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-rw-r--r--cpukit/score/src/userextremoveset.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/cpukit/score/src/userextremoveset.c b/cpukit/score/src/userextremoveset.c
index e90ff77e72..64fb166d9f 100644
--- a/cpukit/score/src/userextremoveset.c
+++ b/cpukit/score/src/userextremoveset.c
@@ -20,6 +20,7 @@
#endif
#include <rtems/score/userextimpl.h>
+#include <rtems/score/percpu.h>
void _User_extensions_Remove_set (
User_extensions_Control *the_extension
@@ -31,6 +32,11 @@ void _User_extensions_Remove_set (
* If a switch handler is present, remove it.
*/
- if ( the_extension->Callouts.thread_switch != NULL )
- _Chain_Extract( &the_extension->Switch.Node );
+ if ( the_extension->Callouts.thread_switch != NULL ) {
+ ISR_Level level;
+
+ _Per_CPU_Acquire_all( level );
+ _Chain_Extract_unprotected( &the_extension->Switch.Node );
+ _Per_CPU_Release_all( level );
+ }
}