^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * @file cpu_buffer.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * @remark Copyright 2002-2009 OProfile authors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * @remark Read the file COPYING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * @author John Levon <levon@movementarian.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * @author Barry Kasindorf <barry.kasindorf@amd.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * @author Robert Richter <robert.richter@amd.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Each CPU has a local buffer that stores PC value/event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * pairs. We also log context switches when we notice them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Eventually each CPU's buffer is processed into the global
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * event buffer by sync_buffer().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * We use a local buffer for two reasons: an NMI or similar
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * interrupt cannot synchronise, and high sampling rates
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * would lead to catastrophic global synchronisation if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * a global buffer was used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/oprofile.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "event_buffer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "cpu_buffer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "buffer_sync.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "oprof.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define OP_BUFFER_FLAGS 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static struct trace_buffer *op_ring_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) DEFINE_PER_CPU(struct oprofile_cpu_buffer, op_cpu_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static void wq_sync_buffer(struct work_struct *work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define DEFAULT_TIMER_EXPIRE (HZ / 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static int work_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned long oprofile_get_cpu_buffer_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return oprofile_cpu_buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void oprofile_cpu_buffer_inc_smpl_lost(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) cpu_buf->sample_lost_overflow++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) void free_cpu_buffers(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (op_ring_buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ring_buffer_free(op_ring_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) op_ring_buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define RB_EVENT_HDR_SIZE 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int alloc_cpu_buffers(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) unsigned long buffer_size = oprofile_cpu_buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) unsigned long byte_size = buffer_size * (sizeof(struct op_sample) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) RB_EVENT_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) op_ring_buffer = ring_buffer_alloc(byte_size, OP_BUFFER_FLAGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!op_ring_buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) b->last_task = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) b->last_is_kernel = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) b->tracing = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) b->buffer_size = buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) b->sample_received = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) b->sample_lost_overflow = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) b->backtrace_aborted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) b->sample_invalid_eip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) b->cpu = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) INIT_DELAYED_WORK(&b->work, wq_sync_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) free_cpu_buffers();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) void start_cpu_work(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) work_enabled = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) for_each_online_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Spread the work by 1 jiffy per cpu so they dont all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * fire at once.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) schedule_delayed_work_on(i, &b->work, DEFAULT_TIMER_EXPIRE + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) void end_cpu_work(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) work_enabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) void flush_cpu_work(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) for_each_online_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* these works are per-cpu, no need for flush_sync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) flush_delayed_work(&b->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * This function prepares the cpu buffer to write a sample.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * Struct op_entry is used during operations on the ring buffer while
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * struct op_sample contains the data that is stored in the ring
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * buffer. Struct entry can be uninitialized. The function reserves a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * data array that is specified by size. Use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * op_cpu_buffer_write_commit() after preparing the sample. In case of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * errors a null pointer is returned, otherwise the pointer to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * sample.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct op_sample
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) *op_cpu_buffer_write_reserve(struct op_entry *entry, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) entry->event = ring_buffer_lock_reserve
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) (op_ring_buffer, sizeof(struct op_sample) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) size * sizeof(entry->sample->data[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (!entry->event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) entry->sample = ring_buffer_event_data(entry->event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) entry->size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) entry->data = entry->sample->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return entry->sample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int op_cpu_buffer_write_commit(struct op_entry *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return ring_buffer_unlock_commit(op_ring_buffer, entry->event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct ring_buffer_event *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) e = ring_buffer_consume(op_ring_buffer, cpu, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (!e)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) entry->event = e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) entry->sample = ring_buffer_event_data(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) entry->size = (ring_buffer_event_length(e) - sizeof(struct op_sample))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) / sizeof(entry->sample->data[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) entry->data = entry->sample->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return entry->sample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) unsigned long op_cpu_buffer_entries(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return ring_buffer_entries_cpu(op_ring_buffer, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) op_add_code(struct oprofile_cpu_buffer *cpu_buf, unsigned long backtrace,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) int is_kernel, struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct op_entry entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct op_sample *sample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (backtrace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) flags |= TRACE_BEGIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) /* notice a switch from user->kernel or vice versa */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) is_kernel = !!is_kernel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (cpu_buf->last_is_kernel != is_kernel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) cpu_buf->last_is_kernel = is_kernel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) flags |= KERNEL_CTX_SWITCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (is_kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) flags |= IS_KERNEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /* notice a task switch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (cpu_buf->last_task != task) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) cpu_buf->last_task = task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) flags |= USER_CTX_SWITCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (!flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* nothing to do */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (flags & USER_CTX_SWITCH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) size = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) sample = op_cpu_buffer_write_reserve(&entry, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (!sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) sample->eip = ESCAPE_CODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) sample->event = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) op_cpu_buffer_add_data(&entry, (unsigned long)task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) op_cpu_buffer_write_commit(&entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) op_add_sample(struct oprofile_cpu_buffer *cpu_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) unsigned long pc, unsigned long event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct op_entry entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct op_sample *sample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) sample = op_cpu_buffer_write_reserve(&entry, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (!sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) sample->eip = pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) sample->event = event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return op_cpu_buffer_write_commit(&entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * This must be safe from any context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * is_kernel is needed because on some architectures you cannot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * tell if you are in kernel or user space simply by looking at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * pc. We tag this in the buffer by generating kernel enter/exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * events whenever is_kernel changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) unsigned long backtrace, int is_kernel, unsigned long event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct task_struct *tsk = task ? task : current;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) cpu_buf->sample_received++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (pc == ESCAPE_CODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) cpu_buf->sample_invalid_eip++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (op_add_code(cpu_buf, backtrace, is_kernel, tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (op_add_sample(cpu_buf, pc, event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) cpu_buf->sample_lost_overflow++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static inline void oprofile_begin_trace(struct oprofile_cpu_buffer *cpu_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) cpu_buf->tracing = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static inline void oprofile_end_trace(struct oprofile_cpu_buffer *cpu_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) cpu_buf->tracing = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) __oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) unsigned long event, int is_kernel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) unsigned long backtrace = oprofile_backtrace_depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * if log_sample() fail we can't backtrace since we lost the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * source of this event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (!log_sample(cpu_buf, pc, backtrace, is_kernel, event, task))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (!backtrace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) oprofile_begin_trace(cpu_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) oprofile_ops.backtrace(regs, backtrace);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) oprofile_end_trace(cpu_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) void oprofile_add_ext_hw_sample(unsigned long pc, struct pt_regs * const regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) unsigned long event, int is_kernel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) __oprofile_add_ext_sample(pc, regs, event, is_kernel, task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) unsigned long event, int is_kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) __oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) int is_kernel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) unsigned long pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (likely(regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) is_kernel = !user_mode(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) pc = profile_pc(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) is_kernel = 0; /* This value will not be used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) pc = ESCAPE_CODE; /* as this causes an early return. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) __oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * Add samples with data to the ring buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * Use oprofile_add_data(&entry, val) to add data and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) * oprofile_write_commit(&entry) to commit the sample.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) oprofile_write_reserve(struct op_entry *entry, struct pt_regs * const regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) unsigned long pc, int code, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) struct op_sample *sample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) int is_kernel = !user_mode(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) cpu_buf->sample_received++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) /* no backtraces for samples with data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (op_add_code(cpu_buf, 0, is_kernel, current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) sample = op_cpu_buffer_write_reserve(entry, size + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (!sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) sample->eip = ESCAPE_CODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) sample->event = 0; /* no flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) op_cpu_buffer_add_data(entry, code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) op_cpu_buffer_add_data(entry, pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) entry->event = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) cpu_buf->sample_lost_overflow++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) int oprofile_add_data(struct op_entry *entry, unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (!entry->event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return op_cpu_buffer_add_data(entry, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int oprofile_add_data64(struct op_entry *entry, u64 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (!entry->event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (op_cpu_buffer_get_size(entry) < 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * the function returns 0 to indicate a too small
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) * buffer, even if there is some space left
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (!op_cpu_buffer_add_data(entry, (u32)val))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return op_cpu_buffer_add_data(entry, (u32)(val >> 32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) int oprofile_write_commit(struct op_entry *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (!entry->event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return op_cpu_buffer_write_commit(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) log_sample(cpu_buf, pc, 0, is_kernel, event, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) void oprofile_add_trace(unsigned long pc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (!cpu_buf->tracing)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * broken frame can give an eip with the same value as an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * escape code, abort the trace if we get it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (pc == ESCAPE_CODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (op_add_sample(cpu_buf, pc, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) cpu_buf->tracing = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) cpu_buf->backtrace_aborted++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) * This serves to avoid cpu buffer overflow, and makes sure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * the task mortuary progresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * By using schedule_delayed_work_on and then schedule_delayed_work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * we guarantee this will stay on the correct cpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) static void wq_sync_buffer(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct oprofile_cpu_buffer *b =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) container_of(work, struct oprofile_cpu_buffer, work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (b->cpu != smp_processor_id() && !cpu_online(b->cpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) cancel_delayed_work(&b->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) sync_buffer(b->cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) /* don't re-add the work if we're shutting down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (work_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) schedule_delayed_work(&b->work, DEFAULT_TIMER_EXPIRE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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