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-rwxr-xr-xscripts/checkpatch.pl59
1 files changed, 59 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 82fd120df0c2..19e8e862c1b9 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2811,6 +2811,65 @@ sub process {
}
}
+# Function pointer declarations
+# check spacing between type, funcptr, and args
+# canonical declaration is "type (*funcptr)(args...)"
+#
+# the $Declare variable will capture all spaces after the type
+# so check it for trailing missing spaces or multiple spaces
+ if ($line =~ /^.\s*($Declare)\((\s*)\*(\s*)$Ident(\s*)\)(\s*)\(/) {
+ my $declare = $1;
+ my $pre_pointer_space = $2;
+ my $post_pointer_space = $3;
+ my $funcname = $4;
+ my $post_funcname_space = $5;
+ my $pre_args_space = $6;
+
+ if ($declare !~ /\s$/) {
+ WARN("SPACING",
+ "missing space after return type\n" . $herecurr);
+ }
+
+# unnecessary space "type (*funcptr)(args...)"
+ elsif ($declare =~ /\s{2,}$/) {
+ WARN("SPACING",
+ "Multiple spaces after return type\n" . $herecurr);
+ }
+
+# unnecessary space "type ( *funcptr)(args...)"
+ if (defined $pre_pointer_space &&
+ $pre_pointer_space =~ /^\s/) {
+ WARN("SPACING",
+ "Unnecessary space after function pointer open parenthesis\n" . $herecurr);
+ }
+
+# unnecessary space "type (* funcptr)(args...)"
+ if (defined $post_pointer_space &&
+ $post_pointer_space =~ /^\s/) {
+ WARN("SPACING",
+ "Unnecessary space before function pointer name\n" . $herecurr);
+ }
+
+# unnecessary space "type (*funcptr )(args...)"
+ if (defined $post_funcname_space &&
+ $post_funcname_space =~ /^\s/) {
+ WARN("SPACING",
+ "Unnecessary space after function pointer name\n" . $herecurr);
+ }
+
+# unnecessary space "type (*funcptr) (args...)"
+ if (defined $pre_args_space &&
+ $pre_args_space =~ /^\s/) {
+ WARN("SPACING",
+ "Unnecessary space before function pointer arguments\n" . $herecurr);
+ }
+
+ if (show_type("SPACING") && $fix) {
+ $fixed[$linenr - 1] =~
+ s/^(.\s*$Declare)\(\s*\*\s*($Ident)\s*\)\s*\(/rtrim($1) . " " . "\(\*$2\)\("/ex;
+ }
+ }
+
# check for spacing round square brackets; allowed:
# 1. with a type on the left -- int [] a;
# 2. at the beginning of a line for slice initialisers -- [0...10] = 5,