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sysctl: Remove the sysctl system call

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This system call has been deprecated almost since it was introduced, and
in a survey of the linux distributions I can no longer find any of them
that enable CONFIG_SYSCTL_SYSCALL.  The only indication that I can find
that anyone might care is that a few of the defconfigs in the kernel
enable CONFIG_SYSCTL_SYSCALL.  However this appears in only 31 of 414
defconfigs in the kernel, so I suspect this symbols presence is simply
because it is harmless to include rather than because it is necessary.

As there appear to be no users of the sysctl system call, remove the
code.  As this removes one of the few uses of the internal kernel mount
of proc I hope this allows for even more simplifications of the proc
filesystem.

Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Anders Berg <anders.berg@lsi.com>
Cc: Apelete Seketeli <apelete@seketeli.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Chee Nouk Phoon <cnphoon@altera.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Christian Ruppert <christian.ruppert@abilis.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Harvey Hunt <harvey.hunt@imgtec.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hongliang Tao <taohl@lemote.com>
Cc: Hua Yan <yanh@lemote.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <blogic@openwrt.org>
Cc: Jonas Jensen <jonas.jensen@gmail.com>
Cc: Josh Boyer <jwboyer@gmail.com>
Cc: Jun Nie <jun.nie@linaro.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Kevin Wells <kevin.wells@nxp.com>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Noam Camus <noamc@ezchip.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Pierrick Hascoet <pierrick.hascoet@abilis.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Roland Stigge <stigge@antcom.de>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Scott Telford <stelford@cadence.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Tanmay Inamdar <tinamdar@apm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2019-10-01 13:01:19 -05:00
parent 54ecb8f702
commit 61a47c1ad3
34 changed files with 0 additions and 1354 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arc/configs/nps_defconfig
View File

@ -7,7 +7,6 @@ CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y
CONFIG_SYSCTL_SYSCALL=y
# CONFIG_EPOLL is not set
# CONFIG_SIGNALFD is not set
# CONFIG_TIMERFD is not set

1
arch/arc/configs/tb10x_defconfig
View File

@ -15,7 +15,6 @@ CONFIG_INITRAMFS_ROOT_UID=2100
CONFIG_INITRAMFS_ROOT_GID=501
# CONFIG_RD_GZIP is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_AIO is not set
CONFIG_EMBEDDED=y

1
arch/arm/configs/axm55xx_defconfig
View File

@ -20,7 +20,6 @@ CONFIG_NAMESPACES=y
CONFIG_SCHED_AUTOGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
# CONFIG_COMPAT_BRK is not set
CONFIG_PROFILING=y

1
arch/arm/configs/keystone_defconfig
View File

@ -11,7 +11,6 @@ CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_SCHED=y
CONFIG_BLK_CGROUP=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_ELF_CORE is not set
# CONFIG_BASE_FULL is not set

1
arch/arm/configs/lpc32xx_defconfig
View File

@ -9,7 +9,6 @@ CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
# CONFIG_ARCH_MULTI_V7 is not set

1
arch/arm/configs/moxart_defconfig
View File

@ -4,7 +4,6 @@ CONFIG_SYSVIPC=y
CONFIG_NO_HZ=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_SYSCTL_SYSCALL=y
# CONFIG_ELF_CORE is not set
# CONFIG_BASE_FULL is not set
# CONFIG_SIGNALFD is not set

1
arch/arm/configs/qcom_defconfig
View File

@ -5,7 +5,6 @@ CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_CGROUPS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_SLUB_DEBUG is not set

1
arch/arm/configs/zx_defconfig
View File

@ -11,7 +11,6 @@ CONFIG_RT_GROUP_SCHED=y
CONFIG_NAMESPACES=y
CONFIG_USER_NS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_PERF_EVENTS=y

1
arch/m68k/configs/m5475evb_defconfig
View File

@ -1,6 +1,5 @@
# CONFIG_SWAP is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_SYSCTL_SYSCALL=y
# CONFIG_KALLSYMS is not set
# CONFIG_FUTEX is not set
# CONFIG_EPOLL is not set

1
arch/mips/configs/ci20_defconfig
View File

@ -17,7 +17,6 @@ CONFIG_CGROUP_CPUACCT=y
CONFIG_NAMESPACES=y
CONFIG_USER_NS=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_VM_EVENT_COUNTERS is not set

1
arch/mips/configs/loongson3_defconfig
View File

@ -21,7 +21,6 @@ CONFIG_SCHED_AUTOGROUP=y
CONFIG_SYSFS_DEPRECATED=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_MACH_LOONGSON64=y
CONFIG_LOONGSON_MACH3X=y

1
arch/mips/configs/malta_qemu_32r6_defconfig
View File

@ -5,7 +5,6 @@ CONFIG_NO_HZ=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_MIPS_MALTA=y

1
arch/mips/configs/maltaaprp_defconfig
View File

@ -5,7 +5,6 @@ CONFIG_AUDIT=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_MIPS_MALTA=y

