paulburton

#!/bin/bash

set -eu +o pipefail

tmp="$(mktemp)"
cp .config "${tmp}"

cleanup() {
  trap - EXIT
  cp "${tmp}" .config

paulburton

[    0.000000] Linux version 4.19.0-rc1+ (pburton@pburton-laptop) (gcc version 8.1.0 (GCC)) #1 PREEMPT Fri Aug 31 13:26:40 PDT 2018
[    0.000000] CPU0 revision is: 3ee1024f (Ingenic JZRISC)
[    0.000000] FPU revision is: 00330000
[    0.000000] MIPS: machine is img,ci20
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 10000000 @ 00000000 (usable)
[    0.000000]  memory: 30000000 @ 30000000 (usable)
[    0.000000] earlycon: jz4780_uart0 at MMIO 0x10034000 (options '')
[    0.000000] bootconsole [jz4780_uart0] enabled
[    0.000000] cma: Reserved 32 MiB at 0x0e000000

paulburton

--- ci20-clk.txt	2018-07-23 10:01:50.208091103 -0700
+++ ci20-clk-pc.txt	2018-07-23 10:02:58.591727593 -0700
@@ -3,7 +3,17 @@
    clock                          count    count    count        rate   accuracy   phase
 ----------------------------------------------------------------------------------------
  rtc                                  0        0        0       32768          0 0
- ext                                 10       10        0    48000000          0 0
+    wdt                               0        0        0       32768          0 0
+ ext                                 12       12        0    48000000          0 0
+    ost                               0        0        0    48000000          0 0

paulburton

# cat /sys/kernel/debug/clk/clk_summary
                                 enable  prepare  protect
   clock                          count    count    count        rate   accuracy   phase
----------------------------------------------------------------------------------------
 rtc                                  0        0        0       32768          0 0
    wdt                               0        0        0       32768          0 0
 ext                                 12       12        0    48000000          0 0
    ost                               0        0        0    48000000          0 0
    timer7                            0        0        0    48000000          0 0
    timer6                            0        0        0    48000000          0 0

paulburton

diff --git a/arch/mips/mm/ioremap.c b/arch/mips/mm/ioremap.c
index 1986e09fb457..19ffd8370db4 100644
--- a/arch/mips/mm/ioremap.c
+++ b/arch/mips/mm/ioremap.c
@@ -9,6 +9,7 @@
 #include <linux/export.h>
 #include <asm/addrspace.h>
 #include <asm/byteorder.h>
+#include <linux/ioport.h>
 #include <linux/sched.h>

paulburton

/*
 * CPU Affinity Test
 *
 * Author: Paul Burton <paul.burton@mips.com>
 *
 * This program attempts to reproduce a bug discovered in Linux's handling of
 * CPU hotplug, which causes the sched_setaffinity() syscall to fail to migrate
 * a task away from a CPU which it is no longer eligible to run on.
 *
 * It spawns 1 thread that continuously offlines & re-onlines a bunch of CPUs,