Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/mmu_context_32.h b/arch/sparc/include/asm/mmu_context_32.h
new file mode 100644
index 000000000..7ddcb8bad
--- /dev/null
+++ b/arch/sparc/include/asm/mmu_context_32.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __SPARC_MMU_CONTEXT_H
+#define __SPARC_MMU_CONTEXT_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm-generic/mm_hooks.h>
+
+static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
+{
+}
+
+/* Initialize a new mmu context.  This is invoked when a new
+ * address space instance (unique or shared) is instantiated.
+ */
+int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
+
+/* Destroy a dead context.  This occurs when mmput drops the
+ * mm_users count to zero, the mmaps have been released, and
+ * all the page tables have been flushed.  Our job is to destroy
+ * any remaining processor-specific state.
+ */
+void destroy_context(struct mm_struct *mm);
+
+/* Switch the current MM context. */
+void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
+	       struct task_struct *tsk);
+
+#define deactivate_mm(tsk,mm)	do { } while (0)
+
+/* Activate a new MM instance for the current task. */
+#define activate_mm(active_mm, mm) switch_mm((active_mm), (mm), NULL)
+
+#endif /* !(__ASSEMBLY__) */
+
+#endif /* !(__SPARC_MMU_CONTEXT_H) */