s390/jump label: use different nop instruction

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Use a brcl 0,2 instruction for jump label nops during compile time,
so we don't mix up the different nops during mcount/hotpatch call
site detection.
The initial jump label code instruction replacement will exchange
these instructions with either a branch or a brcl 0,0 instruction.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2015-01-29 14:10:22 +01:00 • committed by Martin Schwidefsky

parent 5c6497c50f

commit d5caa4dbf9

2 changed files with 19 additions and 7 deletions

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7

arch/s390/include/asm/jump_label.h

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19

arch/s390/kernel/jump_label.c

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