diff options
Diffstat (limited to 'samples/bpf/offwaketime_kern.c')
| -rw-r--r-- | samples/bpf/offwaketime_kern.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/samples/bpf/offwaketime_kern.c b/samples/bpf/offwaketime_kern.c index 983629a31c79..e7d9a0a3d45b 100644 --- a/samples/bpf/offwaketime_kern.c +++ b/samples/bpf/offwaketime_kern.c @@ -11,7 +11,7 @@ #include <linux/version.h> #include <linux/sched.h> -#define _(P) ({typeof(P) val = 0; bpf_probe_read(&val, sizeof(val), &P); val;}) +#define _(P) ({typeof(P) val; bpf_probe_read(&val, sizeof(val), &P); val;}) #define MINBLOCK_US 1 @@ -61,7 +61,7 @@ SEC("kprobe/try_to_wake_up") int waker(struct pt_regs *ctx) { struct task_struct *p = (void *) PT_REGS_PARM1(ctx); - struct wokeby_t woke = {}; + struct wokeby_t woke; u32 pid; pid = _(p->pid); @@ -75,17 +75,19 @@ int waker(struct pt_regs *ctx) static inline int update_counts(void *ctx, u32 pid, u64 delta) { - struct key_t key = {}; struct wokeby_t *woke; u64 zero = 0, *val; + struct key_t key; + __builtin_memset(&key.waker, 0, sizeof(key.waker)); bpf_get_current_comm(&key.target, sizeof(key.target)); key.tret = bpf_get_stackid(ctx, &stackmap, STACKID_FLAGS); + key.wret = 0; woke = bpf_map_lookup_elem(&wokeby, &pid); if (woke) { key.wret = woke->ret; - __builtin_memcpy(&key.waker, woke->name, TASK_COMM_LEN); + __builtin_memcpy(&key.waker, woke->name, sizeof(key.waker)); bpf_map_delete_elem(&wokeby, &pid); } |