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ftrace: rename ftrace_instruction_pointer_set() -> ftrace_regs_set_instruction_pointer()

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In subsequent patches we'll add a sew of ftrace_regs_{get,set}_*()
helpers. In preparation, this patch renames
ftrace_instruction_pointer_set() to
ftrace_regs_set_instruction_pointer().

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Florent Revest <revest@chromium.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20221103170520.931305-3-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Rutland 2022-11-03 17:05:18 +00:00 committed by Will Deacon
parent 9705bc7096
commit 0ef86097f1
5 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/include/asm/ftrace.h
View File

@ -37,8 +37,9 @@ static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *
return fregs->regs.msr ? &fregs->regs : NULL;
}
static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs,
unsigned long ip)
static __always_inline void
ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs,
unsigned long ip)
{
regs_set_return_ip(&fregs->regs, ip);
}

5
arch/s390/include/asm/ftrace.h
View File

@ -54,8 +54,9 @@ static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *
return NULL;
}
static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs,
unsigned long ip)
static __always_inline void
ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs,
unsigned long ip)
{
fregs->regs.psw.addr = ip;
}

2
arch/x86/include/asm/ftrace.h
View File

@ -48,7 +48,7 @@ arch_ftrace_get_regs(struct ftrace_regs *fregs)
return &fregs->regs;
}
#define ftrace_instruction_pointer_set(fregs, _ip) \
#define ftrace_regs_set_instruction_pointer(fregs, _ip) \
do { (fregs)->regs.ip = (_ip); } while (0)
struct ftrace_ops;

9
include/linux/ftrace.h
View File

@ -111,12 +111,11 @@ struct ftrace_regs {
#define arch_ftrace_get_regs(fregs) (&(fregs)->regs)
/*
* ftrace_instruction_pointer_set() is to be defined by the architecture
* if to allow setting of the instruction pointer from the ftrace_regs
* when HAVE_DYNAMIC_FTRACE_WITH_ARGS is set and it supports
* live kernel patching.
* ftrace_regs_set_instruction_pointer() is to be defined by the architecture
* if to allow setting of the instruction pointer from the ftrace_regs when
* HAVE_DYNAMIC_FTRACE_WITH_ARGS is set and it supports live kernel patching.
*/
#define ftrace_instruction_pointer_set(fregs, ip) do { } while (0)
#define ftrace_regs_set_instruction_pointer(fregs, ip) do { } while (0)
#endif /* CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS */
static __always_inline struct pt_regs *ftrace_get_regs(struct ftrace_regs *fregs)

2
kernel/livepatch/patch.c
View File

@ -118,7 +118,7 @@ static void notrace klp_ftrace_handler(unsigned long ip,
if (func->nop)
goto unlock;
ftrace_instruction_pointer_set(fregs, (unsigned long)func->new_func);
ftrace_regs_set_instruction_pointer(fregs, (unsigned long)func->new_func);
unlock:
ftrace_test_recursion_unlock(bit);