We will take a sleeping lock in later in this series, so this adds the
proper safeguards.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Tested-by: Jisheng Zhang <jszhang@xxxxxxxxxxx>
---
mm/vmalloc.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index bcc1a64..0e7f523 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -365,7 +365,7 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
BUG_ON(offset_in_page(size));
BUG_ON(!is_power_of_2(align));
- might_sleep_if(gfpflags_allow_blocking(gfp_mask));
+ might_sleep();
va = kmalloc_node(sizeof(struct vmap_area),
gfp_mask & GFP_RECLAIM_MASK, node);
@@ -1037,6 +1037,8 @@ void vm_unmap_aliases(void)
if (unlikely(!vmap_initialized))
return;
+ might_sleep();
+
for_each_possible_cpu(cpu) {
struct vmap_block_queue *vbq = &per_cpu(vmap_block_queue, cpu);
struct vmap_block *vb;
@@ -1080,6 +1082,7 @@ void vm_unmap_ram(const void *mem, unsigned int count)
unsigned long addr = (unsigned long)mem;
struct vmap_area *va;
+ might_sleep();
BUG_ON(!addr);
BUG_ON(addr < VMALLOC_START);
BUG_ON(addr > VMALLOC_END);
@@ -1431,6 +1434,8 @@ struct vm_struct *remove_vm_area(const void *addr)
{
struct vmap_area *va;
+ might_sleep();
+
va = find_vmap_area((unsigned long)addr);
if (va && va->flags & VM_VM_AREA) {
struct vm_struct *vm = va->vm;
--
2.1.4
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