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| author | Ingo Molnar <mingo@kernel.org> | 2019-12-10 12:11:00 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-12-10 12:11:00 +0300 |
| commit | 2040cf9f59037aa8aec749363e69ead165b67b43 (patch) | |
| tree | e9c15448e841cc493bc80b9f658d7955623e86dd /arch/x86/include/asm/ftrace.h | |
| parent | f66c0447cca1281116224d474cdb37d6a18e4b5b (diff) | |
| parent | e42617b825f8073569da76dc4510bfa019b1c35a (diff) | |
| download | linux-2040cf9f59037aa8aec749363e69ead165b67b43.tar.xz | |
Merge tag 'v5.5-rc1' into core/kprobes, to resolve conflicts
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/ftrace.h')
| -rw-r--r-- | arch/x86/include/asm/ftrace.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h index dbd9b08bf173..85be2f506272 100644 --- a/arch/x86/include/asm/ftrace.h +++ b/arch/x86/include/asm/ftrace.h @@ -28,6 +28,19 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr) return addr; } +/* + * When a ftrace registered caller is tracing a function that is + * also set by a register_ftrace_direct() call, it needs to be + * differentiated in the ftrace_caller trampoline. To do this, we + * place the direct caller in the ORIG_AX part of pt_regs. This + * tells the ftrace_caller that there's a direct caller. + */ +static inline void arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr) +{ + /* Emulate a call */ + regs->orig_ax = addr; +} + #ifdef CONFIG_DYNAMIC_FTRACE struct dyn_arch_ftrace { |