1 files changed, 15 insertions, 5 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index c5db9a7264d9..75f49d312e8c 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -14,7 +14,6 @@
 #include <linux/highmem.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
-#include <linux/mutex.h>
 #include <linux/interrupt.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
@@ -24,6 +23,7 @@
 #include <linux/rbtree.h>
 #include <linux/radix-tree.h>
 #include <linux/rcupdate.h>
+#include <linux/bootmem.h>
 
 #include <asm/atomic.h>
 #include <asm/uaccess.h>
@@ -495,7 +495,7 @@ static atomic_t vmap_lazy_nr = ATOMIC_INIT(0);
 static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
                                         int sync, int force_flush)
 {
-        static DEFINE_MUTEX(purge_lock);
+        static DEFINE_SPINLOCK(purge_lock);
         LIST_HEAD(valist);
         struct vmap_area *va;
         int nr = 0;
@@ -506,10 +506,10 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
          * the case that isn't actually used at the moment anyway.
          */
         if (!sync && !force_flush) {
-                if (!mutex_trylock(&purge_lock))
+                if (!spin_trylock(&purge_lock))
                         return;
         } else
-                mutex_lock(&purge_lock);
+                spin_lock(&purge_lock);
 
         rcu_read_lock();
         list_for_each_entry_rcu(va, &vmap_area_list, list) {
@@ -541,7 +541,7 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
                         __free_vmap_area(va);
                 spin_unlock(&vmap_area_lock);
         }
-        mutex_unlock(&purge_lock);
+        spin_unlock(&purge_lock);
 }
 
 /*
@@ -984,6 +984,8 @@ EXPORT_SYMBOL(vm_map_ram);
 
 void __init vmalloc_init(void)
 {
+        struct vmap_area *va;
+        struct vm_struct *tmp;
         int i;
 
         for_each_possible_cpu(i) {
@@ -996,6 +998,14 @@ void __init vmalloc_init(void)
                 vbq->nr_dirty = 0;
         }
 
+        /* Import existing vmlist entries. */
+        for (tmp = vmlist; tmp; tmp = tmp->next) {
+                va = alloc_bootmem(sizeof(struct vmap_area));
+                va->flags = tmp->flags | VM_VM_AREA;
+                va->va_start = (unsigned long)tmp->addr;
+                va->va_end = va->va_start + tmp->size;
+                __insert_vmap_area(va);
+        }
         vmap_initialized = true;
 }