Zong Li 9d05c18e8d clocksource: riscv: add notrace to riscv_sched_clock ... When enabling ftrace graph tracer, it gets the tracing clock in ftrace_push_return_trace(). Eventually, it invokes riscv_sched_clock() to get the clock value. If riscv_sched_clock() isn't marked with 'notrace', it will call ftrace_push_return_trace() and cause infinite loop. The result of failure as follow: command: echo function_graph >current_tracer [ 46.176787] Unable to handle kernel paging request at virtual address ffffffe04fb38c48 [ 46.177309] Oops [#1] [ 46.177478] Modules linked in: [ 46.177770] CPU: 0 PID: 256 Comm: $d Not tainted 5.5.0-rc1 #47 [ 46.177981] epc: ffffffe00035e59a ra : ffffffe00035e57e sp : ffffffe03a7569b0 [ 46.178216] gp : ffffffe000d29b90 tp : ffffffe03a756180 t0 : ffffffe03a756968 [ 46.178430] t1 : ffffffe00087f408 t2 : ffffffe03a7569a0 s0 : ffffffe03a7569f0 [ 46.178643] s1 : ffffffe00087f408 a0 : 0000000ac054cda4 a1 : 000000000087f411 [ 46.178856] a2 : 0000000ac054cda4 a3 : 0000000000373ca0 a4 : ffffffe04fb38c48 [ 46.179099] a5 : 00000000153e22a8 a6 : 00000000005522ff a7 : 0000000000000005 [ 46.179338] s2 : ffffffe03a756a90 s3 : ffffffe00032811c s4 : ffffffe03a756a58 [ 46.179570] s5 : ffffffe000d29fe0 s6 : 0000000000000001 s7 : 0000000000000003 [ 46.179809] s8 : 0000000000000003 s9 : 0000000000000002 s10: 0000000000000004 [ 46.180053] s11: 0000000000000000 t3 : 0000003fc815749c t4 : 00000000000efc90 [ 46.180293] t5 : ffffffe000d29658 t6 : 0000000000040000 [ 46.180482] status: 0000000000000100 badaddr: ffffffe04fb38c48 cause: 000000000000000f Signed-off-by: Zong Li <zong.li@sifive.com> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> [paul.walmsley@sifive.com: cleaned up patch description] Fixes: 92e0d143fd ("clocksource/drivers/riscv_timer: Provide the sched_clock") Cc: stable@vger.kernel.org Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>		2020-01-04 21:48:48 -08:00
..
acpi_pm.c
arc_timer.c
arm_arch_timer.c
arm_global_timer.c
armv7m_systick.c
asm9260_timer.c	clocksource/drivers/asm9260: Add a check for of_clk_get	2019-11-04 10:40:10 +01:00
bcm2835_timer.c
bcm_kona_timer.c
clksrc_st_lpc.c
clksrc-dbx500-prcmu.c
clps711x-timer.c
dummy_timer.c
dw_apb_timer_of.c
dw_apb_timer.c
em_sti.c
exynos_mct.c
h8300_timer8.c
h8300_timer16.c
h8300_tpu.c
hyperv_timer.c	x86/hyperv: Initialize clockevents earlier in CPU onlining	2019-11-15 10:33:49 +01:00
i8253.c
ingenic-timer.c
jcore-pit.c
Kconfig	clocksource/drivers/renesas-ostm: Convert to timer_of	2019-11-04 10:38:46 +01:00
Makefile
mips-gic-timer.c
mmio.c
mps2-timer.c
mxs_timer.c
nomadik-mtu.c
numachip.c
renesas-ostm.c	clocksource/drivers/renesas-ostm: Use unique device name instead of ostm	2019-11-04 10:38:46 +01:00
samsung_pwm_timer.c	clocksource: samsung_pwm_timer: Use pr_warn instead of pr_warning	2019-10-18 15:00:20 +02:00
scx200_hrt.c
sh_cmt.c	sh: add the sh_ prefix to early platform symbols	2019-10-07 13:50:48 +02:00
sh_mtu2.c	Driver core patches for 5.5-rc1	2019-11-27 11:06:20 -08:00
sh_tmu.c	sh: add the sh_ prefix to early platform symbols	2019-10-07 13:50:48 +02:00
timer-armada-370-xp.c
timer-atcpit100.c
timer-atlas7.c
timer-atmel-pit.c
timer-atmel-st.c
timer-atmel-tcb.c
timer-cadence-ttc.c
timer-cs5535.c
timer-davinci.c
timer-digicolor.c
timer-efm32.c
timer-fsl-ftm.c
timer-fttmr010.c
timer-gx6605s.c
timer-imx-gpt.c
timer-imx-sysctr.c
timer-imx-tpm.c
timer-integrator-ap.c
timer-ixp4xx.c
timer-keystone.c
timer-lpc32xx.c
timer-mediatek.c	clocksource/drivers/mediatek: Fix error handling	2019-10-16 17:04:50 +02:00
timer-meson6.c
timer-milbeaut.c
timer-mp-csky.c
timer-npcm7xx.c
timer-nps.c
timer-of.c	- Some cleanups for the timer-of, use %p0F and the unique device name	2019-11-04 18:49:13 +01:00
timer-of.h
timer-orion.c
timer-owl.c
timer-oxnas-rps.c
timer-pistachio.c
timer-prima2.c
timer-probe.c
timer-pxa.c
timer-qcom.c
timer-rda.c
timer-riscv.c	clocksource: riscv: add notrace to riscv_sched_clock	2020-01-04 21:48:48 -08:00
timer-rockchip.c
timer-sp804.c
timer-sp.h
timer-sprd.c
timer-stm32.c
timer-sun4i.c
timer-sun5i.c
timer-tango-xtal.c
timer-tegra.c
timer-ti-32k.c
timer-ti-dm.c
timer-u300.c
timer-versatile.c
timer-vf-pit.c
timer-vt8500.c
timer-zevio.c