[PATCH 1/2 V2] checkpatch: Warn on use of yield()

[Joe Perches <joe@perches.com>]

Using yield() is generally wrong.  Warn on its use.

Signed-off-by: Joe Perches <joe@perches.com>
---

V2: Test checkpatches first next time...
    Add missing close parenthesis

 scripts/checkpatch.pl |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 04eb9eb..135cb8f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3344,6 +3344,12 @@ sub process {
 			     "__func__ should be used instead of gcc specific __FUNCTION__\n"  . $herecurr);
 		}
 
+# check for use of yield()
+		if ($line =~ /\byield\s*\(\s*\)/) {
+			WARN("YIELD",
+			     "Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n"  . $herecurr);
+		}
+
 # check for semaphores initialized locked
 		if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
 			WARN("CONSIDER_COMPLETION",