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s390/ftrace: add ftrace_instruction_pointer_set() helper function 

Add ftrace_instruction_pointer_set() helper function to match x86.
See commit 2860cd8a23 ("livepatch: Use the default ftrace_ops
instead of REGS when ARGS is available").

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-10-04 16:16:45 +02:00 committed by Vasily Gorbik
parent 5740a7c71a
commit 176510ebec
2 changed files with 9 additions and 3 deletions
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8
arch/s390/include/asm/ftrace.h
View File

@ -51,6 +51,14 @@ static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *
return &fregs->regs;
}
static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs,
unsigned long ip)
{
struct pt_regs *regs = arch_ftrace_get_regs(fregs);
regs->psw.addr = ip;
}
/*
* Even though the system call numbers are identical for s390/s390x a
* different system call table is used for compat tasks. This may lead

4
arch/s390/include/asm/livepatch.h
View File

@ -16,9 +16,7 @@
static inline void klp_arch_set_pc(struct ftrace_regs *fregs, unsigned long ip)
{
struct pt_regs *regs = ftrace_get_regs(fregs);
regs->psw.addr = ip;
ftrace_instruction_pointer_set(fregs, ip);
}
#endif