s390: have unique symbol for __switch_to address
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Thu, 30 Jun 2016 10:40:25 +0000 (12:40 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Mon, 4 Jul 2016 07:25:22 +0000 (09:25 +0200)
commit46210c440c7b2d32a8ee4e1f0248d0a0b4ad9fa5
tree4647f74f52b56a2024c9b06315472e84a634c3a5
parent10f4954ae67b3be6dac3cdfb1e0057c3779542be
s390: have unique symbol for __switch_to address

After linking there are several symbols for the same address that the
__switch_to symbol points to. E.g.:

000000000089b9c0 T __kprobes_text_start
000000000089b9c0 T __lock_text_end
000000000089b9c0 T __lock_text_start
000000000089b9c0 T __sched_text_end
000000000089b9c0 T __switch_to

When disassembling with "objdump -d" this results in a missing
__switch_to function. It would be named __kprobes_text_start
instead. To unconfuse objdump add a nop in front of the kprobes text
section. That way __switch_to appears again.

Obviously this solution is sort of a hack, since it also depends on
link order if this works or not. However it is the best I can come up
with for now.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/kernel/entry.S