s390/ftrace: add FTRACE_GEN_NOP_ASM macro

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FTRACE_GEN_NOP_ASM(name) can be used to generate assembly functions with
the required information added to allow tracing via kprobes/ftrace. It
adds the nop instruction which will be patched by ftrace later. If the
compiler supports -mnop-mcount it will also add an entry to the
__mcount_loc section.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Sven Schnelle 2021-09-24 15:03:07 +02:00 • committed by Vasily Gorbik

parent 54235d5cfe

commit f768a20c0a

1 changed files with 28 additions and 0 deletions

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arch/s390/include/asm/ftrace.h

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