s390/guarded storage: simplify task exit handling
Free data structures required for guarded storage from
arch_release_task_struct(). This allows to simplify the code a bit,
and also makes the semantics a bit easier: arch_release_task_struct()
is never called from the task that is being removed.
In addition this allows to get rid of exit_thread() in a later patch.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/guarded_storage.c b/arch/s390/kernel/guarded_storage.c
index 4920cf6f..65b0eca 100644
--- a/arch/s390/kernel/guarded_storage.c
+++ b/arch/s390/kernel/guarded_storage.c
@@ -11,13 +11,10 @@
#include <asm/guarded_storage.h>
#include "entry.h"
-void exit_thread_gs(void)
+void guarded_storage_release(struct task_struct *tsk)
{
- preempt_disable();
- kfree(current->thread.gs_cb);
- kfree(current->thread.gs_bc_cb);
- current->thread.gs_cb = current->thread.gs_bc_cb = NULL;
- preempt_enable();
+ kfree(tsk->thread.gs_cb);
+ kfree(tsk->thread.gs_bc_cb);
}
static int gs_enable(void)
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index a7c6c5e..0ecadd3 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -48,8 +48,6 @@ extern void kernel_thread_starter(void);
*/
void exit_thread(struct task_struct *tsk)
{
- if (tsk == current)
- exit_thread_gs();
}
void flush_thread(void)
@@ -59,6 +57,7 @@ void flush_thread(void)
void arch_release_task_struct(struct task_struct *tsk)
{
runtime_instr_release(tsk);
+ guarded_storage_release(tsk);
}
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
