On Sun, 1 Feb 2015, green@xxxxxxxxxxxxxx wrote:
> From: Oleg Drokin <green@xxxxxxxxxxxxxx>
>
> vzalloc_node helpfully suggests to use __vmalloc_node if a more tight
> control over allocation flags is needed, but in fact __vmalloc_node
> is not only not exported, it's also static, so could not be used
> outside of mm/vmalloc.c
> Make it to be available as it was apparently intended.
>
__vmalloc_node() is for the generalized functionality that is needed for
the vmalloc API and not part of the API itself. I think what you want to
do is add a vmalloc_node_gfp(), or more specifically a vzalloc_node_gfp(),
to do GFP_NOFS when needed.
> Signed-off-by: Oleg Drokin <green@xxxxxxxxxxxxxx>
> ---
> include/linux/vmalloc.h | 3 +++
> mm/vmalloc.c | 10 ++++------
> 2 files changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
> index b87696f..7eb2c46 100644
> --- a/include/linux/vmalloc.h
> +++ b/include/linux/vmalloc.h
> @@ -73,6 +73,9 @@ extern void *vmalloc_exec(unsigned long size);
> extern void *vmalloc_32(unsigned long size);
> extern void *vmalloc_32_user(unsigned long size);
> extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
> +extern void *__vmalloc_node(unsigned long size, unsigned long align,
> + gfp_t gfp_mask, pgprot_t prot, int node,
> + const void *caller);
> extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
> unsigned long start, unsigned long end, gfp_t gfp_mask,
> pgprot_t prot, int node, const void *caller);
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index 39c3388..b882d95 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -1552,9 +1552,6 @@ void *vmap(struct page **pages, unsigned int count,
> }
> EXPORT_SYMBOL(vmap);
>
> -static void *__vmalloc_node(unsigned long size, unsigned long align,
> - gfp_t gfp_mask, pgprot_t prot,
> - int node, const void *caller);
> static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
> pgprot_t prot, int node)
> {
> @@ -1685,13 +1682,14 @@ fail:
> * allocator with @gfp_mask flags. Map them into contiguous
> * kernel virtual space, using a pagetable protection of @prot.
> */
> -static void *__vmalloc_node(unsigned long size, unsigned long align,
> - gfp_t gfp_mask, pgprot_t prot,
> - int node, const void *caller)
> +void *__vmalloc_node(unsigned long size, unsigned long align,
> + gfp_t gfp_mask, pgprot_t prot, int node,
> + const void *caller)
> {
> return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
> gfp_mask, prot, node, caller);
> }
> +EXPORT_SYMBOL(__vmalloc_node);
>
> void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
> {
--
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