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mm: remove redundant 'default n' from Kconfig-s

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'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.
    ...

Link: http://lkml.kernel.org/r/c3385916-e4d4-37d3-b330-e6b7dff83a52@samsung.com
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2019-05-13 17:21:53 -07:00 committed by Linus Torvalds
parent 8c7829b04c
commit 62afcd1cb8
2 changed files with 0 additions and 12 deletions
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11
mm/Kconfig
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@ -161,7 +161,6 @@ config MEMORY_HOTPLUG_SPARSE
config MEMORY_HOTPLUG_DEFAULT_ONLINE config MEMORY_HOTPLUG_DEFAULT_ONLINE
bool "Online the newly added memory blocks by default" bool "Online the newly added memory blocks by default"
default n
depends on MEMORY_HOTPLUG depends on MEMORY_HOTPLUG
help help
This option sets the default policy setting for memory hotplug This option sets the default policy setting for memory hotplug
@ -439,7 +438,6 @@ config NEED_PER_CPU_KM
config CLEANCACHE config CLEANCACHE
bool "Enable cleancache driver to cache clean pages if tmem is present" bool "Enable cleancache driver to cache clean pages if tmem is present"
default n
help help
Cleancache can be thought of as a page-granularity victim cache Cleancache can be thought of as a page-granularity victim cache
for clean pages that the kernel's pageframe replacement algorithm for clean pages that the kernel's pageframe replacement algorithm
@ -463,7 +461,6 @@ config CLEANCACHE
config FRONTSWAP config FRONTSWAP
bool "Enable frontswap to cache swap pages if tmem is present" bool "Enable frontswap to cache swap pages if tmem is present"
depends on SWAP depends on SWAP
default n
help help
Frontswap is so named because it can be thought of as the opposite Frontswap is so named because it can be thought of as the opposite
of a "backing" store for a swap device. The data is stored into of a "backing" store for a swap device. The data is stored into
@ -535,7 +532,6 @@ config ZSWAP
depends on FRONTSWAP && CRYPTO=y depends on FRONTSWAP && CRYPTO=y
select CRYPTO_LZO select CRYPTO_LZO
select ZPOOL select ZPOOL
default n
help help
A lightweight compressed cache for swap pages. It takes A lightweight compressed cache for swap pages. It takes
pages that are in the process of being swapped out and attempts to pages that are in the process of being swapped out and attempts to
@ -552,14 +548,12 @@ config ZSWAP
config ZPOOL config ZPOOL
tristate "Common API for compressed memory storage" tristate "Common API for compressed memory storage"
default n
help help
Compressed memory storage API. This allows using either zbud or Compressed memory storage API. This allows using either zbud or
zsmalloc. zsmalloc.
config ZBUD config ZBUD
tristate "Low (Up to 2x) density storage for compressed pages" tristate "Low (Up to 2x) density storage for compressed pages"
default n
help help
A special purpose allocator for storing compressed pages. A special purpose allocator for storing compressed pages.
It is designed to store up to two compressed pages per physical It is designed to store up to two compressed pages per physical
@ -570,7 +564,6 @@ config ZBUD
config Z3FOLD config Z3FOLD
tristate "Up to 3x density storage for compressed pages" tristate "Up to 3x density storage for compressed pages"
depends on ZPOOL depends on ZPOOL
default n
help help
A special purpose allocator for storing compressed pages. A special purpose allocator for storing compressed pages.
It is designed to store up to three compressed pages per physical It is designed to store up to three compressed pages per physical
@ -580,7 +573,6 @@ config Z3FOLD
config ZSMALLOC config ZSMALLOC
tristate "Memory allocator for compressed pages" tristate "Memory allocator for compressed pages"
depends on MMU depends on MMU
default n
help help
zsmalloc is a slab-based memory allocator designed to store zsmalloc is a slab-based memory allocator designed to store
compressed RAM pages. zsmalloc uses virtual memory mapping compressed RAM pages. zsmalloc uses virtual memory mapping
@ -631,7 +623,6 @@ config MAX_STACK_SIZE_MB
config DEFERRED_STRUCT_PAGE_INIT config DEFERRED_STRUCT_PAGE_INIT
bool "Defer initialisation of struct pages to kthreads" bool "Defer initialisation of struct pages to kthreads"
default n
depends on SPARSEMEM depends on SPARSEMEM
depends on !NEED_PER_CPU_KM depends on !NEED_PER_CPU_KM
depends on 64BIT depends on 64BIT
@ -743,7 +734,6 @@ config ARCH_HAS_PKEYS
config PERCPU_STATS config PERCPU_STATS
bool "Collect percpu memory statistics" bool "Collect percpu memory statistics"
default n
help help
This feature collects and exposes statistics via debugfs. The This feature collects and exposes statistics via debugfs. The
information includes global and per chunk statistics, which can information includes global and per chunk statistics, which can
@ -751,7 +741,6 @@ config PERCPU_STATS
config GUP_BENCHMARK config GUP_BENCHMARK
bool "Enable infrastructure for get_user_pages_fast() benchmarking" bool "Enable infrastructure for get_user_pages_fast() benchmarking"
default n
help help
Provides /sys/kernel/debug/gup_benchmark that helps with testing Provides /sys/kernel/debug/gup_benchmark that helps with testing
performance of get_user_pages_fast(). performance of get_user_pages_fast().

1
mm/Kconfig.debug
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@ -33,7 +33,6 @@ config DEBUG_PAGEALLOC
config DEBUG_PAGEALLOC_ENABLE_DEFAULT config DEBUG_PAGEALLOC_ENABLE_DEFAULT
bool "Enable debug page memory allocations by default?" bool "Enable debug page memory allocations by default?"
default n
depends on DEBUG_PAGEALLOC depends on DEBUG_PAGEALLOC
---help--- ---help---
Enable debug page memory allocations by default? This value Enable debug page memory allocations by default? This value