1 files changed, 11 insertions, 13 deletions

diff --git a/kernel/kmod.c b/kernel/kmod.c
index 957a7aab8ebc..4079ac1d5e79 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -339,17 +339,24 @@ static DECLARE_WAIT_QUEUE_HEAD(running_helpers_waitq);
  */
 #define RUNNING_HELPERS_TIMEOUT (5 * HZ)
 
-void read_lock_usermodehelper(void)
+int usermodehelper_read_trylock(void)
 {
+        int ret = 0;
+
         down_read(&umhelper_sem);
+        if (usermodehelper_disabled) {
+                up_read(&umhelper_sem);
+                ret = -EAGAIN;
+        }
+        return ret;
 }
-EXPORT_SYMBOL_GPL(read_lock_usermodehelper);
+EXPORT_SYMBOL_GPL(usermodehelper_read_trylock);
 
-void read_unlock_usermodehelper(void)
+void usermodehelper_read_unlock(void)
 {
         up_read(&umhelper_sem);
 }
-EXPORT_SYMBOL_GPL(read_unlock_usermodehelper);
+EXPORT_SYMBOL_GPL(usermodehelper_read_unlock);
 
 /**
  * usermodehelper_disable - prevent new helpers from being started
@@ -390,15 +397,6 @@ void usermodehelper_enable(void)
         up_write(&umhelper_sem);
 }
 
-/**
- * usermodehelper_is_disabled - check if new helpers are allowed to be started
- */
-bool usermodehelper_is_disabled(void)
-{
-        return usermodehelper_disabled;
-}
-EXPORT_SYMBOL_GPL(usermodehelper_is_disabled);
-
 static void helper_lock(void)
 {
         atomic_inc(&running_helpers);