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Christophe Leroy 15c9e56b41 powerpc/xmon: Change printk() to pr_cont()
commit 7c6c86b36a 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 11:51:39 +01:00
..
alpha alpha: fix annotation of io{read,write}{16,32}be() 2020-08-26 10:40:58 +02:00
arc ARC: stack unwinding: don't assume non-current task is sleeping 2020-12-16 10:56:55 +01:00
arm ARM: dts: at91: sama5d2: fix CAN message ram offset and size 2020-12-30 11:51:38 +01:00
arm64 KVM: arm64: Introduce handling of AArch32 TTBCR2 traps 2020-12-30 11:51:38 +01:00
c6x mm: consolidate pgtable_cache_init() and pgd_cache_init() 2019-09-24 15:54:09 -07:00
csky csky: Fixup abiv2 syscall_trace break a4 & a5 2020-06-17 16:40:21 +02:00
h8300 mm: consolidate pgtable_cache_init() and pgd_cache_init() 2019-09-24 15:54:09 -07:00
hexagon hexagon: define ioremap_uc 2020-05-10 10:31:31 +02:00
ia64 ia64: fix build error with !COREDUMP 2020-11-05 11:43:33 +01:00
m68k m68k: q40: Fix info-leak in rtc_ioctl 2020-10-01 13:17:12 +02:00
microblaze microblaze: Prevent the overflow of the start 2020-02-24 08:37:02 +01:00
mips MIPS: Don't round up kernel sections size for memblock_add() 2020-12-30 11:51:18 +01:00
nds32 asm-generic/nds32: don't redefine cacheflush primitives 2020-01-17 19:48:43 +01:00
nios2 nios2 update for v5.4-rc1 2019-09-27 13:02:19 -07:00
openrisc openrisc: Fix issue with get_user for 64-bit values 2020-11-01 12:01:06 +01:00
parisc kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables 2020-09-03 11:27:10 +02:00
powerpc powerpc/xmon: Change printk() to pr_cont() 2020-12-30 11:51:39 +01:00
riscv arch: pgtable: define MAX_POSSIBLE_PHYSMEM_BITS where needed 2020-12-02 08:49:50 +01:00
s390 s390/kexec_file: fix diag308 subcode when loading crash kernel 2020-12-30 11:51:34 +01:00
sh sh: landisk: Add missing initialization of sh_io_port_base 2020-08-21 13:05:38 +02:00
sparc sparc: fix handling of page table constructor failure 2020-12-30 11:51:26 +01:00
um um: chan_xterm: Fix fd leak 2020-12-30 11:51:26 +01:00
unicore32 mm: treewide: clarify pgtable_page_{ctor,dtor}() naming 2019-09-26 10:10:44 -07:00
x86 perf/x86/intel: Fix rtm_abort_event encoding on Ice Lake 2020-12-30 11:51:35 +01:00
xtensa xtensa: uaccess: Add missing __user to strncpy_from_user() prototype 2020-12-02 08:49:49 +01:00
.gitignore
Kconfig mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race 2020-11-05 11:43:13 +01:00