user/sven/linux.git/arch/arc/kernel/stacktrace.c, branch v4.20

arc: do not use __print_symbol()

2017-12-20T20:41:43Z

__print_symbol() uses extra stack space to sprintf() symbol information and then to feed that buffer to printk() char buffer[KSYM_SYMBOL_LEN]; sprint_symbol(buffer, address); printk(fmt, buffer); Replace __print_symbol() with a direct printk("%pS") call. Signed-off-by: Sergey Senozhatsky Signed-off-by: Vineet Gupta

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:34Z

We are going to split out of , which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder file that just maps to to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

arc: unwind: warn only once if DW2_UNWIND is disabled

2016-06-28T05:41:44Z

If CONFIG_ARC_DW2_UNWIND is disabled every time arc_unwind_core() gets called following message gets printed in debug console: ----------------->8--------------- CONFIG_ARC_DW2_UNWIND needs to be enabled ----------------->8--------------- That message makes sense if user indeed wants to see a backtrace or get nice function call-graphs in perf but what if user disabled unwinder for the purpose? Why pollute his debug console? So instead we'll warn user about possibly missing feature once and let him decide if that was what he or she really wanted. Signed-off-by: Alexey Brodkin Cc: stable@vger.kernel.org Signed-off-by: Vineet Gupta

ARC: Fix misspellings in comments.

2016-03-11T09:29:53Z

Signed-off-by: Adam Buchbinder Signed-off-by: Vineet Gupta

ARC: stack unwinder to bail if PC is not kernel mode

2015-06-19T12:39:29Z

Currently, it doesn't invoke the callback but continues to unwind Also while at it - simplify the code a bit Signed-off-by: Vineet Gupta

ARC: Fix KSTK_ESP()

2015-02-27T05:18:23Z

/proc//maps currently don't annotate stack vma with "[stack]" This is because KSTK_ESP ie expected to return usermode SP of tsk while currently it returns the kernel mode SP of a sleeping tsk. While the fix is trivial, we also need to adjust the ARC kernel stack unwinder to not use KSTK_SP and friends any more. Cc: Reported-and-suggested-by: Alexey Brodkin Signed-off-by: Vineet Gupta

ARC: Make arc_unwind_core accessible externally

2015-02-27T04:45:00Z

The arc unwinder can also be used for perf callchains. Signed-off-by: Mischa Jonker Signed-off-by: Vineet Gupta

arc: export symbol for save_stack_trace() in stacktrace.c

2013-11-06T05:11:44Z

Need export its symbol just like other architectures done, or can not pass compiling with allmodconfig, the related error: MODPOST 2994 modules ERROR: "save_stack_trace" [kernel/backtracetest.ko] undefined! ERROR: "save_stack_trace" [drivers/md/persistent-data/dm-persistent-data.ko] undefined! Signed-off-by: Chen Gang Signed-off-by: Vineet Gupta

ARC: Add support for irqflags tracing and lockdep

2013-11-06T05:11:40Z

Lockdep required a small fix to stacktrace API which was incorrectly unwindign out of __switch_to for the current call frame. Signed-off-by: Vineet Gupta

ARC: pt_regs update #3: Remove unused gutter at start of callee_regs

2013-06-22T13:53:22Z

This is trickier than prev two: * context switching code saves kernel mode callee regs in the format of struct callee_regs thus needs adjustment. This also reduces the height of topmost kernel stack frame by 1 word. * Since kernel stack unwinder is sensitive to height of topmost kernel stack frame, that needs a word of adjustment too. ptrace needs a bit of updating since pt_regs now diverges from user_regs_struct. Signed-off-by: Vineet Gupta