powerpc/ftrace: Also save r1 in ftrace_caller()

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Also save r1 in ftrace_caller()

r1 is needed during unwinding when the function_graph tracer
is active.

Fixes: 830213786c ("powerpc/ftrace: directly call of function graph tracer by ftrace caller")
Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ff535e86d3a69376a6d89168511d4e403835f18b.1644949750.git.christophe.leroy@csgroup.eu

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Christophe Leroy 2022-02-15 19:31:22 +01:00 • committed by Michael Ellerman

parent cb7356986d

commit 34d8dac807

1 changed files with 4 additions and 0 deletions

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arch/powerpc/kernel/trace/ftrace_mprofile.S

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