remove libdss from Makefile

[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / mm / vmacache.c

diff --git a/mm/vmacache.c b/mm/vmacache.c
index 7ffa0ee341b5dab136b34d4d79c54a040569ada0..f1729617dc85c0fb39c629e1a5d6e2cc2660b9f1 100644 (file)
--- a/mm/vmacache.c
+++ b/mm/vmacache.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2014 Davidlohr Bueso.
  */
@@ -6,44 +7,6 @@
 #include <linux/mm.h>
 #include <linux/vmacache.h>
 
-/*
- * Flush vma caches for threads that share a given mm.
- *
- * The operation is safe because the caller holds the mmap_sem
- * exclusively and other threads accessing the vma cache will
- * have mmap_sem held at least for read, so no extra locking
- * is required to maintain the vma cache.
- */
-void vmacache_flush_all(struct mm_struct *mm)
-{
-       struct task_struct *g, *p;
-
-       count_vm_vmacache_event(VMACACHE_FULL_FLUSHES);
-
-       /*
-        * Single threaded tasks need not iterate the entire
-        * list of process. We can avoid the flushing as well
-        * since the mm's seqnum was increased and don't have
-        * to worry about other threads' seqnum. Current's
-        * flush will occur upon the next lookup.
-        */
-       if (atomic_read(&mm->mm_users) == 1)
-               return;
-
-       rcu_read_lock();
-       for_each_process_thread(g, p) {
-               /*
-                * Only flush the vmacache pointers as the
-                * mm seqnum is already set and curr's will
-                * be set upon invalidation when the next
-                * lookup is done.
-                */
-               if (mm == p->mm)
-                       vmacache_flush(p);
-       }
-       rcu_read_unlock();
-}
-
 /*
  * This task may be accessing a foreign mm via (for example)
  * get_user_pages()->find_vma().  The vmacache is task-local and this