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Christophe Leroy 8bc125f596 powerpc/xmon: Change printk() to pr_cont() 
commit 7c6c86b36a36dd4a13d30bba07718e767aa2e7a1 upstream.

Since some time now, printk() adds carriage return, leading to
unusable xmon output if there is no udbg backend available:

  [   54.288722] sysrq: Entering xmon
  [   54.292209] Vector: 0  at [cace3d2c]
  [   54.292274]     pc:
  [   54.292331] c0023650
  [   54.292468] : xmon+0x28/0x58
  [   54.292519]
  [   54.292574]     lr:
  [   54.292630] c0023724
  [   54.292749] : sysrq_handle_xmon+0xa4/0xfc
  [   54.292801]
  [   54.292867]     sp: cace3de8
  [   54.292931]    msr: 9032
  [   54.292999]   current = 0xc28d0000
  [   54.293072]     pid   = 377, comm = sh
  [   54.293157] Linux version 5.10.0-rc6-s3k-dev-01364-gedf13f0ccd76-dirty (root@po17688vm.idsi0.si.c-s.fr) (powerpc64-linux-gcc (GCC) 10.1.0, GNU ld (GNU Binutils) 2.34) #4211 PREEMPT Fri Dec 4 09:32:11 UTC 2020
  [   54.293287] enter ? for help
  [   54.293470] [cace3de8]
  [   54.293532] c0023724
  [   54.293654]  sysrq_handle_xmon+0xa4/0xfc
  [   54.293711]  (unreliable)
  ...
  [   54.296002]
  [   54.296159] --- Exception: c01 (System Call) at
  [   54.296217] 0fd4e784
  [   54.296303]
  [   54.296375] SP (7fca6ff0) is in userspace
  [   54.296431] mon>
  [   54.296484]  <no input ...>

Use pr_cont() instead.

Fixes: 4bcc595ccd ("printk: reinstate KERN_CONT for printing continuation lines")
Cc: stable@vger.kernel.org # v4.9+
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Mention that it only happens when udbg is not available]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c8a6ec704416ecd5ff2bd26213c9bc026bdd19de.1607077340.git.christophe.leroy@csgroup.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-30 11:54:16 +01:00
..
alpha sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
arc asm-generic: add correct MAX_POSSIBLE_PHYSMEM_BITS setting 2020-11-27 15:00:35 -08:00
arm ARM: tegra: Populate OPP table for Tegra20 Ventana 2020-12-30 11:54:15 +01:00
arm64 KVM: arm64: Introduce handling of AArch32 TTBCR2 traps 2020-12-30 11:54:14 +01:00
c6x arch-cleanup-2020-10-22 2020-10-23 10:06:38 -07:00
csky Yet two more places which invoke tracing from RCU disabled regions in the 2020-11-29 11:19:26 -08:00
h8300 sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
hexagon sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
ia64 Yet two more places which invoke tracing from RCU disabled regions in the 2020-11-29 11:19:26 -08:00
m68k m68k: Fix WARNING splat in pmac_zilog driver 2020-12-30 11:54:11 +01:00
microblaze sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
mips MIPS: Don't round up kernel sections size for memblock_add() 2020-12-30 11:53:34 +01:00
nds32 arch-cleanup-2020-10-22 2020-10-23 10:06:38 -07:00
nios2 sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
openrisc sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
parisc sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
powerpc powerpc/xmon: Change printk() to pr_cont() 2020-12-30 11:54:16 +01:00
riscv RISC-V: Fix usage of memblock_enforce_memory_limit 2020-12-30 11:54:13 +01:00
s390 s390/idle: fix accounting with machine checks 2020-12-30 11:54:08 +01:00
sh sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
sparc sparc: fix handling of page table constructor failure 2020-12-30 11:53:55 +01:00
um um: chan_xterm: Fix fd leak 2020-12-30 11:53:53 +01:00
x86 KVM: SVM: Remove the call to sev_platform_status() during setup 2020-12-30 11:54:14 +01:00
xtensa xtensa: uaccess: Add missing __user to strncpy_from_user() prototype 2020-11-17 05:09:28 -08:00
.gitignore
Kconfig kbuild: Hoist '--orphan-handling' into Kconfig 2020-12-01 22:45:36 +09:00