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SubjectRe: [PATCH] Add __vunmap prototype
On Mon, 14 May 2007 17:07:03 +1000 Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:

> __vunmap is not static but I couldn't find a prototype for it, so this
> adds it. I need to use it in some powerpc patch to come.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>
> include/linux/vmalloc.h | 1 +
> 1 file changed, 1 insertion(+)
>
> Index: linux-cell/include/linux/vmalloc.h
> ===================================================================
> --- linux-cell.orig/include/linux/vmalloc.h 2007-05-14 16:03:42.000000000 +1000
> +++ linux-cell/include/linux/vmalloc.h 2007-05-14 16:03:47.000000000 +1000
> @@ -50,6 +50,7 @@ extern void vfree(void *addr);
> extern void *vmap(struct page **pages, unsigned int count,
> unsigned long flags, pgprot_t prot);
> extern void vunmap(void *addr);
> +extern void __vunmap(void *addr, int deallocate_pages);
>
> extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
> unsigned long pgoff);

um, the only possible reason for wanting to access __vunmap() is that you
want to do vunmap() from interrupt context, which is deadlockable.

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