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-rw-r--r--fs/dax.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/fs/dax.c b/fs/dax.c
index ce87d21b3805..5426252375f6 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -98,12 +98,6 @@ static void *dax_make_entry(pfn_t pfn, unsigned long flags)
return xa_mk_value(flags | (pfn_t_to_pfn(pfn) << DAX_SHIFT));
}
-static void *dax_make_page_entry(struct page *page)
-{
- pfn_t pfn = page_to_pfn_t(page);
- return dax_make_entry(pfn, PageHead(page) ? DAX_PMD : 0);
-}
-
static bool dax_is_locked(void *entry)
{
return xa_to_value(entry) & DAX_LOCKED;
@@ -116,12 +110,12 @@ static unsigned int dax_entry_order(void *entry)
return 0;
}
-static int dax_is_pmd_entry(void *entry)
+static unsigned long dax_is_pmd_entry(void *entry)
{
return xa_to_value(entry) & DAX_PMD;
}
-static int dax_is_pte_entry(void *entry)
+static bool dax_is_pte_entry(void *entry)
{
return !(xa_to_value(entry) & DAX_PMD);
}
@@ -413,11 +407,16 @@ void dax_unlock_mapping_entry(struct page *page)
{
struct address_space *mapping = page->mapping;
XA_STATE(xas, &mapping->i_pages, page->index);
+ void *entry;
if (S_ISCHR(mapping->host->i_mode))
return;
- dax_unlock_entry(&xas, dax_make_page_entry(page));
+ rcu_read_lock();
+ entry = xas_load(&xas);
+ rcu_read_unlock();
+ entry = dax_make_entry(page_to_pfn_t(page), dax_is_pmd_entry(entry));
+ dax_unlock_entry(&xas, entry);
}
/*