num_poisoned_pages_inc/dec had better be visible to some file like
mm/sparse.c and mm/page_alloc.c (for a subsequent patch). So let's
move it to include/linux/mm.h.
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
---
include/linux/mm.h | 13 ++++++++++++-
include/linux/swapops.h | 16 ----------------
mm/sparse.c | 2 +-
3 files changed, 13 insertions(+), 18 deletions(-)
diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
index 59df394..22623ba 100644
--- v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h
+++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
@@ -2741,7 +2741,7 @@ extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
extern int soft_offline_page(struct page *page, int flags);
-
+#ifdef CONFIG_MEMORY_FAILURE
/*
* Error handlers for various types of pages.
*/
@@ -2777,6 +2777,17 @@ enum mf_action_page_type {
MF_MSG_UNKNOWN,
};
+static inline void num_poisoned_pages_inc(void)
+{
+ atomic_long_inc(&num_poisoned_pages);
+}
+
+static inline void num_poisoned_pages_dec(void)
+{
+ atomic_long_dec(&num_poisoned_pages);
+}
+#endif
+
#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
extern void clear_huge_page(struct page *page,
unsigned long addr_hint,
diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
index 4d96166..88137e9 100644
--- v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h
+++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
@@ -320,8 +320,6 @@ static inline int is_pmd_migration_entry(pmd_t pmd)
#ifdef CONFIG_MEMORY_FAILURE
-extern atomic_long_t num_poisoned_pages __read_mostly;
-
/*
* Support for hardware poisoned pages
*/
@@ -336,16 +334,6 @@ static inline int is_hwpoison_entry(swp_entry_t entry)
return swp_type(entry) == SWP_HWPOISON;
}
-static inline void num_poisoned_pages_inc(void)
-{
- atomic_long_inc(&num_poisoned_pages);
-}
-
-static inline void num_poisoned_pages_dec(void)
-{
- atomic_long_dec(&num_poisoned_pages);
-}
-
#else
static inline swp_entry_t make_hwpoison_entry(struct page *page)
@@ -357,10 +345,6 @@ static inline int is_hwpoison_entry(swp_entry_t swp)
{
return 0;
}
-
-static inline void num_poisoned_pages_inc(void)
-{
-}
#endif
#if defined(CONFIG_MEMORY_FAILURE) || defined(CONFIG_MIGRATION)
diff --git v4.19-mmotm-2018-10-30-16-08/mm/sparse.c v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
index 33307fc..7ada2e5 100644
--- v4.19-mmotm-2018-10-30-16-08/mm/sparse.c
+++ v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
@@ -726,7 +726,7 @@ static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
for (i = 0; i < nr_pages; i++) {
if (PageHWPoison(&memmap[i])) {
- atomic_long_sub(1, &num_poisoned_pages);
+ num_poisoned_pages_dec();
ClearPageHWPoison(&memmap[i]);
}
}
--
2.7.0
