C++ pr_cont函数代码示例

/* This is called whenever we have a unrecoverable failure:
       transmit timeout
       Bad ring buffer packet header
 */
static void
el2_reset_8390(struct net_device *dev)
{
    if (ei_debug > 1) {
	pr_debug("%s: Resetting the 3c503 board...", dev->name);
	pr_cont(" %#lx=%#02x %#lx=%#02x %#lx=%#02x...", E33G_IDCFR, inb(E33G_IDCFR),
	       E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR));
    }
    outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL);
    ei_status.txing = 0;
    outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
    el2_init_card(dev);
    if (ei_debug > 1)
	pr_cont("done\n");
}

void
show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
		   unsigned long *sp, unsigned long bp, char *log_lvl)
{
	unsigned long *irq_stack_end;
	unsigned long *irq_stack;
	unsigned long *stack;
	int cpu;
	int i;

	preempt_disable();
	cpu = smp_processor_id();

	irq_stack_end	= (unsigned long *)(per_cpu(irq_stack_ptr, cpu));
	irq_stack	= (unsigned long *)(per_cpu(irq_stack_ptr, cpu) - IRQ_STACK_SIZE);

	/*
	 * Debugging aid: "show_stack(NULL, NULL);" prints the
	 * back trace for this cpu:
	 */
	if (sp == NULL) {
		if (task)
			sp = (unsigned long *)task->thread.sp;
		else
			sp = (unsigned long *)&sp;
	}

	stack = sp;
	for (i = 0; i < kstack_depth_to_print; i++) {
		if (stack >= irq_stack && stack <= irq_stack_end) {
			if (stack == irq_stack_end) {
				stack = (unsigned long *) (irq_stack_end[-1]);
				pr_cont(" <EOI> ");
			}
		} else {
		if (((long) stack & (THREAD_SIZE-1)) == 0)
			break;
		}
		if (i && ((i % STACKSLOTS_PER_LINE) == 0))
			pr_cont("\n");
		pr_cont(" %016lx", *stack++);
		touch_nmi_watchdog();
	}
	preempt_enable();

	pr_cont("\n");
	show_trace_log_lvl(task, regs, sp, bp, log_lvl);
}

static ssize_t keypadled_poweron(struct device *dev,
	struct device_attribute *attr, const char *buf,
	size_t size)
{
	int ret;
	int data;
	struct matrix_keypad_platform_data *pdata = dev_get_drvdata(dev);

	sscanf(buf, "%d", &data);
	dev_err(dev,"%s : data = %d", __func__, data);

	if (data){
		if (pdata->vddo_vreg){
			ret = regulator_enable(pdata->vddo_vreg);
			if (ret) {
				dev_err(dev,"%s: failed to enable vddo, %d\n", __func__, ret);
				return size;
			}
		}
	} else {
		if (pdata->vddo_vreg) {
			ret = regulator_disable(pdata->vddo_vreg);
			if (ret) {
				dev_err(dev,"%s: failed to disable vddo, %d\n", __func__, ret);
				return size;
			}
		}
	}

	pr_cont(" [%d]\n", regulator_is_enabled(pdata->vddo_vreg));

	return size;
}

/**
 * pr_cont_kernfs_path - pr_cont path of a kernfs_node
 * @kn: kernfs_node of interest
 *
 * This function can be called from any context.
 */
void pr_cont_kernfs_path(struct kernfs_node *kn)
{
	unsigned long flags;
	char *p;

	spin_lock_irqsave(&kernfs_rename_lock, flags);

	p = kernfs_path_locked(kn, kernfs_pr_cont_buf,
			       sizeof(kernfs_pr_cont_buf));
	if (p)
		pr_cont("%s", p);
	else
		pr_cont("<name too long>");

