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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
..
dec
emma
fw
ip32
lasat
mach-ar7
mach-ath25
mach-ath79 Here's the main MIPS pull request for v5.1: 2019-03-05 11:28:25 -08:00
mach-au1x00 MIPS: Alchemy: update cpu-feature-overrides 2018-12-23 07:58:26 -08:00
mach-bcm47xx
mach-bcm63xx MIPS: BCM63XX: drop unused and broken DSP platform device 2018-12-31 07:12:35 -08:00
mach-bmips
mach-cavium-octeon
mach-cobalt
mach-db1x00
mach-dec
mach-emma2rh
mach-generic MIPS: Only include mmzone.h when CONFIG_NEED_MULTIPLE_NODES=y 2018-11-21 19:54:59 -08:00
mach-ip22
mach-ip27 MIPS: SGI-IP27: rework HUB interrupts 2019-02-19 12:46:03 -08:00
mach-ip28
mach-ip32
mach-jazz
mach-jz4740 mmc: jz4740: Use GPIO descriptor for power 2018-12-17 08:26:24 +01:00
mach-lantiq MIPS: lantiq: Use CP0_LEGACY_COMPARE_IRQ 2019-01-07 13:38:35 -08:00
mach-lasat
mach-loongson32 MIPS: Loongson32: Remove unused platform devices 2019-01-22 11:17:21 -08:00
mach-loongson64 Kconfig file consolidation for v4.21 2018-12-29 13:40:29 -08:00
mach-malta
mach-netlogic
mach-paravirt
mach-pic32
mach-pistachio
mach-pmcs-msp71xx
mach-pnx833x
mach-ralink
mach-rc32434 ata: rb532_cf: Convert to use GPIO descriptors 2018-12-04 17:15:25 -07:00
mach-rm
mach-sibyte
mach-tx39xx
mach-tx49xx
mach-vr41xx
mach-xilfpga
mips-boards
netlogic
octeon MIPS: OCTEON: program rx/tx-delay always from DT 2019-02-07 15:22:38 -08:00
pci MIPS: SGI-IP27: rework HUB interrupts 2019-02-19 12:46:03 -08:00
sgi
sibyte
sn MIPS: SGI-IP27: clean up bridge access and header files 2019-02-19 12:46:02 -08:00
txx9
vr41xx
xtalk
abi.h
addrspace.h
amon.h
arch_hweight.h
asm-eva.h
asm-offsets.h
asm-prototypes.h
asm.h
asmmacro-32.h
asmmacro-64.h
asmmacro.h
atomic.h MIPS: Loongson: Introduce and use loongson_llsc_mb() 2019-02-04 10:53:34 -08:00
barrier.h Here's the main MIPS pull request for v5.1: 2019-03-05 11:28:25 -08:00
bcache.h
bitops.h MIPS: Loongson: Introduce and use loongson_llsc_mb() 2019-02-04 10:53:34 -08:00
bitrev.h
bmips-spaces.h
bmips.h
bootinfo.h
branch.h
break.h
bug.h
bugs.h
cache.h
cacheflush.h MIPS: Delete unused flush_cache_sigtramp() 2019-02-07 12:59:45 -08:00
cacheops.h
cdmm.h
cevt-r4k.h
checksum.h Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
clock.h
clocksource.h
cmp.h
cmpxchg.h MIPS: Fix set_pte() for Netlogic XLR using cmpxchg64() 2019-02-06 14:59:24 -08:00
compat-signal.h
compat.h
compiler.h MIPS: Simplify GCC_OFF_SMALL_ASM definition 2018-11-07 16:26:42 -08:00
cop2.h
cpu-features.h MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
cpu-info.h MIPS: Expand MIPS32 ASIDs to 64 bits 2018-12-05 14:46:44 -08:00
cpu-type.h
cpu.h MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
cpufeature.h
debug.h
delay.h
div64.h
dma-coherence.h
dma-direct.h
dma-mapping.h dma-mapping: add a kconfig symbol for arch_setup_dma_ops availability 2019-02-13 19:12:33 +01:00
dma.h
ds1287.h
dsemul.h MIPS: Don't compile math-emu when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:18 -08:00
dsp.h
edac.h MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
elf.h MIPS: Avoid FP ELF checks when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:18 -08:00
errno.h
eva.h
exec.h
extable.h
fb.h
fixmap.h
floppy.h
fpregdef.h
fpu.h MIPS: Stub asm/fpu.h functions 2018-11-09 10:23:15 -08:00
fpu_emulator.h MIPS: Simplify FP context initialization 2018-11-09 10:23:13 -08:00
ftrace.h
futex.h MIPS: Loongson: Introduce and use loongson_llsc_mb() 2019-02-04 10:53:34 -08:00
