Since switching to the new page table range API, we do not set the
PG_arch_1 (aka dcache clean) flag on tail pages, only on the folio.
Test it on the folio. Also use page_mapped() instead of page_mapcount()
as it is more efficient.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
arch/sh/mm/cache-sh4.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 862046f26981..cea8f1693908 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -241,13 +241,14 @@ static void sh4_flush_cache_page(void *args)
if ((vma->vm_mm == current->active_mm))
vaddr = NULL;
else {
+ struct folio *folio = page_folio(page);
/*
* Use kmap_coherent or kmap_atomic to do flushes for
* another ASID than the current one.
*/
map_coherent = (current_cpu_data.dcache.n_aliases &&
- test_bit(PG_dcache_clean, &page->flags) &&
- page_mapcount(page));
+ test_bit(PG_dcache_clean, folio_flags(folio)) &&
+ page_mapped(page));
if (map_coherent)
vaddr = kmap_coherent(page, address);
else
--
2.43.0
