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-rw-r--r--fs/dax.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/dax.c b/fs/dax.c
index 2e48c7e..d2c90bf 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -720,12 +720,11 @@ static void *dax_insert_entry(struct xa_state *xas,
xas_reset(xas);
xas_lock_irq(xas);
- if (dax_entry_size(entry) != dax_entry_size(new_entry)) {
+ if (dax_is_zero_entry(entry) || dax_is_empty_entry(entry)) {
+ void *old;
+
dax_disassociate_entry(entry, mapping, false);
dax_associate_entry(new_entry, mapping, vmf->vma, vmf->address);
- }
-
- if (dax_is_zero_entry(entry) || dax_is_empty_entry(entry)) {
/*
* Only swap our new entry into the page cache if the current
* entry is a zero page or an empty entry. If a normal PTE or
@@ -734,7 +733,7 @@ static void *dax_insert_entry(struct xa_state *xas,
* existing entry is a PMD, we will just leave the PMD in the
* tree and dirty it if necessary.
*/
- void *old = dax_lock_entry(xas, new_entry);
+ old = dax_lock_entry(xas, new_entry);
WARN_ON_ONCE(old != xa_mk_value(xa_to_value(entry) |
DAX_LOCKED));
entry = new_entry;