[PATCH v2 2/3] mm: remove CONFIG_ZSMALLOC_STAT

[Xueyuan Chen <xueyuan.chen21@gmail.com>]

The statistics interface now uses the debugfs API stubs directly, so
CONFIG_ZSMALLOC_STAT no longer controls any zsmalloc code.

Remove the Kconfig entry. Replace the remaining CONFIG_ZSMALLOC_STAT
settings with CONFIG_DEBUG_FS=y.

Suggested-by: Nhat Pham <nphamcs@gmail.com>
Signed-off-by: Xueyuan Chen <xueyuan.chen21@gmail.com>
---
 arch/s390/configs/debug_defconfig | 2 +-
 arch/s390/configs/defconfig       | 2 +-
 drivers/gpu/drm/ci/arm.config     | 2 +-
 drivers/gpu/drm/ci/arm64.config   | 2 +-
 drivers/gpu/drm/ci/x86_64.config  | 2 +-
 mm/Kconfig                        | 9 ---------
 6 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
index d44674b63715..83193ef8efb9 100644
--- a/arch/s390/configs/debug_defconfig
+++ b/arch/s390/configs/debug_defconfig
@@ -100,7 +100,7 @@ CONFIG_UNIXWARE_DISKLABEL=y
 CONFIG_IOSCHED_BFQ=y
 CONFIG_BINFMT_MISC=m
 CONFIG_ZSWAP=y
-CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEBUG_FS=y
 CONFIG_SLAB_BUCKETS=y
 CONFIG_SLUB_STATS=y
 # CONFIG_COMPAT_BRK is not set
diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
index e00e252d4694..694a309377d5 100644
--- a/arch/s390/configs/defconfig
+++ b/arch/s390/configs/defconfig
@@ -94,7 +94,7 @@ CONFIG_UNIXWARE_DISKLABEL=y
 CONFIG_IOSCHED_BFQ=y
 CONFIG_BINFMT_MISC=m
 CONFIG_ZSWAP=y
-CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEBUG_FS=y
 CONFIG_SLAB_BUCKETS=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_MEMORY_HOTPLUG=y
diff --git a/drivers/gpu/drm/ci/arm.config b/drivers/gpu/drm/ci/arm.config
index d7c51670da2f..fc0a8a4bfb18 100644
--- a/drivers/gpu/drm/ci/arm.config
+++ b/drivers/gpu/drm/ci/arm.config
@@ -5,7 +5,7 @@ CONFIG_CRYPTO_ZSTD=y
 CONFIG_ZRAM_MEMORY_TRACKING=y
 CONFIG_ZRAM_WRITEBACK=y
 CONFIG_ZRAM=y
-CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEBUG_FS=y
 
 # abootimg with a 'dummy' rootfs fails with root=/dev/nfs
 CONFIG_BLK_DEV_INITRD=n
diff --git a/drivers/gpu/drm/ci/arm64.config b/drivers/gpu/drm/ci/arm64.config
index c46125c1f80f..10b01b55a66d 100644
--- a/drivers/gpu/drm/ci/arm64.config
+++ b/drivers/gpu/drm/ci/arm64.config
@@ -5,7 +5,7 @@ CONFIG_CRYPTO_ZSTD=y
 CONFIG_ZRAM_MEMORY_TRACKING=y
 CONFIG_ZRAM_WRITEBACK=y
 CONFIG_ZRAM=y
-CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEBUG_FS=y
 
 # abootimg with a 'dummy' rootfs fails with root=/dev/nfs
 CONFIG_BLK_DEV_INITRD=n
diff --git a/drivers/gpu/drm/ci/x86_64.config b/drivers/gpu/drm/ci/x86_64.config
index 7ac98a78691e..8225b806dad8 100644
--- a/drivers/gpu/drm/ci/x86_64.config
+++ b/drivers/gpu/drm/ci/x86_64.config
@@ -5,7 +5,7 @@ CONFIG_CRYPTO_ZSTD=y
 CONFIG_ZRAM_MEMORY_TRACKING=y
 CONFIG_ZRAM_WRITEBACK=y
 CONFIG_ZRAM=y
-CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEBUG_FS=y
 
 CONFIG_PWM=y
 CONFIG_PM_DEVFREQ=y
diff --git a/mm/Kconfig b/mm/Kconfig
index afff1b25b543..4a77cda7f1d7 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -130,15 +130,6 @@ menu "Zsmalloc allocator options"
 
 comment "Zsmalloc is a common backend allocator for zswap & zram"
 
-config ZSMALLOC_STAT
-	bool "Export zsmalloc statistics"
-	select DEBUG_FS
-	help
-	  This option enables code in the zsmalloc to collect various
-	  statistics about what's happening in zsmalloc and exports that
-	  information to userspace via debugfs.
-	  If unsure, say N.
-
 config ZSMALLOC_CHAIN_SIZE
 	int "Maximum number of physical pages per-zspage"
 	default 8

-- 
2.47.3