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SubjectRe: [PATCH 4/6] mm: remove free_unmap_vmap_area_addr
Hi Christoph,

On Mon, Oct 17, 2016 at 11:56 PM, Christoph Hellwig <hch@lst.de> wrote:
> Just inline it into the only caller.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> mm/vmalloc.c | 21 ++++++++-------------
> 1 file changed, 8 insertions(+), 13 deletions(-)
>
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index 8cedfa0..2af2921 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -717,16 +717,6 @@ static struct vmap_area *find_vmap_area(unsigned long addr)
> return va;
> }
>
> -static void free_unmap_vmap_area_addr(unsigned long addr)
> -{
> - struct vmap_area *va;
> -
> - va = find_vmap_area(addr);
> - BUG_ON(!va);
> - free_unmap_vmap_area(va);
> -}
> -
> -
> /*** Per cpu kva allocator ***/
>
> /*
> @@ -1090,6 +1080,7 @@ void vm_unmap_ram(const void *mem, unsigned int count)
> {
> unsigned long size = (unsigned long)count << PAGE_SHIFT;
> unsigned long addr = (unsigned long)mem;
> + struct vmap_area *va;
>
> might_sleep();
> BUG_ON(!addr);
> @@ -1100,10 +1091,14 @@ void vm_unmap_ram(const void *mem, unsigned int count)
> debug_check_no_locks_freed(mem, size);
> vmap_debug_free_range(addr, addr+size);
>
> - if (likely(count <= VMAP_MAX_ALLOC))
> + if (likely(count <= VMAP_MAX_ALLOC)) {
> vb_free(mem, size);
> - else
> - free_unmap_vmap_area_addr(addr);
> + return;
> + }
> +
> + va = find_vmap_area(addr);
> + BUG_ON(!va);

Considering recent objections to BUG_ON [1], lets make this a WARN_ON
while we're moving the code?

> + free_unmap_vmap_area(va);
> }
> EXPORT_SYMBOL(vm_unmap_ram);
>
> --
> 2.1.4

Thanks,

Joel

[1] https://lkml.org/lkml/2016/10/6/65

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