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checkpatch: don't warn on some function pointer return styles

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Checks for some function pointer return styles are too strict.  Fix
them.

Multiple spaces after function pointer return types are allowed.
	int  (*foo)(int bar)

Spaces after function pointer returns of pointer types are not required.
	int *(*foo)(int bar)

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2014-04-03 14:49:12 -07:00 committed by Linus Torvalds
parent 43c1d77c39
commit 91f72e9c6e
1 changed files with 21 additions and 10 deletions
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31
scripts/checkpatch.pl
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@ -2848,10 +2848,7 @@ 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*)\(/) {
if ($line =~ /^.\s*($Declare)\((\s*)\*(\s*)($Ident)(\s*)\)(\s*)\(/) {
my $declare = $1;
my $pre_pointer_space = $2;
my $post_pointer_space = $3;
@ -2859,16 +2856,30 @@ sub process {
my $post_funcname_space = $5;
my $pre_args_space = $6;
if ($declare !~ /\s$/) {
# the $Declare variable will capture all spaces after the type
# so check it for a missing trailing missing space but pointer return types
# don't need a space so don't warn for those.
my $post_declare_space = "";
if ($declare =~ /(\s+)$/) {
$post_declare_space = $1;
$declare = rtrim($declare);
}
if ($declare !~ /\*$/ && $post_declare_space =~ /^$/) {
WARN("SPACING",
"missing space after return type\n" . $herecurr);
$post_declare_space = " ";
}
# unnecessary space "type (*funcptr)(args...)"
elsif ($declare =~ /\s{2,}$/) {
WARN("SPACING",
"Multiple spaces after return type\n" . $herecurr);
}
# This test is not currently implemented because these declarations are
# equivalent to
# int foo(int bar, ...)
# and this is form shouldn't/doesn't generate a checkpatch warning.
#
# elsif ($declare =~ /\s{2,}$/) {
# WARN("SPACING",
# "Multiple spaces after return type\n" . $herecurr);
# }
# unnecessary space "type ( *funcptr)(args...)"
if (defined $pre_pointer_space &&
@ -2900,7 +2911,7 @@ sub process {
if (show_type("SPACING") && $fix) {
$fixed[$linenr - 1] =~
s/^(.\s*$Declare)\(\s*\*\s*($Ident)\s*\)\s*\(/rtrim($1) . " " . "\(\*$2\)\("/ex;
s/^(.\s*)$Declare\s*\(\s*\*\s*$Ident\s*\)\s*\(/$1 . $declare . $post_declare_space . '(*' . $funcname . ')('/ex;
}
}