linux/arch/arc/kernel/process.c, branch v4.3

ARC: add/fix some comments in code - no functional change

2015-08-20T13:35:49Z

Signed-off-by: Vineet Gupta

ARC: Fix build failures for ARCompact in linux-next after ARCv2 support

2015-06-28T15:00:13Z

Reported-by: Guenter Roeck Signed-off-by: Vineet Gupta

ARCv2: Support for ARCv2 ISA and HS38x cores

2015-06-22T08:36:55Z

The notable features are: - SMP configurations of upto 4 cores with coherency - Optional L2 Cache and IO-Coherency - Revised Interrupt Architecture (multiple priorites, reg banks, auto stack switch, auto regfile save/restore) - MMUv4 (PIPT dcache, Huge Pages) - Instructions for * 64bit load/store: LDD, STD * Hardware assisted divide/remainder: DIV, REM * Function prologue/epilogue: ENTER_S, LEAVE_S * IRQ enable/disable: CLRI, SETI * pop count: FFS, FLS * SETcc, BMSKN, XBFU... Signed-off-by: Vineet Gupta

ARC: intc: split into ARCompact ISA specific, common bits

2015-06-19T12:39:40Z

Signed-off-by: Vineet Gupta

Merge tag 'arc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

2015-04-24T14:55:54Z

Pull ARC updates from Vineet Gupta: - perf fixes/improvements - misc cleanups * tag 'arc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: perf: don't add code for impossible case ARC: perf: Rename DT binding to not confuse with power mgmt ARC: perf: add user space attribution in callchains ARC: perf: Add kernel callchain support ARC: perf: support cache hit/miss ratio ARC: perf: Add some comments/debug stuff ARC: perf: make @arc_pmu static global ARC: mem init spring cleaning - No functional changes ARC: Fix RTT boot printing ARC: fold __builtin_constant_p() into test_bit() ARC: rename unhandled exception handler ARC: cosmetic: Remove unused ECR bitfield masks ARC: Fix WRITE_BCR ARC: [nsimosci] Update defconfig arc: copy_thread(): rename 'arg' argument to 'kthread_arg'

whack-a-mole: no need to set_fs(USER_DS) in {start,flush}_thread()

2015-04-12T02:24:31Z

flush_old_exec() has already done that. Back on 2011 a bunch of instances like that had been kicked out, but that hadn't taken care of then-out-of-tree architectures, obviously, and they served as reinfection vector... Signed-off-by: Al Viro

arc: copy_thread(): rename 'arg' argument to 'kthread_arg'

2015-03-31T05:50:51Z

The 'arg' argument to copy_thread() is only ever used when forking a new kernel thread. Hence, rename it to 'kthread_arg' for clarity. Signed-off-by: Alex Dowad Signed-off-by: Vineet Gupta

ARC: Fix thread_saved_pc()

2015-02-27T05:29:34Z

The old implementation assumed that SP at the time of __switch_to() is right above pt_regs which is almost certainly not the case as there will be some stack build up between entry into kernel and leading up to __switch_to Signed-off-by: Vineet Gupta

ARC: make start_thread() out-of-line

2014-05-05T08:52:12Z

Helps move out ISA specific bits from a arch exported header Signed-off-by: Vineet Gupta

ARC: pt_regs update #5: Use real ECR for pt_regs->event vs. synth values

2013-06-26T08:34:48Z

pt_regs->event was set with artificial values to identify the low level system event (syscall trap / breakpoint trap / exceptions / interrupts) With r8 saving out of the way, the full word can be used to save real ECR (Exception Cause Register) which helps idenify the event naturally, including additional info such as cause code, param. Only for Interrupts, where ECR is not applicable, do we resort to synthetic non ECR values. SAVE_ALL_TRAP/EXCEPTIONS can now be merged as they both use ECR with different runtime values. The ptrace helpers now use the sub-fields of ECR to distinguish the events (e.g. vector 0x25 is trap, param 0 is syscall...) The following benefits will follow: (1) This centralizes the location of where ECR is saved and will allow the cleanup of task->thread.cause_code ECR placeholder which is set in non-uniform way. Then ARC VM code can safely rely on it being there for purpose of finer grained VM_EXEC dcache flush (based on exec fault: I-TLB Miss) (2) Further, ECR being passed around from low level handlers as arg can be eliminated as it is part of standard reg-file in pt_regs Signed-off-by: Vineet Gupta