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mm/page_alloc.c: use a single function to free page 

There are multiple places of freeing a page, they all do the same things
so a common function can be used to reduce code duplicate.

It also avoids bug fixed in one function but left in another.

Link: http://lkml.kernel.org/r/20181119134834.17765-3-aaron.lu@intel.com
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pankaj gupta <pagupta@redhat.com>
Cc: Pawel Staszewski <pstaszewski@itcare.pl>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aaron Lu 2018-12-28 00:35:22 -08:00 committed by Linus Torvalds
parent 65895b67ad
commit 742aa7fb52
1 changed files with 14 additions and 23 deletions
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37
mm/page_alloc.c
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@ -4427,16 +4427,19 @@ unsigned long get_zeroed_page(gfp_t gfp_mask)
}
EXPORT_SYMBOL(get_zeroed_page);
void __free_pages(struct page *page, unsigned int order)
static inline void free_the_page(struct page *page, unsigned int order)
{
if (put_page_testzero(page)) {
if (order == 0)
free_unref_page(page);
else
__free_pages_ok(page, order);
}
if (order == 0) /* Via pcp? */
free_unref_page(page);
else
__free_pages_ok(page, order);
}
void __free_pages(struct page *page, unsigned int order)
{
if (put_page_testzero(page))
free_the_page(page, order);
}
EXPORT_SYMBOL(__free_pages);
void free_pages(unsigned long addr, unsigned int order)
@ -4485,14 +4488,8 @@ void __page_frag_cache_drain(struct page *page, unsigned int count)
{
VM_BUG_ON_PAGE(page_ref_count(page) == 0, page);
if (page_ref_sub_and_test(page, count)) {
unsigned int order = compound_order(page);
if (order == 0)
free_unref_page(page);
else
__free_pages_ok(page, order);
}
if (page_ref_sub_and_test(page, count))
free_the_page(page, compound_order(page));
}
EXPORT_SYMBOL(__page_frag_cache_drain);
@ -4557,14 +4554,8 @@ void page_frag_free(void *addr)
{
struct page *page = virt_to_head_page(addr);
if (unlikely(put_page_testzero(page))) {
unsigned int order = compound_order(page);
if (order == 0) /* Via pcp? */
free_unref_page(page);
else
__free_pages_ok(page, order);
}
if (unlikely(put_page_testzero(page)))
free_the_page(page, compound_order(page));
}
EXPORT_SYMBOL(page_frag_free);