revert "mm: vmalloc use mutex for purge"

[linux-2.6-omap-h63xx.git] / mm / vmalloc.c

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 7e00b280648a2275a65acc17a696142c5de857d0..75f49d312e8c1d47648f3e96b8a1eb6d14076405 100644 (file)
--- 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>
@@ -496,7 +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;
@@ -507,10 +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) {
@@ -542,7 +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);
 }
 
 /*