Prev: [PATCH 27/40] trace syscalls: Add COMPAT_SYSCALL_DEFINE0 macro
Next: [PATCH 21/40] trace syscalls, PPC: Add ftrace compat syscall support for PPC64
From: Ian Munsie on 23 Jun 2010 06:20
From: Ian Munsie <imunsie(a)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(a)au1.ibm.com>
---
kernel/trace/trace_syscalls.c | 18 ------------------
1 files changed, 0 insertions(+), 18 deletions(-)

diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 6acba20..9010405 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -391,11 +391,7 @@ void ftrace_syscall_exit(void *ignore, struct pt_regs *regs, long ret)
int reg_event_syscall_enter(struct ftrace_event_call *call)
{
int ret = 0;
- 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);
@@ -409,11 +405,6 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)

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--;
((struct syscall_metadata *)call->data)->ftrace_enter = 0;
@@ -425,11 +416,7 @@ void unreg_event_syscall_enter(struct ftrace_event_call *call)
int reg_event_syscall_exit(struct ftrace_event_call *call)
{
int ret = 0;
- 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);
@@ -443,11 +430,6 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)

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--;
((struct syscall_metadata *)call->data)->ftrace_exit = 0;
--
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [PATCH 27/40] trace syscalls: Add COMPAT_SYSCALL_DEFINE0 macro
Next: [PATCH 21/40] trace syscalls, PPC: Add ftrace compat syscall support for PPC64