[PATCH RFC v2 12/12] mm/memremap: Remove unused devmap_managed_key

[Alistair Popple]

It's no longer used so remove it.

Signed-off-by: Alistair Popple <apop...@nvidia.com>
---
 mm/memremap.c | 27 ---------------------------
 1 file changed, 27 deletions(-)

diff --git a/mm/memremap.c b/mm/memremap.c
index d875534..e40672b 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -38,30 +38,6 @@ unsigned long memremap_compat_align(void)
 EXPORT_SYMBOL_GPL(memremap_compat_align);
 #endif
 
-#ifdef CONFIG_FS_DAX
-DEFINE_STATIC_KEY_FALSE(devmap_managed_key);
-EXPORT_SYMBOL(devmap_managed_key);
-
-static void devmap_managed_enable_put(struct dev_pagemap *pgmap)
-{
-       if (pgmap->type == MEMORY_DEVICE_FS_DAX)
-               static_branch_dec(&devmap_managed_key);
-}
-
-static void devmap_managed_enable_get(struct dev_pagemap *pgmap)
-{
-       if (pgmap->type == MEMORY_DEVICE_FS_DAX)
-               static_branch_inc(&devmap_managed_key);
-}
-#else
-static void devmap_managed_enable_get(struct dev_pagemap *pgmap)
-{
-}
-static void devmap_managed_enable_put(struct dev_pagemap *pgmap)
-{
-}
-#endif /* CONFIG_FS_DAX */
-
 static void pgmap_array_delete(struct range *range)
 {
        xa_store_range(&pgmap_array, PHYS_PFN(range->start), 
PHYS_PFN(range->end),
@@ -150,7 +126,6 @@ void memunmap_pages(struct dev_pagemap *pgmap)
        percpu_ref_exit(&pgmap->ref);
 
        WARN_ONCE(pgmap->altmap.alloc, "failed to free all reserved pages\n");
-       devmap_managed_enable_put(pgmap);
 }
 EXPORT_SYMBOL_GPL(memunmap_pages);
 
@@ -353,8 +328,6 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
        if (error)
                return ERR_PTR(error);
 
-       devmap_managed_enable_get(pgmap);
-
        /*
         * Clear the pgmap nr_range as it will be incremented for each
         * successfully processed range. This communicates how many
-- 
git-series 0.9.1