Vineet Gupta b060b7d0c1 ARC: __switch_to: asm with dwarf ops (vs. inline asm) ... __switch_to() is final step of context switch, swapping kernel modes stack (and callee regs) of outgoing task with next task. It is also the starting point of stack unwinging of a sleeping task and captures SP, FP, BLINK and the corresponding dwarf info. Back when dinosaurs still roamed around, ARC gas didn't support CFI pseudo ops and gcc was responsible for generating dwarf info. Thus it had to be written in "C" with inline asm to do the hand crafting of stack. The function prologue (and crucial saving of blink etc) was still gcc generated but not visible in code. Likewise dwarf info was missing. Now with modern tools, we can make things more obvious by writing the code in asm and adding approproate dwarf cfi pseudo ops. This is mostly non functional change, except for slight chnages to asm - ARCompact doesn't support MOV_S fp, sp, so we use MOV Signed-off-by: Vineet Gupta <vgupta@kernel.org>		2023-08-17 20:31:59 -07:00
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asm	ARC: __switch_to: asm with dwarf ops (vs. inline asm)	2023-08-17 20:31:59 -07:00
uapi/asm	ARC: bpf: define uapi for BPF_PROG_TYPE_PERF_EVENT program type	2022-04-26 09:35:28 -07:00