KVM: x86/speculation: Disable Fill buffer clear within guests

[mirror_ubuntu-jammy-kernel.git] / mm / backing-dev.c

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 4a9d4e27d0d9b0f62a29a783f524df6e7396f2d3..02ff66f86358733188e79df8946a6b1aa4cf54ed 100644 (file)
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -947,6 +947,13 @@ void bdi_unregister(struct backing_dev_info *bdi)
        wb_shutdown(&bdi->wb);
        cgwb_bdi_unregister(bdi);
 
+       /*
+        * If this BDI's min ratio has been set, use bdi_set_min_ratio() to
+        * update the global bdi_min_ratio.
+        */
+       if (bdi->min_ratio)
+               bdi_set_min_ratio(bdi, 0);
+
        if (bdi->dev) {
                bdi_debug_unregister(bdi);
                device_unregister(bdi->dev);