Commit 62afcd1c authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Linus Torvalds
Browse files

mm: 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 f467c564 ("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: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8c7829b0

mm/Kconfig

+0 −11
Original line number Diff line number Diff line
@@ -161,7 +161,6 @@ config MEMORY_HOTPLUG_SPARSE 


config MEMORY_HOTPLUG_DEFAULT_ONLINE

        bool "Online the newly added memory blocks by default"

        default n

        depends on MEMORY_HOTPLUG

        help

	  This option sets the default policy setting for memory hotplug
@@ -439,7 +438,6 @@ config NEED_PER_CPU_KM 


config CLEANCACHE

	bool "Enable cleancache driver to cache clean pages if tmem is present"

	default n

	help

	  Cleancache can be thought of as a page-granularity victim cache

	  for clean pages that the kernel's pageframe replacement algorithm
@@ -463,7 +461,6 @@ config CLEANCACHE 
config FRONTSWAP

	bool "Enable frontswap to cache swap pages if tmem is present"

	depends on SWAP

	default n

	help

	  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
@@ -535,7 +532,6 @@ config ZSWAP 
	depends on FRONTSWAP && CRYPTO=y

	select CRYPTO_LZO

	select ZPOOL

	default n

	help

	  A lightweight compressed cache for swap pages.  It takes

	  pages that are in the process of being swapped out and attempts to
@@ -552,14 +548,12 @@ config ZSWAP 


config ZPOOL

	tristate "Common API for compressed memory storage"

	default n

	help

	  Compressed memory storage API.  This allows using either zbud or

	  zsmalloc.



config ZBUD

	tristate "Low (Up to 2x) density storage for compressed pages"

	default n

	help

	  A special purpose allocator for storing compressed pages.

	  It is designed to store up to two compressed pages per physical
@@ -570,7 +564,6 @@ config ZBUD 
config Z3FOLD

	tristate "Up to 3x density storage for compressed pages"

	depends on ZPOOL

	default n

	help

	  A special purpose allocator for storing compressed pages.

	  It is designed to store up to three compressed pages per physical
@@ -580,7 +573,6 @@ config Z3FOLD 
config ZSMALLOC

	tristate "Memory allocator for compressed pages"

	depends on MMU

	default n

	help

	  zsmalloc is a slab-based memory allocator designed to store

	  compressed RAM pages.  zsmalloc uses virtual memory mapping
@@ -631,7 +623,6 @@ config MAX_STACK_SIZE_MB 


config DEFERRED_STRUCT_PAGE_INIT

	bool "Defer initialisation of struct pages to kthreads"

	default n

	depends on SPARSEMEM

	depends on !NEED_PER_CPU_KM

	depends on 64BIT
@@ -743,7 +734,6 @@ config ARCH_HAS_PKEYS 


config PERCPU_STATS

	bool "Collect percpu memory statistics"

	default n

	help

	  This feature collects and exposes statistics via debugfs. The

	  information includes global and per chunk statistics, which can
@@ -751,7 +741,6 @@ config PERCPU_STATS 


config GUP_BENCHMARK

	bool "Enable infrastructure for get_user_pages_fast() benchmarking"

	default n

	help

	  Provides /sys/kernel/debug/gup_benchmark that helps with testing

	  performance of get_user_pages_fast().

mm/Kconfig.debug

+0 −1
Original line number Diff line number Diff line
@@ -33,7 +33,6 @@ config DEBUG_PAGEALLOC 


config DEBUG_PAGEALLOC_ENABLE_DEFAULT

	bool "Enable debug page memory allocations by default?"

	default n

	depends on DEBUG_PAGEALLOC

	---help---

	  Enable debug page memory allocations by default? This value

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