	spin_unlock_irqrestore(&kernfs_rename_lock, flags);
}

__init int p6_pmu_init(void)
{
	switch (boot_cpu_data.x86_model) {
	case 1:
	case 3:  /* Pentium Pro */
	case 5:
	case 6:  /* Pentium II */
	case 7:
	case 8:
	case 11: /* Pentium III */
	case 9:
	case 13:
		/* Pentium M */
		break;
	default:
		pr_cont("unsupported p6 CPU model %d ",
			boot_cpu_data.x86_model);
		return -ENODEV;
	}

	x86_pmu = p6_pmu;

	memcpy(hw_cache_event_ids, p6_hw_cache_event_ids,
		sizeof(hw_cache_event_ids));


	return 0;
}

static void poison_error(mempool_t *pool, void *element, size_t size,
			 size_t byte)
{
	const int nr = pool->curr_nr;
	const int start = max_t(int, byte - (BITS_PER_LONG / 8), 0);
	const int end = min_t(int, byte + (BITS_PER_LONG / 8), size);
	int i;

	pr_err("BUG: mempool element poison mismatch\n");
	pr_err("Mempool %p size %zu\n", pool, size);
	pr_err(" nr=%d @ %p: %s0x", nr, element, start > 0 ? "... " : "");
	for (i = start; i < end; i++)
		pr_cont("%x ", *(u8 *)(element + i));
	pr_cont("%s\n", end < size ? "..." : "");
	dump_stack();
}

__init int p6_pmu_init(void)
{
	x86_pmu = p6_pmu;

	switch (boot_cpu_data.x86_model) {
	case  1: /* Pentium Pro */
		x86_add_quirk(p6_pmu_rdpmc_quirk);
		break;

	case  3: /* Pentium II - Klamath */
	case  5: /* Pentium II - Deschutes */
	case  6: /* Pentium II - Mendocino */
		break;

	case  7: /* Pentium III - Katmai */
	case  8: /* Pentium III - Coppermine */
	case 10: /* Pentium III Xeon */
	case 11: /* Pentium III - Tualatin */
		break;

	case  9: /* Pentium M - Banias */
	case 13: /* Pentium M - Dothan */
		break;

	default:
		pr_cont("unsupported p6 CPU model %d ", boot_cpu_data.x86_model);
		return -ENODEV;
	}

	memcpy(hw_cache_event_ids, p6_hw_cache_event_ids,
		sizeof(hw_cache_event_ids));

	return 0;
}

static void nouveau_pgraph_vstatus_print(struct nv50_graph_priv *priv, int r,
		const char *const units[], u32 status)
{
	int i;

	nv_error(priv, "PGRAPH_VSTATUS%d: 0x%08x", r, status);

	for (i = 0; units[i] && status; i++) {
		if ((status & 7) == 1)
			pr_cont(" %s", units[i]);
		status >>= 3;
	}
	if (status)
		pr_cont(" (invalid: 0x%x)", status);
	pr_cont("\n");
}

int send_fault_sig(struct pt_regs *regs)
{
	int signo, si_code;
	void __user *addr;

	signo = current->thread.signo;
	si_code = current->thread.code;
	addr = (void __user *)current->thread.faddr;
	pr_debug("send_fault_sig: %p,%d,%d\n", addr, signo, si_code);

	if (user_mode(regs)) {
		force_sig_fault(signo, si_code, addr, current);
	} else {
		if (fixup_exception(regs))
			return -1;

		//if (signo == SIGBUS)
		//	force_sig_fault(si_signo, si_code, addr, current);

		/*
		 * Oops. The kernel tried to access some bad page. We'll have to
		 * terminate things with extreme prejudice.
		 */
		if ((unsigned long)addr < PAGE_SIZE)
			pr_alert("Unable to handle kernel NULL pointer dereference");
		else
			pr_alert("Unable to handle kernel access");
		pr_cont(" at virtual address %p\n", addr);
		die_if_kernel("Oops", regs, 0 /*error_code*/);
		do_exit(SIGKILL);
	}

	return 1;
}

static int __init msr_init(void)
{
	int i, j = 0;

	if (!boot_cpu_has(X86_FEATURE_TSC)) {
		pr_cont("no MSR PMU driver.\n");
		return 0;
	}

