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Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index f1cc03b..ba6b0f5 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -178,7 +178,7 @@ static int vmap_page_range(unsigned long addr, unsigned long end,
static inline int is_vmalloc_or_module_addr(const void *x)
{
/*
- * x86-64 and sparc64 put modules in a special place,
+ * ARM, x86-64 and sparc64 put modules in a special place,
* and fall back on vmalloc() if that fails. Others
* just put it in the vmalloc space.
*/
@@ -592,6 +592,8 @@ static void free_unmap_vmap_area_addr(unsigned long addr)
#define VMAP_BLOCK_SIZE (VMAP_BBMAP_BITS * PAGE_SIZE)
+static bool vmap_initialized __read_mostly = false;
+
struct vmap_block_queue {
spinlock_t lock;
struct list_head free;
@@ -828,6 +830,9 @@ void vm_unmap_aliases(void)
int cpu;
int flush = 0;
+ if (unlikely(!vmap_initialized))
+ return;
+
for_each_possible_cpu(cpu) {
struct vmap_block_queue *vbq = &per_cpu(vmap_block_queue, cpu);
struct vmap_block *vb;
@@ -942,6 +947,8 @@ void __init vmalloc_init(void)
INIT_LIST_HEAD(&vbq->dirty);
vbq->nr_dirty = 0;
}
+
+ vmap_initialized = true;
}
void unmap_kernel_range(unsigned long addr, unsigned long size)
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