diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_syscalls.c | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 27eb18d69222..144cc14d8551 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -51,7 +51,7 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr) return syscalls_metadata[nr]; } -int syscall_name_to_nr(const char *name) +static int syscall_name_to_nr(const char *name) { int i; @@ -342,10 +342,8 @@ int reg_event_syscall_enter(struct ftrace_event_call *call) { int ret = 0; int num; - const char *name; - name = ((struct syscall_metadata *)call->data)->name; - num = syscall_name_to_nr(name); + num = ((struct syscall_metadata *)call->data)->syscall_nr; if (num < 0 || num >= NR_syscalls) return -ENOSYS; mutex_lock(&syscall_trace_lock); @@ -365,10 +363,8 @@ int reg_event_syscall_enter(struct ftrace_event_call *call) void unreg_event_syscall_enter(struct ftrace_event_call *call) { int num; - const char *name; - name = ((struct syscall_metadata *)call->data)->name; - num = syscall_name_to_nr(name); + num = ((struct syscall_metadata *)call->data)->syscall_nr; if (num < 0 || num >= NR_syscalls) return; mutex_lock(&syscall_trace_lock); @@ -383,10 +379,8 @@ int reg_event_syscall_exit(struct ftrace_event_call *call) { int ret = 0; int num; - const char *name; - name = ((struct syscall_metadata *)call->data)->name; - num = syscall_name_to_nr(name); + num = ((struct syscall_metadata *)call->data)->syscall_nr; if (num < 0 || num >= NR_syscalls) return -ENOSYS; mutex_lock(&syscall_trace_lock); @@ -406,10 +400,8 @@ int reg_event_syscall_exit(struct ftrace_event_call *call) void unreg_event_syscall_exit(struct ftrace_event_call *call) { int num; - const char *name; - name = ((struct syscall_metadata *)call->data)->name; - num = syscall_name_to_nr(name); + num = ((struct syscall_metadata *)call->data)->syscall_nr; if (num < 0 || num >= NR_syscalls) return; mutex_lock(&syscall_trace_lock); @@ -436,6 +428,10 @@ int __init init_ftrace_syscalls(void) for (i = 0; i < NR_syscalls; i++) { addr = arch_syscall_addr(i); meta = find_syscall_meta(addr); + if (!meta) + continue; + + meta->syscall_nr = i; syscalls_metadata[i] = meta; } |