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mm: make rmap_walk() return void

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There is no user of the return value from rmap_walk() and friends so
this patch makes them void-returning functions.

Link: http://lkml.kernel.org/r/1489555493-14659-9-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Minchan Kim
2017-05-03 14:54:23 -07:00
committed by Linus Torvalds
parent 666e5a406c
commit 1df631ae19
4 changed files with 23 additions and 34 deletions
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16
mm/ksm.c
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@@ -1933,11 +1933,10 @@ struct page *ksm_might_need_to_copy(struct page *page,
return new_page;
}
int rmap_walk_ksm(struct page *page, struct rmap_walk_control *rwc)
void rmap_walk_ksm(struct page *page, struct rmap_walk_control *rwc)
{
struct stable_node *stable_node;
struct rmap_item *rmap_item;
int ret = SWAP_AGAIN;
int search_new_forks = 0;
VM_BUG_ON_PAGE(!PageKsm(page), page);
@@ -1950,7 +1949,7 @@ int rmap_walk_ksm(struct page *page, struct rmap_walk_control *rwc)
stable_node = page_stable_node(page);
if (!stable_node)
return ret;
return;
again:
hlist_for_each_entry(rmap_item, &stable_node->hlist, hlist) {
struct anon_vma *anon_vma = rmap_item->anon_vma;
@@ -1978,23 +1977,20 @@ again:
if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))
continue;
ret = rwc->rmap_one(page, vma,
rmap_item->address, rwc->arg);
if (ret != SWAP_AGAIN) {
if (SWAP_AGAIN != rwc->rmap_one(page, vma,
rmap_item->address, rwc->arg)) {
anon_vma_unlock_read(anon_vma);
goto out;
return;
}
if (rwc->done && rwc->done(page)) {
anon_vma_unlock_read(anon_vma);
goto out;
return;
}
}
anon_vma_unlock_read(anon_vma);
}
if (!search_new_forks++)
goto again;
out:
return ret;
}
#ifdef CONFIG_MIGRATION