s390/process: avoid custom stack unwinding in get_wchan
authorVasily Gorbik <gor@linux.ibm.com>
Mon, 28 Oct 2019 14:17:42 +0000 (15:17 +0100)
committerVasily Gorbik <gor@linux.ibm.com>
Thu, 31 Oct 2019 16:20:53 +0000 (17:20 +0100)
commit6756dd9b890fe50c01a6e7546bd498d57ddb98ae
tree6ad029cd2859334de46d9616374a33d682946fa5
parentea3f6dcfa71afb51753ad3729c29570f90d6abbc
s390/process: avoid custom stack unwinding in get_wchan

Currently get_wchan uses custom stack unwinding implementation which
relies on back_chain presence. Replace it with more abstract stack
unwinding api usage.

Suggested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
arch/s390/kernel/process.c