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Subject[PATCH 04/10] mm,hwpoison: remove MF_COUNT_INCREASED
Date
From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

Now there's no user of MF_COUNT_INCREASED, so we can safely remove
it from all calling points.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Oscar Salvador <osalvador@suse.de>
---
include/linux/mm.h | 7 +++----
mm/memory-failure.c | 16 +++-------------
2 files changed, 6 insertions(+), 17 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ad6766a08f9b..fb36a4165a4e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2814,10 +2814,9 @@ void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
unsigned long nr_pages);

enum mf_flags {
- MF_COUNT_INCREASED = 1 << 0,
- MF_ACTION_REQUIRED = 1 << 1,
- MF_MUST_KILL = 1 << 2,
- MF_SOFT_OFFLINE = 1 << 3,
+ MF_ACTION_REQUIRED = 1 << 0,
+ MF_MUST_KILL = 1 << 1,
+ MF_SOFT_OFFLINE = 1 << 2,
};
extern int memory_failure(unsigned long pfn, int flags);
extern void memory_failure_queue(unsigned long pfn, int flags);
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index e43b61462fd5..1be785b25324 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1092,7 +1092,7 @@ static int memory_failure_hugetlb(unsigned long pfn, int flags)

num_poisoned_pages_inc();

- if (!(flags & MF_COUNT_INCREASED) && !get_hwpoison_page(p)) {
+ if (!get_hwpoison_page(p)) {
/*
* Check "filter hit" and "race with other subpage."
*/
@@ -1286,7 +1286,7 @@ int memory_failure(unsigned long pfn, int flags)
* In fact it's dangerous to directly bump up page count from 0,
* that may make page_ref_freeze()/page_ref_unfreeze() mismatch.
*/
- if (!(flags & MF_COUNT_INCREASED) && !get_hwpoison_page(p)) {
+ if (!get_hwpoison_page(p)) {
if (is_free_buddy_page(p)) {
action_result(pfn, MF_MSG_BUDDY, MF_DELAYED);
return 0;
@@ -1327,10 +1327,7 @@ int memory_failure(unsigned long pfn, int flags)
shake_page(p, 0);
/* shake_page could have turned it free. */
if (!PageLRU(p) && is_free_buddy_page(p)) {
- if (flags & MF_COUNT_INCREASED)
- action_result(pfn, MF_MSG_BUDDY, MF_DELAYED);
- else
- action_result(pfn, MF_MSG_BUDDY_2ND, MF_DELAYED);
+ action_result(pfn, MF_MSG_BUDDY_2ND, MF_DELAYED);
return 0;
}

@@ -1618,9 +1615,6 @@ static int __get_any_page(struct page *p, unsigned long pfn, int flags)
{
int ret;

- if (flags & MF_COUNT_INCREASED)
- return 1;
-
/*
* When the target page is a free hugepage, just remove it
* from free hugepage list.
@@ -1890,15 +1884,11 @@ int soft_offline_page(struct page *page, int flags)
if (is_zone_device_page(page)) {
pr_debug_ratelimited("soft_offline: %#lx page is device page\n",
pfn);
- if (flags & MF_COUNT_INCREASED)
- put_page(page);
return -EIO;
}

if (PageHWPoison(page)) {
pr_info("soft offline: %#lx page already poisoned\n", pfn);
- if (flags & MF_COUNT_INCREASED)
- put_hwpoison_page(page);
return -EBUSY;
}

--
2.12.3
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