Changeset 44451 in vbox for trunk/src/VBox/Runtime

Timestamp:

Jan 30, 2013 7:58:43 AM (12 years ago)

Author:

vboxsync

Message:

BUGZ:6570 Add comment.

File:

• trunk/src/VBox/Runtime/r0drv/linux/spinlock-r0drv-linux.c (modified) (1 diff)

trunk/src/VBox/Runtime/r0drv/linux/spinlock-r0drv-linux.c

@@ -95 +95 @@
 #endif
 
+    /*
+       PLEASE DO NOT MODIFY THE NEXT FOUR LINES OF CODE!
+
+       We use this approach in order to split RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE and
+       RTSPINLOCK_FLAGS_INTERRUPT_SAFE spinlocks into separated locking classes when
+       CONFIG_PROVE_LOCKING kernel option is enabled. Using single spin_lock_init()
+       call will trigger kernel warning regarding to incorrect spinlock usage.
+     */
     if (fFlags == RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE)
         spin_lock_init(&pThis->Spinlock);