
+ }x;
our $Storage = qr{extern|static|asmlinkage};
our $Sparse = qr{
__user|
--
1.6.3.3