[PATCH 7.2 v3 05/12] mm: remove READ_ONLY_THP_FOR_FS Kconfig option

[Zi Yan]

After removing READ_ONLY_THP_FOR_FS check in file_thp_enabled(),
khugepaged and MADV_COLLAPSE can run on FSes with PMD THP pagecache
support even without READ_ONLY_THP_FOR_FS enabled. Remove the Kconfig first
so that no one can use READ_ONLY_THP_FOR_FS as upcoming commits remove
mapping->nr_thps, which its safe guard mechanism relies on.

Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@xxxxxxxxxx>
Acked-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>
Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
---
 mm/Kconfig | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index bd283958d675..408fc7b82233 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -937,17 +937,6 @@ config THP_SWAP
 
 	  For selection by architectures with reasonable THP sizes.
 
-config READ_ONLY_THP_FOR_FS
-	bool "Read-only THP for filesystems (EXPERIMENTAL)"
-	depends on TRANSPARENT_HUGEPAGE
-
-	help
-	  Allow khugepaged to put read-only file-backed pages in THP.
-
-	  This is marked experimental because it is a new feature. Write
-	  support of file THPs will be developed in the next few release
-	  cycles.
-
 config NO_PAGE_MAPCOUNT
 	bool "No per-page mapcount (EXPERIMENTAL)"
 	help
-- 
2.43.0