From: Ian Munsie <imunsie@au1.ibm.com>
With the ftrace events now checking if the syscall_nr is valid upon
initialisation, there is no need to verify it when registering and
unregistering the events, so remove the check.
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
---
kernel/trace/trace_syscalls.c | 9 +--------
1 files changed, 1 insertions(+), 8 deletions(-)
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 14f4c02..5e34b49 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -367,8 +367,6 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
int num;
num = ((struct syscall_metadata *)call->data)->syscall_nr;
- if (num < 0 || num >= NR_syscalls)
- return -ENOSYS;
mutex_lock(&syscall_trace_lock);
if (!sys_refcount_enter)
ret = register_trace_sys_enter(ftrace_syscall_enter, NULL);
@@ -385,8 +383,6 @@ void unreg_event_syscall_enter(struct ftrace_event_call *call)
int num;
num = ((struct syscall_metadata *)call->data)->syscall_nr;
- if (num < 0 || num >= NR_syscalls)
- return;
mutex_lock(&syscall_trace_lock);
sys_refcount_enter--;
clear_bit(num, enabled_enter_syscalls);
@@ -401,8 +397,7 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
int num;
num = ((struct syscall_metadata *)call->data)->syscall_nr;
- if (num < 0 || num >= NR_syscalls)
- return -ENOSYS;
+
mutex_lock(&syscall_trace_lock);
if (!sys_refcount_exit)
ret = register_trace_sys_exit(ftrace_syscall_exit, NULL);
@@ -419,8 +414,6 @@ void unreg_event_syscall_exit(struct ftrace_event_call *call)
int num;
num = ((struct syscall_metadata *)call->data)->syscall_nr;
- if (num < 0 || num >= NR_syscalls)
- return;
mutex_lock(&syscall_trace_lock);
sys_refcount_exit--;
clear_bit(num, enabled_exit_syscalls);
--
1.7.2.3
--
