5.5 merge

1 files changed, 3 insertions, 3 deletions

diff --git a/sql/set_var.cc b/sql/set_var.cc
index fc5c549b9de..fb691a9c095 100644
--- a/sql/set_var.cc
+++ b/sql/set_var.cc
@@ -216,7 +216,6 @@ uchar *sys_var::global_value_ptr(THD *thd, LEX_STRING *base)
 
 bool sys_var::check(THD *thd, set_var *var)
 {
-  do_deprecated_warning(thd);
   if ((var->value && do_check(thd, var))
       || (on_check && on_check(this, thd, var)))
   {
@@ -550,10 +549,10 @@ int mysql_del_sys_var_chain(sys_var *first)
 {
   int result= 0;
 
-  /* A write lock should be held on LOCK_system_variables_hash */
-
+  mysql_rwlock_wrlock(&LOCK_system_variables_hash);
   for (sys_var *var= first; var; var= var->next)
     result|= my_hash_delete(&system_variable_hash, (uchar*) var);
+  mysql_rwlock_unlock(&LOCK_system_variables_hash);
 
   return result;
 }
@@ -700,6 +699,7 @@ err:
 
 int set_var::check(THD *thd)
 {
+  var->do_deprecated_warning(thd);
   if (var->is_readonly())
   {
     my_error(ER_INCORRECT_GLOBAL_LOCAL_VAR, MYF(0), var->name.str, "read only");