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mm: rename __alloc_page_frag to page_frag_alloc and __free_page_frag to page_frag_free

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Patch series "Page fragment updates", v4.

This patch series takes care of a few cleanups for the page fragments
API.

First we do some renames so that things are much more consistent.  First
we move the page_frag_ portion of the name to the front of the functions
names.  Secondly we split out the cache specific functions from the
other page fragment functions by adding the word "cache" to the name.

Finally I added a bit of documentation that will hopefully help to
explain some of this.  I plan to revisit this later as we get things
more ironed out in the near future with the changes planned for the DMA
setup to support eXpress Data Path.

This patch (of 3):

This patch renames the page frag functions to be more consistent with
other APIs.  Specifically we place the name page_frag first in the name
and then have either an alloc or free call name that we append as the
suffix.  This makes it a bit clearer in terms of naming.

In addition we drop the leading double underscores since we are
technically no longer a backing interface and instead the front end that
is called from the networking APIs.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alexander Duyck 2017-01-10 16:58:06 -08:00 • committed by Linus Torvalds
commit 8c2dd3e4a4
4 changed files with 13 additions and 13 deletions
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10
mm/page_alloc.c
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@ -3931,8 +3931,8 @@ void __page_frag_drain(struct page *page, unsigned int order,
}
EXPORT_SYMBOL(__page_frag_drain);
void *__alloc_page_frag(struct page_frag_cache *nc,
unsigned int fragsz, gfp_t gfp_mask)
void *page_frag_alloc(struct page_frag_cache *nc,
unsigned int fragsz, gfp_t gfp_mask)
{
unsigned int size = PAGE_SIZE;
struct page *page;
@ -3983,19 +3983,19 @@ refill:
return nc->va + offset;
}
EXPORT_SYMBOL(__alloc_page_frag);
EXPORT_SYMBOL(page_frag_alloc);
/*
* Frees a page fragment allocated out of either a compound or order 0 page.
*/
void __free_page_frag(void *addr)
void page_frag_free(void *addr)
{
struct page *page = virt_to_head_page(addr);
if (unlikely(put_page_testzero(page)))
__free_pages_ok(page, compound_order(page));
}
EXPORT_SYMBOL(__free_page_frag);
EXPORT_SYMBOL(page_frag_free);
static void *make_alloc_exact(unsigned long addr, unsigned int order,
size_t size)