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Steven Rostedt (Red Hat) b35f549df1 syscalls: Remove start and number from syscall_get_arguments() args 
At Linux Plumbers, Andy Lutomirski approached me and pointed out that the
function call syscall_get_arguments() implemented in x86 was horribly
written and not optimized for the standard case of passing in 0 and 6 for
the starting index and the number of system calls to get. When looking at
all the users of this function, I discovered that all instances pass in only
0 and 6 for these arguments. Instead of having this function handle
different cases that are never used, simply rewrite it to return the first 6
arguments of a system call.

This should help out the performance of tracing system calls by ptrace,
ftrace and perf.

Link: http://lkml.kernel.org/r/20161107213233.754809394@goodmis.org

Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Dave Martin <dave.martin@arm.com>
Cc: "Dmitry V. Levin" <ldv@altlinux.org>
Cc: x86@kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Acked-by: Paul Burton <paul.burton@mips.com> # MIPS parts
Acked-by: Max Filippov <jcmvbkbc@gmail.com> # For xtensa changes
Acked-by: Will Deacon <will.deacon@arm.com> # For the arm64 bits
Reviewed-by: Thomas Gleixner <tglx@linutronix.de> # for x86
Reviewed-by: Dmitry V. Levin <ldv@altlinux.org>
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
 		2019-04-05 09:26:43 -04:00
..
alchemy A few early MIPS fixes for 4.21: 2019-01-05 12:48:25 -08:00
ar7 net: phy: fixed-phy: Drop GPIO from fixed_phy_add() 2019-02-04 18:33:36 -08:00
ath25 PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
ath79 MIPS: ath79: drop !OF clock code 2019-01-22 11:17:22 -08:00
bcm47xx A small batch of MIPS fixes for 5.1: 2019-03-19 10:50:15 -07:00
bcm63xx MIPS: BCM63XX: provide DMA masks for ethernet devices 2019-02-25 12:56:39 -08:00
bmips mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
boot Kbuild updates for v5.1 2019-03-10 17:48:21 -07:00
cavium-octeon treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
cobalt
…
configs fscrypt updates for v5.1 2019-03-09 10:54:24 -08:00
crypto MIPS: crypto: Add crc32 and crc32c hw accelerated module 2018-02-19 20:50:36 +00:00
dec mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
emma mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
fw mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
generic MIPS: mscc: add PCB120 to the ocelot fitImage 2018-10-09 10:38:29 -07:00
include syscalls: Remove start and number from syscall_get_arguments() args 2019-04-05 09:26:43 -04:00
jazz MIPS: jazz: fix 64bit build 2019-01-09 13:14:34 -08:00
jz4740 MIPS: ingenic: Add support for appended devicetree 2019-02-21 15:55:41 -08:00
kernel syscalls: Remove start and number from syscall_get_arguments() args 2019-04-05 09:26:43 -04:00
kvm MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
lantiq Here's the main MIPS pull request for v5.1: 2019-03-05 11:28:25 -08:00
lasat mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
lib MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
loongson32 MIPS: Loongson32: Remove DMA & NAND devices from ls1b/board.c 2019-02-04 14:44:33 -08:00
loongson64 A small batch of MIPS fixes for 5.1: 2019-03-19 10:50:15 -07:00
math-emu mips: math-emu: no need to check return value of debugfs_create functions 2019-01-22 11:17:20 -08:00
mm treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
mti-malta MIPS: malta: Use img-ascii-lcd driver for LCD display 2018-11-20 21:05:39 -08:00
net MIPS: eBPF: Fix icache flush end address 2019-03-02 00:04:15 +01:00
netlogic mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
oprofile Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
paravirt mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pci Here's the main MIPS pull request for v5.1: 2019-03-05 11:28:25 -08:00
pic32 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pistachio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmcs-msp71xx PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
pnx833x mtd: rawnand: Move platform_nand_xxx definitions out of rawnand.h 2018-10-03 11:12:25 +02:00
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ralink mips: ralink: no need to check return value of debugfs_create functions 2019-01-22 11:17:20 -08:00
rb532 ata: rb532_cf: Convert to use GPIO descriptors 2018-12-04 17:15:25 -07:00
sgi-ip22 MIPS: Remove no-op/identity casts 2018-08-31 11:49:20 -07:00
sgi-ip27 MIPS: SGI-IP27: rework HUB interrupts 2019-02-19 12:46:03 -08:00
sgi-ip32 MIPS: IP32: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
sibyte Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
sni MIPS: sni: Remove the read_persistent_clock() 2018-05-14 23:58:25 +01:00
tools MIPS: Use a custom elf-entry program to find kernel entry point 2018-08-30 09:39:22 -07:00
txx9 PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
vdso MIPS: VDSO: Include $(ccflags-vdso) in o32,n32 .lds builds 2019-01-29 11:50:58 -08:00
vr41xx PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
Kbuild MIPS: Disable Werror when W= is set 2017-04-10 11:56:07 +02:00
Kbuild.platforms MIPS: Xilfpga: Switch to using generic defconfigs 2017-11-08 22:54:14 +00:00
Kconfig DMA mapping updates for 5.1 2019-03-10 11:54:48 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile MIPS: Add GINVT instruction helpers 2019-02-04 10:56:35 -08:00
Makefile.postlink License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00