On 11/8/20 12:37 AM, Barry Song wrote:
Without DEBUG_FS, all the code in gup_test becomes meaningless. For sure
kernel provides debugfs stub while DEBUG_FS is disabled, but the point
here is that GUP_TEST can do nothing without DEBUG_FS.
Cc: John Hubbard <jhubb...@nvidia.com>
Cc: Ralph Campbell <rcampb...@nvidia.com>
Cc: Randy Dunlap <rdun...@infradead.org>
Suggested-by: John Garry <john.ga...@huawei.com>
Signed-off-by: Barry Song <song.bao....@hisilicon.com>
---
-v2:
add comment as a prompt to users as commented by John and Randy, thanks!
mm/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
Thanks for suffering through a lot of discussion about this!
Reviewed-by: John Hubbard <jhubb...@nvidia.com>
thanks,
--
John Hubbard
NVIDIA
diff --git a/mm/Kconfig b/mm/Kconfig
index 01b0ae0cd9d3..a7ff0d31afd5 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -836,6 +836,7 @@ config PERCPU_STATS
config GUP_TEST
bool "Enable infrastructure for get_user_pages()-related unit tests"
+ depends on DEBUG_FS
help
Provides /sys/kernel/debug/gup_test, which in turn provides a way
to make ioctl calls that can launch kernel-based unit tests for
@@ -853,6 +854,9 @@ config GUP_TEST
See tools/testing/selftests/vm/gup_test.c
+comment "GUP_TEST needs to have DEBUG_FS enabled"
+ depends on !GUP_TEST && !DEBUG_FS
+
config GUP_GET_PTE_LOW_HIGH
bool
