Commit-ID: 9189c7e706038a508567cb2e46ccdb68b08f4ac7
Gitweb: https://git.kernel.org/tip/9189c7e706038a508567cb2e46ccdb68b08f4ac7
Author: Joe Perches <joe@xxxxxxxxxxx>
AuthorDate: Fri, 7 Sep 2018 15:26:18 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
CommitDate: Mon, 12 Nov 2018 09:03:59 -0800
checkpatch: Create table of obsolete APIs and apply to RCU
This patch creates a deprecated_apis map, which allows such APIs to
be flagged with suggested replacements more compactly and straightforwardly.
It also uses this map to flag the old flavorful RCU APIs as deprecated,
suggesting their vanilla-RCU counterparts as replacements.
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
Cc: Andy Whitcroft <apw@xxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
[ paulmck: Merged with earlier less-deft approach. ]
---
scripts/checkpatch.pl | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c883ec55654f..dd29e3c28166 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -573,6 +573,27 @@ foreach my $entry (@mode_permission_funcs) {
}
$mode_perms_search = "(?:${mode_perms_search})";
+our %deprecated_apis = (
+ "synchronize_rcu_bh" => "synchronize_rcu",
+ "synchronize_rcu_bh_expedited" => "synchronize_rcu_expedited",
+ "call_rcu_bh" => "call_rcu",
+ "rcu_barrier_bh" => "rcu_barrier",
+ "synchronize_sched" => "synchronize_rcu",
+ "synchronize_sched_expedited" => "synchronize_rcu_expedited",
+ "call_rcu_sched" => "call_rcu",
+ "rcu_barrier_sched" => "rcu_barrier",
+ "get_state_synchronize_sched" => "get_state_synchronize_rcu",
+ "cond_synchronize_sched" => "cond_synchronize_rcu",
+);
+
+#Create a search pattern for all these strings to speed up a loop below
+our $deprecated_apis_search = "";
+foreach my $entry (keys %deprecated_apis) {
+ $deprecated_apis_search .= '|' if ($deprecated_apis_search ne "");
+ $deprecated_apis_search .= $entry;
+}
+$deprecated_apis_search = "(?:${deprecated_apis_search})";
+
our $mode_perms_world_writable = qr{
S_IWUGO |
S_IWOTH |
@@ -6368,6 +6389,14 @@ sub process {
"please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr);
}
+# check for deprecated apis
+ if ($line =~ /\b($deprecated_apis_search)\b\s*\(/) {
+ my $deprecated_api = $1;
+ my $new_api = $deprecated_apis{$deprecated_api};
+ WARN("DEPRECATED_API",
+ "Deprecated use of '$deprecated_api', prefer '$new_api' instead\n" . $herecurr);
+ }
+
# check for various structs that are normally const (ops, kgdb, device_tree)
# and avoid what seem like struct definitions 'struct foo {'
if ($line !~ /\bconst\b/ &&
|