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| author |   Ard Biesheuvel <ardb@kernel.org> | 2022-01-25 11:20:49 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2022-02-09 09:12:33 +0100 |
| commit | 953f534a7ed6b725d4f101d2949393acc9262880 (patch) | |
| tree | 7df80887659d9b3f7efb288b11bec86b8c7651c7 /arch/arm/include | |
| parent | ARM: ftrace: avoid unnecessary literal loads (diff) | |
| download | linux-dev-953f534a7ed6b725d4f101d2949393acc9262880.tar.xz linux-dev-953f534a7ed6b725d4f101d2949393acc9262880.zip | |
ARM: ftrace: enable HAVE_FUNCTION_GRAPH_FP_TEST
Fix the frame pointer handling in the function graph tracer entry and
exit code so we can enable HAVE_FUNCTION_GRAPH_FP_TEST. Instead of using
FP directly (which will have different values between the entry and exit
pieces of the function graph tracer), use the value of SP at entry and
exit, as we can derive the former value from the frame pointer.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/ftrace.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h index a4dbac07e4ef..b4f5fab6b04e 100644 --- a/arch/arm/include/asm/ftrace.h +++ b/arch/arm/include/asm/ftrace.h @@ -2,6 +2,8 @@ #ifndef _ASM_ARM_FTRACE #define _ASM_ARM_FTRACE +#define HAVE_FUNCTION_GRAPH_FP_TEST + #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS #define ARCH_SUPPORTS_FTRACE_OPS 1 #endif |