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Message-Id: <1415309241-12971-1-git-send-email-aris@redhat.com> Date: Thu, 6 Nov 2014 16:27:21 -0500 From: Aristeu Rozanski <aris@...hat.com> To: linux-kernel@...r.kernel.org Cc: Aristeu Rozanski <arozansk@...hat.com>, Changli Gao <xiaosuo@...il.com>, Dave Hansen <dave@...ux.vnet.ibm.com>, David Rientjes <rientjes@...gle.com>, Eric Paris <eparis@...hat.com>, Hannes Frederic Sowa <hannes@...essinduktion.org>, Jesse Gross <jesse@...ira.com>, Jonathan Corbet <corbet@....net>, Paul Gortmaker <paul.gortmaker@...driver.com>, Pravin Shelar <pshelar@...ira.com>, Alexander Viro <viro@...iv.linux.org.uk>, Josh Triplett <josh@...htriplett.org> Subject: [PATCH] lib/flex_array: make build optional From: Aristeu Rozanski <arozansk@...hat.com> flex_array currently is built unconditionally: text data bss dec hex filename 2294 1008 1568 4870 1306 lib/flex_array.o 2294 1008 1568 4870 1306 (TOTALS) and it's used by procfs, selinux and openvswitch. This patch is useful for situations in which memory footprint is a concern and those features aren't used. Cc: Changli Gao <xiaosuo@...il.com> Cc: Dave Hansen <dave@...ux.vnet.ibm.com> Cc: David Rientjes <rientjes@...gle.com> Cc: Eric Paris <eparis@...hat.com> Cc: Hannes Frederic Sowa <hannes@...essinduktion.org> Cc: Jesse Gross <jesse@...ira.com> Cc: Jonathan Corbet <corbet@....net> Cc: Paul Gortmaker <paul.gortmaker@...driver.com> Cc: Pravin Shelar <pshelar@...ira.com> Cc: Alexander Viro <viro@...iv.linux.org.uk> Cc: Josh Triplett <josh@...htriplett.org> Signed-off-by: Aristeu Rozanski <arozansk@...hat.com> --- fs/proc/Kconfig | 1 + lib/Kconfig | 10 ++++++++++ lib/Makefile | 3 ++- net/openvswitch/Kconfig | 1 + security/selinux/Kconfig | 1 + 5 files changed, 15 insertions(+), 1 deletion(-) diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig index 2183fcf..2d624b7 100644 --- a/fs/proc/Kconfig +++ b/fs/proc/Kconfig @@ -1,6 +1,7 @@ config PROC_FS bool "/proc file system support" if EXPERT default y + select FLEX_ARRAY help This is a virtual file system providing information about the status of the system. "Virtual" means that it doesn't take up any space on diff --git a/lib/Kconfig b/lib/Kconfig index 54cf309..675920b 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -432,6 +432,16 @@ config GLOB_SELFTEST module load) by a small amount, so you're welcome to play with it, but you probably don't need it. +config FLEX_ARRAY + bool "Flexible array" + default n + help + This option enables an implementation of flexible arrays which + allows creating arrays of fixed size elements with an arbritrary + size without requiring the single allocation of a contiguous area. + + See Documentation/flexible-arrays.txt + # # Netlink attribute parsing support is select'ed if needed # diff --git a/lib/Makefile b/lib/Makefile index 7512dc9..9c12cbc 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -24,7 +24,7 @@ obj-y += lockref.o obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \ bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \ - gcd.o lcm.o list_sort.o uuid.o flex_array.o iovec.o clz_ctz.o \ + gcd.o lcm.o list_sort.o uuid.o iovec.o clz_ctz.o \ bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o \ percpu-refcount.o percpu_ida.o hash.o rhashtable.o obj-y += string_helpers.o @@ -35,6 +35,7 @@ obj-$(CONFIG_TEST_LKM) += test_module.o obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o obj-$(CONFIG_TEST_BPF) += test_bpf.o obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o +obj-$(CONFIG_FLEX_ARRAY) += flex_array.o ifeq ($(CONFIG_DEBUG_KOBJECT),y) CFLAGS_kobject.o += -DDEBUG diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig index ba3bb82..1d979ce 100644 --- a/net/openvswitch/Kconfig +++ b/net/openvswitch/Kconfig @@ -5,6 +5,7 @@ config OPENVSWITCH tristate "Open vSwitch" select LIBCRC32C + select FLEX_ARRAY ---help--- Open vSwitch is a multilayer Ethernet switch targeted at virtualized environments. In addition to supporting a variety of features diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig index bca1b74..cfcc7c1 100644 --- a/security/selinux/Kconfig +++ b/security/selinux/Kconfig @@ -2,6 +2,7 @@ config SECURITY_SELINUX bool "NSA SELinux Support" depends on SECURITY_NETWORK && AUDIT && NET && INET select NETWORK_SECMARK + select FLEX_ARRAY default n help This selects NSA Security-Enhanced Linux (SELinux). -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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