arc_unwind_core() is entry point into the actual dwarf unwinder and it gets called by various kernel APIs which provide the unwinding context (e.g. current task vs. a specific task, current pt_regs vs. some other crash context's pt_regs...)
Currently multiple const propagated clones of arc_unwind_core() are generated, which seems superfluous. The only performance critical call is for perf callgrap unwinding, which being in a different compilation unit, uses ths vanilla, non cp version anyways. So prevent the clone functions generation bloat-o-meter report | add/remove: 0/1 grow/shrink: 4/0 up/down: 40/-1152 (-1112) | function old new delta | save_stack_trace 4 16 +12 | save_stack_trace_tsk 4 14 +10 | get_wchan 4 14 +10 | show_stacktrace 40 48 +8 | arc_unwind_core.constprop 1152 - -1152 Signed-off-by: Vineet Gupta <vgu...@synopsys.com> --- arch/arc/kernel/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arc/kernel/Makefile b/arch/arc/kernel/Makefile index e7f3625a19b5..f90e5fd6d5c8 100644 --- a/arch/arc/kernel/Makefile +++ b/arch/arc/kernel/Makefile @@ -7,6 +7,7 @@ # Pass UTS_MACHINE for user_regset definition CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"' +CFLAGS_stacktrace.o += -fno-ipa-cp-clone obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o process.o devtree.o obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o clk.o -- 1.9.1 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
