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authorHugh Dickins2022-05-21 19:53:04 -0700
committerakpm2022-05-25 10:47:47 -0700
commite384200e70664cd690cdadb72b2a1bc9dfcdec1a (patch)
treeac6e344668f89e63d722e1a0b3798011dc0f800f /mm/shmem.c
parent7fb6378701dc0d8f19c1ac4623b55f5125f0e286 (diff)
mm/shmem: fix shmem folio swapoff hang
Shmem swapoff makes no progress: the index to indices is not incremented. But "ret" is no longer a return value, so use folio_batch_count() instead. Link: https://lkml.kernel.org/r/c32bee8a-f0aa-245-f94e-24dd271924fa@google.com Fixes: da08e9b79323 ("mm/shmem: convert shmem_swapin_page() to shmem_swapin_folio()") Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Tested-by: Miaohe Lin <linmiaohe@huawei.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 7f41a24ed382..b8169beff226 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1164,7 +1164,6 @@ static int shmem_find_swap_entries(struct address_space *mapping,
XA_STATE(xas, &mapping->i_pages, start);
struct folio *folio;
swp_entry_t entry;
- unsigned int ret = 0;
rcu_read_lock();
xas_for_each(&xas, folio, ULONG_MAX) {
@@ -1178,7 +1177,7 @@ static int shmem_find_swap_entries(struct address_space *mapping,
if (swp_type(entry) != type)
continue;
- indices[ret] = xas.xa_index;
+ indices[folio_batch_count(fbatch)] = xas.xa_index;
if (!folio_batch_add(fbatch, folio))
break;