Merge tag 'powerpc-6.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...

[linux-block.git] / include / linux / pagevec.h

diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h
index 87cc678adc850b12f144052fc7b4cf50d32ad107..fcc06c300a72c3797751279dbeaec17b1e3f65aa 100644 (file)
--- a/include/linux/pagevec.h
+++ b/include/linux/pagevec.h
@@ -27,6 +27,7 @@ struct folio;
  */
 struct folio_batch {
        unsigned char nr;
+       unsigned char i;
        bool percpu_pvec_drained;
        struct folio *folios[PAGEVEC_SIZE];
 };
@@ -40,12 +41,14 @@ struct folio_batch {
 static inline void folio_batch_init(struct folio_batch *fbatch)
 {
        fbatch->nr = 0;
+       fbatch->i = 0;
        fbatch->percpu_pvec_drained = false;
 }
 
 static inline void folio_batch_reinit(struct folio_batch *fbatch)
 {
        fbatch->nr = 0;
+       fbatch->i = 0;
 }
 
 static inline unsigned int folio_batch_count(struct folio_batch *fbatch)
@@ -75,6 +78,21 @@ static inline unsigned folio_batch_add(struct folio_batch *fbatch,
        return folio_batch_space(fbatch);
 }
 
+/**
+ * folio_batch_next - Return the next folio to process.
+ * @fbatch: The folio batch being processed.
+ *
+ * Use this function to implement a queue of folios.
+ *
+ * Return: The next folio in the queue, or NULL if the queue is empty.
+ */
+static inline struct folio *folio_batch_next(struct folio_batch *fbatch)
+{
+       if (fbatch->i == fbatch->nr)
+               return NULL;
+       return fbatch->folios[fbatch->i++];
+}
+
 void __folio_batch_release(struct folio_batch *pvec);
 
 static inline void folio_batch_release(struct folio_batch *fbatch)