	/* Probe the MSRs. */
	for (i = PERF_MSR_TSC + 1; i < PERF_MSR_EVENT_MAX; i++) {
		u64 val;

		/*
		 * Virt sucks arse; you cannot tell if a R/O MSR is present :/
		 */
		if (!msr[i].test(i) || rdmsrl_safe(msr[i].msr, &val))
			msr[i].attr = NULL;
	}

	/* List remaining MSRs in the sysfs attrs. */
	for (i = 0; i < PERF_MSR_EVENT_MAX; i++) {
		if (msr[i].attr)
			events_attrs[j++] = &msr[i].attr->attr.attr;
	}
	events_attrs[j] = NULL;

	perf_pmu_register(&pmu_msr, "msr", -1);

	return 0;
}

static void decode_mc3_mce(struct mce *m)
{
	u16 ec = EC(m->status);
	u8 xec = XEC(m->status, xec_mask);

	if (boot_cpu_data.x86 >= 0x14) {
		pr_emerg("You shouldn't be seeing MC3 MCE on this cpu family,"
			 " please report on LKML.\n");
		return;
	}

	pr_emerg(HW_ERR "MC3 Error");

	if (xec == 0x0) {
		u8 r4 = R4(ec);

		if (!BUS_ERROR(ec) || (r4 != R4_DRD && r4 != R4_DWR))
			goto wrong_mc3_mce;

		pr_cont(" during %s.\n", R4_MSG(ec));
	} else
		goto wrong_mc3_mce;

	return;

 wrong_mc3_mce:
	pr_emerg(HW_ERR "Corrupted MC3 MCE info?\n");
}

/*
 * Common routine to print scratch regs (r0-r12) or callee regs (r13-r25)
 *   -Prints 3 regs per line and a CR.
 *   -To continue, callee regs right after scratch, special handling of CR
 */
static noinline void print_reg_file(long *reg_rev, int start_num)
{
	unsigned int i;
	char buf[512];
	int n = 0, len = sizeof(buf);

	for (i = start_num; i < start_num + 13; i++) {
		n += scnprintf(buf + n, len - n, "r%02u: 0x%08lx\t",
			       i, (unsigned long)*reg_rev);

		if (((i + 1) % 3) == 0)
			n += scnprintf(buf + n, len - n, "\n");

		/* because pt_regs has regs reversed: r12..r0, r25..r13 */
		if (is_isa_arcv2() && start_num == 0)
			reg_rev++;
		else
			reg_rev--;
	}

	if (start_num != 0)
		n += scnprintf(buf + n, len - n, "\n\n");

	/* To continue printing callee regs on same line as scratch regs */
	if (start_num == 0)
		pr_info("%s", buf);
	else
		pr_cont("%s\n", buf);
}

static void decode_BRCC_0(unsigned int opcode)
{
	int B = ((opcode >> BRCC_B_bits) & BRCC_B_mask);
	int T = ((opcode >> BRCC_T_bits) & BRCC_T_mask);

	pr_cont("IF %sCC JUMP pcrel %s", T ? "" : "!", B ? "(BP)" : "");
}

static void __init of_dump_addr(const char *s, const __be32 *addr, int na)
{
	pr_debug("%s", s);
	while(na--)
		pr_cont(" %08x", *(addr++));
	pr_debug("\n");
}

static void __init setup_initrd(void)
{
	unsigned long size;

	if (initrd_start >= initrd_end) {
		pr_info("initrd not found or empty");
		goto disable;
	}
	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
		pr_err("initrd extends beyond end of memory");
		goto disable;
	}

	size = initrd_end - initrd_start;
	memblock_reserve(__pa(initrd_start), size);
	initrd_below_start_ok = 1;

	pr_info("Initial ramdisk at: 0x%p (%lu bytes)\n",
		(void *)(initrd_start), size);
	return;
disable:
	pr_cont(" - disabling initrd\n");
	initrd_start = 0;
	initrd_end = 0;
}