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alistair23-linux/arch/arc/include/asm
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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
..
Kbuild KVM: export <linux/kvm_para.h> and <asm/kvm_para.h> iif KVM is supported 2019-03-28 17:27:42 +01:00
arcregs.h ARC: boot log: cut down on verbosity 2019-02-25 15:12:23 -08:00
asm-offsets.h ARC: Generic Headers 2013-01-28 12:34:21 +05:30
atomic.h ARC: atomics: unbork atomic_fetch_##op() 2018-08-31 10:14:51 -07:00
barrier.h ARC: [plat-eznps] Use dedicated SMP barriers 2016-05-09 09:32:33 +05:30
bitops.h ARC: fix __ffs return value to avoid build warnings 2019-01-17 14:38:00 -08:00
bug.h bug.h: work around GCC PR82365 in BUG() 2018-02-21 15:35:43 -08:00
cache.h ARC: define ARCH_SLAB_MINALIGN = 8 2019-02-21 11:03:20 -08:00
cacheflush.h ARC: mm: arc700: Don't assume 2 colours for aliasing VIPT dcache 2016-12-19 11:55:17 -08:00
checksum.h ipv4: Update parameters for csum_tcpudp_magic to their original types 2016-03-13 23:55:13 -04:00
cmpxchg.h ARC: [plat-eznps] Use dedicated atomic/bitops/cmpxchg 2016-05-09 09:32:33 +05:30
current.h ARC: remove extraneous __KERNEL__ guards 2014-10-13 14:46:20 +05:30
delay.h arc: fix build errors in arc/include/asm/delay.h 2018-07-30 11:48:50 -07:00
disasm.h ARC: disassembly (needed by kprobes/kgdb/unaligned-access-emul) 2013-02-15 23:16:04 +05:30
dma.h ARC: Add PCI support 2016-03-10 14:44:13 -06:00
dwarf.h ARC: dw2 unwind: add infrastructure for adding cfi pseudo ops to asm 2016-09-30 14:48:22 -07:00
elf.h ARC: fix build warning in elf.h 2016-10-19 14:38:53 -07:00
entry-arcv2.h ARCv2: support manual regfile save on interrupts 2019-02-21 11:03:18 -08:00
entry-compact.h ARC: [arcompact] entry.S: minor code movement 2018-07-09 11:25:45 -07:00
entry.h ARC: [arcompact] entry.S: minor code movement 2018-07-09 11:25:45 -07:00
exec.h ARC: Fundamental ARCH data-types/defines 2013-02-11 20:00:34 +05:30
fb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
futex.h Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
highmem.h ARC: mm: HIGHMEM: kmap API implementation 2015-10-28 19:49:04 +05:30
hugepage.h arc: use generic_pmdp_establish as pmdp_establish 2018-01-31 17:18:37 -08:00
io.h ARC: io.h: Implement reads{x}()/writes{x}() 2018-11-30 11:26:29 -08:00
irq.h ARCv2: intc: Use runtime value of irq count for setting up intc 2017-02-06 09:37:57 -08:00
irqflags-arcv2.h ARCv2: Add explcit unaligned access support (and ability to disable too) 2019-02-25 12:10:58 -08:00
irqflags-compact.h ARC: create cpu specific version of arch_cpu_idle() 2017-08-28 15:17:36 -07:00
irqflags.h ARCv2: Support for ARCv2 ISA and HS38x cores 2015-06-22 14:06:55 +05:30
kdebug.h ARC: Fundamental ARCH data-types/defines 2013-02-11 20:00:34 +05:30
kgdb.h ARC: Update order of registers in KGDB to match GDB 7.5 2014-10-13 14:46:20 +05:30
kmap_types.h ARC: mm: HIGHMEM: kmap API implementation 2015-10-28 19:49:04 +05:30
