Avoid taking waitqueue lock in dmapool

[mirror_ubuntu-bionic-kernel.git] / mm / page-writeback.c

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 81a91e6f1f99983ade59cc723bef2a07ad67f0fa..d55cfcae2ef1fea2082d28173dd2f94e1e6666ce 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -297,20 +297,12 @@ get_dirty_limits(long *pbackground, long *pdirty, long *pbdi_dirty,
 {
        int background_ratio;           /* Percentages */
        int dirty_ratio;
-       int unmapped_ratio;
        long background;
        long dirty;
        unsigned long available_memory = determine_dirtyable_memory();
        struct task_struct *tsk;
 
-       unmapped_ratio = 100 - ((global_page_state(NR_FILE_MAPPED) +
-                               global_page_state(NR_ANON_PAGES)) * 100) /
-                                       available_memory;
-
        dirty_ratio = vm_dirty_ratio;
-       if (dirty_ratio > unmapped_ratio / 2)
-               dirty_ratio = unmapped_ratio / 2;
-
        if (dirty_ratio < 5)
                dirty_ratio = 5;