diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-12-20 16:38:31 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-02-07 21:03:11 +1100 |
| commit | 0c81ed5ed43863d313cf253b0ebada6ea2f17676 (patch) | |
| tree | bb456b0b2c3fc10ec8dc28a2bc09aa88e943a7ac /arch/powerpc/kernel/trace/ftrace.c | |
| parent | 40b035efe288f42bbf4483236cde652584ccb64e (diff) | |
powerpc/ftrace: Refactor ftrace_{en/dis}able_ftrace_graph_caller
ftrace_enable_ftrace_graph_caller() and
ftrace_disable_ftrace_graph_caller() have common code.
They will have even more common code after following patch.
Refactor into a single ftrace_modify_ftrace_graph_caller() function.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f37785a531f1a8f201e1b3da45997a5c77e9d820.1640017960.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/trace/ftrace.c')
| -rw-r--r-- | arch/powerpc/kernel/trace/ftrace.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c index 80b6285769f2..ce673764cb69 100644 --- a/arch/powerpc/kernel/trace/ftrace.c +++ b/arch/powerpc/kernel/trace/ftrace.c @@ -910,30 +910,27 @@ int __init ftrace_dyn_arch_init(void) extern void ftrace_graph_call(void); extern void ftrace_graph_stub(void); -int ftrace_enable_ftrace_graph_caller(void) +static int ftrace_modify_ftrace_graph_caller(bool enable) { unsigned long ip = (unsigned long)(&ftrace_graph_call); unsigned long addr = (unsigned long)(&ftrace_graph_caller); unsigned long stub = (unsigned long)(&ftrace_graph_stub); ppc_inst_t old, new; - old = ftrace_call_replace(ip, stub, 0); - new = ftrace_call_replace(ip, addr, 0); + old = ftrace_call_replace(ip, enable ? stub : addr, 0); + new = ftrace_call_replace(ip, enable ? addr : stub, 0); return ftrace_modify_code(ip, old, new); } -int ftrace_disable_ftrace_graph_caller(void) +int ftrace_enable_ftrace_graph_caller(void) { - unsigned long ip = (unsigned long)(&ftrace_graph_call); - unsigned long addr = (unsigned long)(&ftrace_graph_caller); - unsigned long stub = (unsigned long)(&ftrace_graph_stub); - ppc_inst_t old, new; - - old = ftrace_call_replace(ip, addr, 0); - new = ftrace_call_replace(ip, stub, 0); + return ftrace_modify_ftrace_graph_caller(true); +} - return ftrace_modify_code(ip, old, new); +int ftrace_disable_ftrace_graph_caller(void) +{ + return ftrace_modify_ftrace_graph_caller(false); } /* |