AcoSail/kernel_optimize_test
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mm/page_ref: use page_ref helper instead of direct modification of _count

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page_reference manipulation functions are introduced to track down
reference count change of the page.  Use it instead of direct
modification of _count.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Sunil Goutham <sgoutham@cavium.com>
Cc: Chris Metcalf <cmetcalf@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:
Joonsoo Kim 2016-05-19 17:10:46 -07:00 committed by Linus Torvalds
parent 43efd3ea64
commit 6d061f9f61
4 changed files with 4 additions and 4 deletions
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2
drivers/net/ethernet/cavium/thunder/nicvf_queues.c
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@ -23,7 +23,7 @@ static void nicvf_get_page(struct nicvf *nic)
if (!nic->rb_pageref || !nic->rb_page) if (!nic->rb_pageref || !nic->rb_page)
return; return;
atomic_add(nic->rb_pageref, &nic->rb_page->_count); page_ref_add(nic->rb_page, nic->rb_pageref);
nic->rb_pageref = 0; nic->rb_pageref = 0;
} }

2
drivers/net/ethernet/qlogic/qede/qede_main.c
View File

@ -920,7 +920,7 @@ static inline int qede_realloc_rx_buffer(struct qede_dev *edev,
* network stack to take the ownership of the page * network stack to take the ownership of the page
* which can be recycled multiple times by the driver. * which can be recycled multiple times by the driver.
*/ */
atomic_inc(&curr_cons->data->_count); page_ref_inc(curr_cons->data);
qede_reuse_page(edev, rxq, curr_cons); qede_reuse_page(edev, rxq, curr_cons);
} }

2
mm/filemap.c
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@ -213,7 +213,7 @@ void __delete_from_page_cache(struct page *page, void *shadow)
* some other bad page check should catch it later. * some other bad page check should catch it later.
*/ */
page_mapcount_reset(page); page_mapcount_reset(page);
atomic_sub(mapcount, &page->_count); page_ref_sub(page, mapcount);
} }
} }

2
net/wireless/util.c
View File

@ -651,7 +651,7 @@ __frame_add_frag(struct sk_buff *skb, struct page *page,
struct skb_shared_info *sh = skb_shinfo(skb); struct skb_shared_info *sh = skb_shinfo(skb);
int page_offset; int page_offset;
atomic_inc(&page->_count); page_ref_inc(page);
page_offset = ptr - page_address(page); page_offset = ptr - page_address(page);
skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
} }