[PATCH 5/6] mm: turn vmap_purge_lock into a mutex

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 mm/vmalloc.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 2af2921..6c7eb8d 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -606,7 +606,7 @@ static atomic_t vmap_lazy_nr = ATOMIC_INIT(0);
  * by this look, but we want to avoid concurrent calls for performance
  * reasons and to make the pcpu_get_vm_areas more deterministic.
  */
-static DEFINE_SPINLOCK(vmap_purge_lock);
+static DEFINE_MUTEX(vmap_purge_lock);
 
 /* for per-CPU blocks */
 static void purge_fragmented_blocks_allcpus(void);
@@ -660,9 +660,9 @@ static bool __purge_vmap_area_lazy(unsigned long start, 
unsigned long end)
  */
 static void try_purge_vmap_area_lazy(void)
 {
-       if (spin_trylock(&vmap_purge_lock)) {
+       if (mutex_trylock(&vmap_purge_lock)) {
                __purge_vmap_area_lazy(ULONG_MAX, 0);
-               spin_unlock(&vmap_purge_lock);
+               mutex_unlock(&vmap_purge_lock);
        }
 }
 
@@ -671,10 +671,10 @@ static void try_purge_vmap_area_lazy(void)
  */
 static void purge_vmap_area_lazy(void)
 {
-       spin_lock(&vmap_purge_lock);
+       mutex_lock(&vmap_purge_lock);
        purge_fragmented_blocks_allcpus();
        __purge_vmap_area_lazy(ULONG_MAX, 0);
-       spin_unlock(&vmap_purge_lock);
+       mutex_unlock(&vmap_purge_lock);
 }
 
 /*
@@ -1063,11 +1063,11 @@ void vm_unmap_aliases(void)
                rcu_read_unlock();
        }
 
-       spin_lock(&vmap_purge_lock);
+       mutex_lock(&vmap_purge_lock);
        purge_fragmented_blocks_allcpus();
        if (!__purge_vmap_area_lazy(start, end) && flush)
                flush_tlb_kernel_range(start, end);
-       spin_unlock(&vmap_purge_lock);
+       mutex_unlock(&vmap_purge_lock);
 }
 EXPORT_SYMBOL_GPL(vm_unmap_aliases);
 
-- 
2.1.4