1
arch/mips/configs/maltasmvp_defconfig
View File

@ -5,7 +5,6 @@ CONFIG_NO_HZ=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_MIPS_MALTA=y

1
arch/mips/configs/maltasmvp_eva_defconfig
View File

@ -5,7 +5,6 @@ CONFIG_NO_HZ=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_MIPS_MALTA=y

1
arch/mips/configs/maltaup_defconfig
View File

@ -6,7 +6,6 @@ CONFIG_NO_HZ=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_MIPS_MALTA=y

1
arch/mips/configs/omega2p_defconfig
View File

@ -16,7 +16,6 @@ CONFIG_CGROUP_CPUACCT=y
CONFIG_NAMESPACES=y
CONFIG_USER_NS=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_VM_EVENT_COUNTERS is not set

1
arch/mips/configs/qi_lb60_defconfig
View File

@ -2,7 +2,6 @@
CONFIG_SYSVIPC=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_VM_EVENT_COUNTERS is not set

1
arch/mips/configs/vocore2_defconfig
View File

@ -16,7 +16,6 @@ CONFIG_CGROUP_CPUACCT=y
CONFIG_NAMESPACES=y
CONFIG_USER_NS=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_VM_EVENT_COUNTERS is not set

1
arch/nios2/configs/10m50_defconfig
View File

@ -2,7 +2,6 @@ CONFIG_SYSVIPC=y
CONFIG_NO_HZ_IDLE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_SYSCTL_SYSCALL=y
# CONFIG_ELF_CORE is not set
# CONFIG_EPOLL is not set
# CONFIG_SIGNALFD is not set

1
arch/nios2/configs/3c120_defconfig
View File

@ -2,7 +2,6 @@ CONFIG_SYSVIPC=y
CONFIG_NO_HZ_IDLE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_SYSCTL_SYSCALL=y
# CONFIG_ELF_CORE is not set
# CONFIG_EPOLL is not set
# CONFIG_SIGNALFD is not set

1
arch/parisc/configs/c8000_defconfig
View File

@ -9,7 +9,6 @@ CONFIG_IKCONFIG_PROC=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_SLAB=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y

1
arch/parisc/configs/generic-32bit_defconfig
View File

@ -8,7 +8,6 @@ CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=16
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_PERF_EVENTS=y
CONFIG_SLAB=y
CONFIG_MODULES=y

1
arch/powerpc/configs/40x/klondike_defconfig
View File

@ -4,7 +4,6 @@ CONFIG_LOG_BUF_SHIFT=14
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_MODULES=y

1
arch/sh/configs/rsk7264_defconfig
View File

@ -8,7 +8,6 @@ CONFIG_NAMESPACES=y
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_PERF_COUNTERS=y

1
arch/xtensa/configs/audio_kc705_defconfig
View File

@ -16,7 +16,6 @@ CONFIG_SCHED_AUTOGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=y

1
arch/xtensa/configs/cadence_csp_defconfig
View File

@ -21,7 +21,6 @@ CONFIG_INITRAMFS_SOURCE="$$KERNEL_INITRAMFS_SOURCE"
# CONFIG_RD_LZO is not set
# CONFIG_RD_LZ4 is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_EMBEDDED=y
CONFIG_PROFILING=y
CONFIG_MODULES=y

1
arch/xtensa/configs/generic_kc705_defconfig
View File

@ -16,7 +16,6 @@ CONFIG_SCHED_AUTOGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=y

1
arch/xtensa/configs/iss_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
# CONFIG_PCI is not set

1
arch/xtensa/configs/nommu_kc705_defconfig
View File

@ -21,7 +21,6 @@ CONFIG_BLK_DEV_INITRD=y
# CONFIG_RD_LZO is not set
# CONFIG_RD_LZ4 is not set
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_PERF_EVENTS=y
CONFIG_MODULES=y

1
arch/xtensa/configs/smp_lx200_defconfig
View File

@ -16,7 +16,6 @@ CONFIG_SCHED_AUTOGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=y

1
arch/xtensa/configs/virt_defconfig
View File

@ -15,7 +15,6 @@ CONFIG_SCHED_AUTOGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS_ALL=y
CONFIG_PERF_EVENTS=y
CONFIG_XTENSA_VARIANT_DC233C=y

17
init/Kconfig
View File

@ -1372,23 +1372,6 @@ config SYSFS_SYSCALL
If unsure say Y here.
config SYSCTL_SYSCALL
bool "Sysctl syscall support" if EXPERT
depends on PROC_SYSCTL
default n
select SYSCTL
---help---
sys_sysctl uses binary paths that have been found challenging
to properly maintain and use. The interface in /proc/sys
using paths with ascii names is now the primary path to this
information.
Almost nothing using the binary sysctl interface so if you are
trying to save some space it is probably safe to disable this,
making your kernel marginally smaller.
If unsure say N here.
config FHANDLE
bool "open by fhandle syscalls" if EXPERT
select EXPORTFS

1305
kernel/sysctl_binary.c
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