powerpc/ftrace: Simplify ftrace_make_nop()

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Now that we validate the ftrace location during initialization in
ftrace_init_nop(), we can simplify ftrace_make_nop() to patch-in the nop
without worrying about the instructions surrounding the ftrace location.
Note that we continue to ensure that we have a bl to
ftrace_[regs_]caller at the ftrace location before nop-ing it out.

Signed-off-by: Naveen N Rao <naveen@kernel.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/e12ccbf28c50c3a07fb614f4d392e55f7098a729.1687166935.git.naveen@kernel.org

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Naveen N Rao 2023-06-19 15:17:29 +05:30 • committed by Michael Ellerman

parent cc93b92332

commit 562bde0bfc

1 changed files with 32 additions and 188 deletions

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arch/powerpc/kernel/trace/ftrace.c

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