kprobes.h ARC/kprobes: Remove jprobe implementation 2018-06-21 12:33:06 +02:00
linkage.h ARC: dw2 unwind: add infrastructure for adding cfi pseudo ops to asm 2016-09-30 14:48:22 -07:00
mach_desc.h ARC: Enable machine_desc->init_per_cpu for !CONFIG_SMP 2018-06-20 16:12:06 -07:00
mmu.h ARCv2: PAE40: set MSB even if !CONFIG_ARC_HAS_PAE40 but PAE exists in SoC 2017-08-04 13:56:35 +05:30
mmu_context.h sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h> 2017-03-02 08:42:28 +01:00
mmzone.h ARC: support HIGHMEM even without PAE40 2016-05-05 16:35:46 +05:30
module.h ARC: module: Fix !CONFIG_ARC_DW2_UNWIND builds 2017-01-18 11:17:44 -08:00
page.h ARC: mm: allow mprotect to make stack mappings executable 2018-07-11 11:03:06 -07:00
pci.h PCI: remove PCI_DMA_BUS_IS_PHYS 2018-05-07 07:15:41 +02:00
perf_event.h ARC: perf: bpok condition only exists for ARCompact 2019-02-25 12:11:00 -08:00
pgalloc.h mm: treewide: remove unused address argument from pte_alloc functions 2019-01-04 13:13:47 -08:00
pgtable.h ARC fixes for 4.18-rc6 2018-07-20 11:33:22 -07:00
processor.h treewide: remove current_text_addr 2018-10-31 08:54:12 -07:00
ptrace.h ARC: [plat-eznps] handle extra aux regs #2: kernel/entry exit 2017-08-28 15:17:36 -07:00
sections.h of/fdt: consolidate built-in dtb section variables 2014-04-30 00:59:13 -05:00
segment.h ARC: uaccess friends 2013-02-11 20:00:31 +05:30
serial.h ARC: Dynamically determine BASE_BAUD from DeviceTree 2015-02-02 17:08:37 +05:30
setup.h ARCv2: IOC: Use actual memory size to setup aperture size 2017-01-18 14:52:43 -08:00
shmparam.h ARC: [mm] Aliasing VIPT dcache support 4/4 2013-05-09 22:00:57 +05:30
smp.h ARC: IRQ: Do not use hwirq as virq and vice versa 2016-11-08 12:05:10 -08:00
spinlock.h ARCv2: spinlock: remove the extra smp_mb before lock, after unlock 2019-03-08 11:17:49 -08:00
spinlock_types.h ARC: LLOCK/SCOND based rwlock 2015-08-04 09:26:33 +05:30
stacktrace.h ARC: Make arc_unwind_core accessible externally 2015-02-27 10:15:00 +05:30
string.h ARC: remove extraneous __KERNEL__ guards 2014-10-13 14:46:20 +05:30
switch_to.h ARC: [plat-eznps] handle extra aux regs #1: save/restore on context switch 2017-08-28 15:17:36 -07:00
syscall.h syscalls: Remove start and number from syscall_get_arguments() args 2019-04-05 09:26:43 -04:00
syscalls.h ARC: syscall for userspace cmpxchg assist 2016-10-24 09:24:26 -07:00
thread_info.h Construct init thread stack in the linker script rather than by union 2018-01-09 23:21:02 +00:00
timex.h ARC: Timers/counters/delay management 2013-02-11 20:00:39 +05:30
tlb-mmu1.h ARC: Disintegrate arcregs.h 2013-06-22 13:46:42 +05:30
tlb.h ARC: Disintegrate arcregs.h 2013-06-22 13:46:42 +05:30
tlbflush.h ARC: thp: unbork !CONFIG_TRANSPARENT_HUGEPAGE build 2016-03-17 15:31:45 +05:30
uaccess.h ARC: uacces: remove lp_start, lp_end from clobber list 2019-02-21 11:03:17 -08:00
unaligned.h ARC: rename kconfig option for unaligned emulation 2014-10-13 14:46:15 +05:30
unwind.h ARC: dw2 unwind: Reinstante unwinding out of modules 2015-12-17 11:10:23 +05:30