ARM: mach-bcm: disable ftrace in SMC invocation routines

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The SMC calling convention uses R7 as an argument register, which
conflicts with its use as a frame pointer when building in Thumb2 mode.
Given that Clang with ftrace does not permit frame pointers to be
disabled, let's omit this compilation unit from ftrace instrumentation.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>

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Ard Biesheuvel 2022-02-01 11:56:44 +01:00

parent 1f640552d9

commit 64dff07b1c

1 changed files with 1 additions and 0 deletions

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arch/arm/mach-bcm/Makefile

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