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-rw-r--r--fs/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index 9774588da60e..bc821a86d965 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -58,6 +58,13 @@ config FS_DAX_PMD
depends on ZONE_DEVICE
depends on TRANSPARENT_HUGEPAGE
+# Selected by DAX drivers that do not expect filesystem DAX to support
+# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
+# for fork() of processes with MAP_SHARED mappings or support for
+# direct-I/O to a DAX mapping.
+config FS_DAX_LIMITED
+ bool
+
endif # BLOCK
# Posix ACL utility routines