ASoC: stm32: sai: fix kernel rate configuration

Merge series from Olivier Moysan <olivier.moysan@foss.st.com>:

This patchset adds some checks on kernel minimum rate requirements.
This avoids potential clock rate misconfiguration, when setting the
kernel frequency on STM32MP2 SoCs.

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index b7f13f087954..bf55206935c4 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1218,6 +1218,23 @@ static inline unsigned int folio_order(const struct folio *folio)
 	return folio_large_order(folio);
 }
 
+/**
+ * folio_reset_order - Reset the folio order and derived _nr_pages
+ * @folio: The folio.
+ *
+ * Reset the order and derived _nr_pages to 0. Must only be used in the
+ * process of splitting large folios.
+ */
+static inline void folio_reset_order(struct folio *folio)
+{
+	if (WARN_ON_ONCE(!folio_test_large(folio)))
+		return;
+	folio->_flags_1 &= ~0xffUL;
+#ifdef NR_PAGES_IN_LARGE_FOLIO
+	folio->_nr_pages = 0;
+#endif
+}
+
 #include <linux/huge_mm.h>
 
 /*