Subject: [PATCH] drivers/block: remove redundant 'default n' from Kconfig-s

'default n' is the default value for any bool or tristate Kconfig
setting so there is no need to write it explicitly.

Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO
is not set' for visible symbols") the Kconfig behavior is the same
regardless of 'default n' being present or not:

...
One side effect of (and the main motivation for) this change is making
the following two definitions behave exactly the same:

config FOO
bool

config FOO
bool
default n

With this change, neither of these will generate a
'# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
That might make it clearer to people that a bare 'default n' is
redundant.
...

Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
---
drivers/block/Kconfig | 1 -
drivers/block/drbd/Kconfig | 1 -
drivers/block/zram/Kconfig | 2 --
3 files changed, 4 deletions(-)

Index: b/drivers/block/Kconfig
===================================================================
--- a/drivers/block/Kconfig 2018-09-26 15:54:31.958819766 +0200
+++ b/drivers/block/Kconfig 2018-10-09 16:35:01.327177898 +0200
@@ -461,7 +461,6 @@ config BLK_DEV_RBD
select LIBCRC32C
select CRYPTO_AES
select CRYPTO
- default n
help
Say Y here if you want include the Rados block device, which stripes
a block device over objects stored in the Ceph distributed object
Index: b/drivers/block/drbd/Kconfig
===================================================================
--- a/drivers/block/drbd/Kconfig 2018-09-03 18:11:21.973792264 +0200
+++ b/drivers/block/drbd/Kconfig 2018-10-09 16:35:10.251178122 +0200
@@ -11,7 +11,6 @@ config BLK_DEV_DRBD
depends on PROC_FS && INET
select LRU_CACHE
select LIBCRC32C
- default n
help

NOTE: In order to authenticate connections you have to select
Index: b/drivers/block/zram/Kconfig
===================================================================
--- a/drivers/block/zram/Kconfig 2018-09-03 18:11:22.185792260 +0200
+++ b/drivers/block/zram/Kconfig 2018-10-09 16:35:21.667178410 +0200
@@ -3,7 +3,6 @@ config ZRAM
tristate "Compressed RAM block device support"
depends on BLOCK && SYSFS && ZSMALLOC && CRYPTO
select CRYPTO_LZO
- default n
help
Creates virtual block devices called /dev/zramX (X = 0, 1, ...).
Pages written to these disks are compressed and stored in memory
@@ -18,7 +17,6 @@ config ZRAM
config ZRAM_WRITEBACK
bool "Write back incompressible page to backing device"
depends on ZRAM
- default n
help
With incompressible page, there is no memory saving to keep it
in memory. Instead, write it out to backing device.


2018-10-10 20:12:58

by Jens Axboe

[permalink] [raw]
Subject: Re: [PATCH] drivers/block: remove redundant 'default n' from Kconfig-s

On 10/9/18 8:41 AM, Bartlomiej Zolnierkiewicz wrote:
> 'default n' is the default value for any bool or tristate Kconfig
> setting so there is no need to write it explicitly.
>
> Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO
> is not set' for visible symbols") the Kconfig behavior is the same
> regardless of 'default n' being present or not:
>
> ...
> One side effect of (and the main motivation for) this change is making
> the following two definitions behave exactly the same:
>
> config FOO
> bool
>
> config FOO
> bool
> default n
>
> With this change, neither of these will generate a
> '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
> That might make it clearer to people that a bare 'default n' is
> redundant.
> ...

Applied, thanks.

--
Jens Axboe