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OpenCloudOS-Kernel/arch/arc/include/asm
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Vineet Gupta b89aa12c17 ARCv2: spinlock/rwlock: Reset retry delay when starting a new spin-wait cycle 
The previous commit for delayed retry of SCOND needs some fine tuning
for spin locks.

The backoff from delayed retry in conjunction with spin looping of lock
itself can potentially cause the delay counter to reach high values.
So to provide fairness to any lock operation, after a lock "seems"
available (i.e. just before first SCOND try0, reset the delay counter
back to starting value of 1

Essentially reset delay to 1 for a new spin-wait-loop-acquire cycle.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
 		2015-08-04 09:26:35 +05:30
..
Kbuild mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
arcregs.h ARCv2: Fix the peripheral address space detection 2015-08-03 19:34:07 +05:30
asm-offsets.h ARC: Generic Headers 2013-01-28 12:34:21 +05:30
atomic.h ARCv2: spinlock/rwlock/atomics: Delayed retry of failed SCOND with exponential backoff 2015-08-04 09:26:34 +05:30
barrier.h ARCv2: barriers 2015-06-25 06:00:17 +05:30
bitops.h ARC: Make ARC bitops "safer" (add anti-optimization) 2015-07-09 17:36:32 +05:30
bug.h ARC: BUG() dumps stack after @msg (@msg now same as in generic BUG)) 2014-10-13 14:46:18 +05:30
cache.h ARCv2: SLC: Handle explcit flush for DMA ops (w/o IO-coherency) 2015-06-25 06:00:19 +05:30
cacheflush.h ARC: fold ___flush_dcache_page into __flush_dcache_page 2015-05-19 11:27:13 +05:30
checksum.h ARC: Checksum/byteorder/swab routines 2013-02-11 20:00:34 +05:30
clk.h ARC: [DeviceTree] Convert some Kconfig items to runtime values 2013-02-15 23:15:56 +05:30
cmpxchg.h ARC: add smp barriers around atomics per Documentation/atomic_ops.txt 2015-06-25 06:00:16 +05:30
current.h ARC: remove extraneous __KERNEL__ guards 2014-10-13 14:46:20 +05:30
delay.h ARCv2: Adhere to Zero Delay loop restriction 2015-06-22 14:06:56 +05:30
disasm.h ARC: disassembly (needed by kprobes/kgdb/unaligned-access-emul) 2013-02-15 23:16:04 +05:30
dma-mapping.h Merge branch 'akpm' (patches from Andrew) 2015-07-01 17:47:51 -07:00
dma.h ARC: I/O and DMA Mappings 2013-02-15 23:15:54 +05:30
elf.h ARCv2: Support for ARCv2 ISA and HS38x cores 2015-06-22 14:06:55 +05:30
entry-arcv2.h ARCv2: Support for ARCv2 ISA and HS38x cores 2015-06-22 14:06:55 +05:30
entry-compact.h ARC: intc: split into ARCompact ISA specific, common bits 2015-06-19 18:09:40 +05:30
entry.h ARCv2: STAR 9000808988: signals involving Delay Slot 2015-06-22 14:06:55 +05:30
exec.h ARC: Fundamental ARCH data-types/defines 2013-02-11 20:00:34 +05:30
futex.h ARC: Add llock/scond to futex backend 2015-07-09 17:36:33 +05:30
io.h - Support for HS38 cores based on ARCv2 ISA 2015-07-01 09:24:26 -07:00
irq.h ARCv2: SMP: Support ARConnect (MCIP) for Inter-Core-Interrupts et al 2015-06-22 14:06:56 +05:30
irqflags-arcv2.h ARCv2: STAR 9000814690: Really Re-enable interrupts to avoid deadlocks 2015-06-22 14:06:55 +05:30
irqflags-compact.h ARCv2: Support for ARCv2 ISA and HS38x cores 2015-06-22 14:06:55 +05:30
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
kprobes.h ARC: Remove explicit passing around of ECR 2013-06-26 15:30:50 +05:30
linkage.h ARC: switch to generic ENTRY/END assembler annotations 2014-03-26 14:31:28 +05:30
mach_desc.h arc: use common of_flat_dt_match_machine 2013-10-09 20:03:55 -05:00
mcip.h ARCv2: SMP: clocksource: Enable Global Real Time counter 2015-06-22 14:06:57 +05:30
mmu.h ARCv2: MMUv4: TLB programming Model changes 2015-06-22 14:06:55 +05:30
mmu_context.h ARC: [SMP] TLB flush 2013-11-06 10:41:45 +05:30
module.h ARC: DWARF2 .debug_frame based stack unwinder 2013-02-15 23:16:03 +05:30
mutex.h ARC: SMP support 2013-02-15 23:16:02 +05:30
page.h ARC: [mm] Make stack/heap Non-executable by default 2013-06-22 19:23:20 +05:30
perf_event.h ARC: perf: support cache hit/miss ratio 2015-04-20 18:27:34 +05:30
pgalloc.h arc: handle pgtable_page_ctor() fail 2013-11-15 09:32:16 +09:00
pgtable.h ARCv2: MMUv4: TLB programming Model changes 2015-06-22 14:06:55 +05:30
processor.h ARC: mm: document system mem map clearly 2015-06-19 18:09:29 +05:30
ptrace.h ARC: make sure instruction_pointer() returns unsigned value 2015-07-13 13:33:18 +05:30
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 ARC: RIP @running_on_hw 2014-10-13 14:46:17 +05:30
shmparam.h ARC: [mm] Aliasing VIPT dcache support 4/4 2013-05-09 22:00:57 +05:30
smp.h ARC: Allow SMP kernel to build/boot on UP-only infrastructure 2014-09-27 14:49:01 +05:30
spinlock.h ARCv2: spinlock/rwlock: Reset retry delay when starting a new spin-wait cycle 2015-08-04 09:26:35 +05:30
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: Process-creation/scheduling/idle-loop 2013-02-11 20:00:38 +05:30
syscall.h ARC: stop using pt_regs->orig_r8 2013-06-22 19:23:26 +05:30
syscalls.h ARC: remove extraneous __KERNEL__ guards 2014-10-13 14:46:20 +05:30
thread_info.h ARCv2: Support for ARCv2 ISA and HS38x cores 2015-06-22 14:06:55 +05:30
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: [SMP] TLB flush 2013-11-06 10:41:45 +05:30
uaccess.h ARCv2: Adhere to Zero Delay loop restriction 2015-06-22 14:06:56 +05:30
unaligned.h ARC: rename kconfig option for unaligned emulation 2014-10-13 14:46:15 +05:30
unwind.h ARC: DWARF2 .debug_frame based stack unwinder 2013-02-15 23:16:03 +05:30