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linux-xiaomi-chiron/arch/arc/kernel
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Vineet Gupta 91e040a79d ARC: syscall for userspace cmpxchg assist 
Older ARC700 cores (ARC750 specifically) lack instructions to implement
atomic r-w-w. This is problematic for userspace libraries such as NPTL
which need atomic primitives. So enable them by providing kernel assist.
This is costly but really the only sane soluton (othern than tight
spinning using the otherwise availiable atomic exchange EX instruciton).

Good thing is there are only a few of these cores running Linux out in
the wild.

This only works on UP systems.

Reviewed-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-10-24 09:24:26 -07:00
..
.gitignore ARC: Add some .gitignore entries 2013-08-26 09:40:24 +05:30
arc_hostlink.c ARC: Hostlink Pseudo-Driver for Metaware Debugger 2013-02-15 23:16:10 +05:30
arcksyms.c ARC: export __udivdi3 for modules 2016-08-19 14:09:33 -07:00
asm-offsets.c ARCv2: [vdk] dts files and defconfig for HS38 VDK 2015-06-25 06:00:21 +05:30
ctx_sw.c ARC: [plat-eznps] Use dedicated identity auxiliary register. 2016-05-09 09:32:33 +05:30
ctx_sw_asm.S ARC: dw2 unwind: enable cfi pseudo ops in string lib 2016-09-30 14:48:22 -07:00
devtree.c ARC: RIP arc_{get|set}_core_freq() clk API 2016-05-09 09:32:31 +05:30
disasm.c ARC: rename kconfig option for unaligned emulation 2014-10-13 14:46:15 +05:30
entry-arcv2.S ARCv2: Enable LOCKDEP 2016-04-22 18:12:31 +05:30
entry-compact.S ARC: [intc-compact] simplify code for 2 priority levels 2016-05-30 22:45:04 +05:30
entry.S ARC: entry: make ret_from_system_call local label 2016-09-30 14:48:21 -07:00
fpu.c ARC: Process-creation/scheduling/idle-loop 2013-02-11 20:00:38 +05:30
head.S ARC: boot: Non Master cpus only need to call EARLY_CPU_SETUP once 2015-10-28 16:13:42 +05:30
intc-arcv2.c ARCv2: intc: Use kflag if STATUS32.IE must be reset 2016-09-30 14:48:24 -07:00
intc-compact.c ARC: [intc-compact] simplify code for 2 priority levels 2016-05-30 22:45:04 +05:30
irq.c ARC: [intc-*] Do a domain lookup in primary handler for hwirq -> linux virq 2016-05-09 09:32:30 +05:30
kgdb.c ARC: kgdb: generic kgdb_arch_pc() suffices 2014-10-22 16:14:04 -06:00
kprobes.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
Makefile ARC: RIP arc_{get|set}_core_freq() clk API 2016-05-09 09:32:31 +05:30
mcip.c ARCv2: intc: untangle SMP, MCIP and IDU 2016-10-16 15:49:07 -07:00
module.c ARC: dw2 unwind: switch to .eh_frame based unwinding 2016-09-30 14:48:20 -07:00
pcibios.c ARC: Add PCI support 2016-03-10 14:44:13 -06:00
perf_event.c arc: perf: Enable generic "cache-references" and "cache-misses" events 2016-09-30 14:48:18 -07:00
process.c ARC: syscall for userspace cmpxchg assist 2016-10-24 09:24:26 -07:00
ptrace.c ARCv2: Support for ARCv2 ISA and HS38x cores 2015-06-22 14:06:55 +05:30
reset.c arc: export symbol for pm_power_off in reset.c 2013-11-06 10:41:44 +05:30
setup.c ARC: Adjust cpuinfo for non-continuous cpu ids 2016-10-19 10:01:55 -07:00
signal.c arc: don't leak bits of kernel stack into coredump 2016-09-15 19:51:55 -04:00
smp.c ARC: Mark secondary cpu online only after all HW setup is done 2016-05-09 09:32:32 +05:30
stacktrace.c arc: unwind: warn only once if DW2_UNWIND is disabled 2016-06-28 11:11:44 +05:30
sys.c ARC: ABIv3: fork/vfork wrappers not needed in "no-legacy-syscall" ABI 2013-03-11 19:01:10 +05:30
time.c ARC/time: Convert to hotplug state machine 2016-07-15 10:41:46 +02:00
traps.c ARC: rename unhandled exception handler 2015-04-13 15:14:57 +05:30
troubleshoot.c Fix typos 2016-05-30 10:07:32 +05:30
unaligned.c ARC: change some branchs to jumps to resolve linkage errors 2015-08-20 18:53:15 +05:30
unwind.c ARC: dw2 unwind: switch to .eh_frame based unwinding 2016-09-30 14:48:20 -07:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00