ginvt.h MIPS: Add GINVT instruction helpers 2019-02-04 10:56:35 -08:00
gio_device.h
gt64120.h
hardirq.h
hazards.h MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
highmem.h
hpet.h
hugetlb.h
hw_irq.h
i8259.h
ide.h
idle.h
inst.h
io.h MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
irq.h
irq_cpu.h
irq_gt641xx.h
irq_regs.h
irqflags.h MIPS: Loongson32: workaround di issue 2019-01-22 17:32:01 -08:00
isa-rev.h
isadep.h
jazz.h
jazzdma.h mips/jazz: remove the mapping_error dma_map_ops method 2018-12-06 06:56:38 -08:00
jump_label.h MIPS: Fix kernel crash for R6 in jump label branch function 2019-03-11 11:11:11 -07:00
Kbuild MIPS: remove meaningless generic-(CONFIG_GENERIC_CSUM) += checksum.h 2019-01-22 17:35:57 -08:00
kdebug.h
kexec.h
kgdb.h
kmap_types.h
kprobes.h
kvm_host.h KVM: Call kvm_arch_memslots_updated() before updating memslots 2019-02-20 22:48:32 +01:00
kvm_para.h
linkage.h
llsc.h
local.h MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
m48t37.h
maar.h
machine.h
mc146818-time.h
mc146818rtc.h
mips-cm.h
mips-cpc.h
mips-cps.h
mips-gic.h
mips-r2-to-r6-emul.h
mips_machine.h
mips_mt.h
mipsmtregs.h MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
mipsprom.h
mipsregs.h MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
mmu.h MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
mmu_context.h MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
mmzone.h MIPS: Only include mmzone.h when CONFIG_NEED_MULTIPLE_NODES=y 2018-11-21 19:54:59 -08:00
module.h
msa.h
msc01_ic.h
nile4.h
paccess.h
page.h MIPS: Enable IOREMAP_PROT config option for MIPS cpus 2018-11-05 10:15:28 -08:00
pci.h
perf_event.h
pgalloc.h mm: treewide: remove unused address argument from pte_alloc functions 2019-01-04 13:13:47 -08:00
pgtable-32.h
pgtable-64.h MIPS: Ensure pmd_present() returns false after pmd_mknotpresent() 2018-11-20 21:05:39 -08:00
pgtable-bits.h
pgtable.h MIPS: Fix set_pte() for Netlogic XLR using cmpxchg64() 2019-02-06 14:59:24 -08:00
pm-cps.h
pm.h
pmon.h
prefetch.h
processor.h MIPS: Remove struct task_struct fpu state when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:19 -08:00
prom.h
ptrace.h
r4k-timer.h
r4kcache.h MIPS: c-r4k: Add r4k_blast_scache_node for Loongson-3 2018-11-20 21:04:17 -08:00
reboot.h
reg.h
regdef.h
rtlx.h
seccomp.h
serial.h
setup.h
sgialib.h
sgiarcs.h
shmparam.h
sigcontext.h
signal.h
sim.h
smp-cps.h
smp-ops.h MIPS: SGI-IP27: do boot CPU init later 2019-02-19 12:46:03 -08:00
smp.h
sni.h
socket.h
sparsemem.h
spinlock.h
spinlock_types.h
spram.h
stackframe.h MIPS: Avoid using .set mips0 to restore ISA 2018-11-09 10:23:19 -08:00
stackprotector.h
stacktrace.h
string.h
switch_to.h MIPS: Avoid FCSR sanitization when CONFIG_MIPS_FP_SUPPORT=n 2018-11-09 10:23:18 -08:00
syscall.h syscalls: Remove start and number from syscall_get_arguments() args 2019-04-05 09:26:43 -04:00
termios.h Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
thread_info.h
time.h
timex.h
tlb.h
tlbdebug.h
tlbex.h
tlbflush.h MIPS: mm: Remove local_flush_tlb_mm() 2019-02-04 10:56:24 -08:00
tlbmisc.h
topology.h
traps.h
txx9irq.h
txx9pio.h
txx9tmr.h
types.h
uaccess.h get rid of legacy 'get_ds()' function 2019-03-04 10:50:14 -08:00
uasm.h mips: bpf: implement jitting of BPF_ALU | BPF_ARSH | BPF_X 2018-12-07 13:30:48 -08:00
unistd.h y2038: rename old time and utime syscalls 2019-02-07 00:13:28 +01:00
uprobes.h
vdso.h
vga.h
vpe.h
war.h
watch.h
wbflush.h
yamon-dt.h