Revision bfeda41d06d85ad9d52f2413cfc2b77be5022f75 authored by Omar Sandoval on 07 February 2017, 23:33:20 UTC, committed by Ingo Molnar on 08 February 2017, 07:21:31 UTC
Since KERN_CONT became meaningful again, lockdep stack traces have had annoying extra newlines, like this: [ 5.561122] -> #1 (B){+.+...}: [ 5.561528] [ 5.561532] [<ffffffff810d8873>] lock_acquire+0xc3/0x210 [ 5.562178] [ 5.562181] [<ffffffff816f6414>] mutex_lock_nested+0x74/0x6d0 [ 5.562861] [ 5.562880] [<ffffffffa01aa3c3>] init_btrfs_fs+0x21/0x196 [btrfs] [ 5.563717] [ 5.563721] [<ffffffff81000472>] do_one_initcall+0x52/0x1b0 [ 5.564554] [ 5.564559] [<ffffffff811a3af6>] do_init_module+0x5f/0x209 [ 5.565357] [ 5.565361] [<ffffffff81122f4d>] load_module+0x218d/0x2b80 [ 5.566020] [ 5.566021] [<ffffffff81123beb>] SyS_finit_module+0xeb/0x120 [ 5.566694] [ 5.566696] [<ffffffff816fd241>] entry_SYSCALL_64_fastpath+0x1f/0xc2 That's happening because each printk() call now gets printed on its own line, and we do a separate call to print the spaces before the symbol. Fix it by doing the printk() directly instead of using the print_ip_sym() helper. Additionally, the symbol address isn't very helpful, so let's get rid of that, too. The final result looks like this: [ 5.194518] -> #1 (B){+.+...}: [ 5.195002] lock_acquire+0xc3/0x210 [ 5.195439] mutex_lock_nested+0x74/0x6d0 [ 5.196491] do_one_initcall+0x52/0x1b0 [ 5.196939] do_init_module+0x5f/0x209 [ 5.197355] load_module+0x218d/0x2b80 [ 5.197792] SyS_finit_module+0xeb/0x120 [ 5.198251] entry_SYSCALL_64_fastpath+0x1f/0xc2 Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Omar Sandoval <osandov@fb.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kernel-team@fb.com Fixes: 4bcc595ccd80 ("printk: reinstate KERN_CONT for printing continuation lines") Link: http://lkml.kernel.org/r/43b4e114724b2bdb0308fa86cb33aa07d3d67fad.1486510315.git.osandov@fb.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 parent 926af62
acpi_watchdog.c
/*
* ACPI watchdog table parsing support.
*
* Copyright (C) 2016, Intel Corporation
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) "ACPI: watchdog: " fmt
#include <linux/acpi.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include "internal.h"
/**
* Returns true if this system should prefer ACPI based watchdog instead of
* the native one (which are typically the same hardware).
*/
bool acpi_has_watchdog(void)
{
struct acpi_table_header hdr;
if (acpi_disabled)
return false;
return ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_WDAT, 0, &hdr));
}
EXPORT_SYMBOL_GPL(acpi_has_watchdog);
void __init acpi_watchdog_init(void)
{
const struct acpi_wdat_entry *entries;
const struct acpi_table_wdat *wdat;
struct list_head resource_list;
struct resource_entry *rentry;
struct platform_device *pdev;
struct resource *resources;
size_t nresources = 0;
acpi_status status;
int i;
status = acpi_get_table(ACPI_SIG_WDAT, 0,
(struct acpi_table_header **)&wdat);
if (ACPI_FAILURE(status)) {
/* It is fine if there is no WDAT */
return;
}
/* Watchdog disabled by BIOS */
if (!(wdat->flags & ACPI_WDAT_ENABLED))
return;
/* Skip legacy PCI WDT devices */
if (wdat->pci_segment != 0xff || wdat->pci_bus != 0xff ||
wdat->pci_device != 0xff || wdat->pci_function != 0xff)
return;
INIT_LIST_HEAD(&resource_list);
entries = (struct acpi_wdat_entry *)(wdat + 1);
for (i = 0; i < wdat->entries; i++) {
const struct acpi_generic_address *gas;
struct resource_entry *rentry;
struct resource res;
bool found;
gas = &entries[i].register_region;
res.start = gas->address;
if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
res.flags = IORESOURCE_MEM;
res.end = res.start + ALIGN(gas->access_width, 4);
} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
res.flags = IORESOURCE_IO;
res.end = res.start + gas->access_width;
} else {
pr_warn("Unsupported address space: %u\n",
gas->space_id);
goto fail_free_resource_list;
}
found = false;
resource_list_for_each_entry(rentry, &resource_list) {
if (resource_contains(rentry->res, &res)) {
found = true;
break;
}
}
if (!found) {
rentry = resource_list_create_entry(NULL, 0);
if (!rentry)
goto fail_free_resource_list;
*rentry->res = res;
resource_list_add_tail(rentry, &resource_list);
nresources++;
}
}
resources = kcalloc(nresources, sizeof(*resources), GFP_KERNEL);
if (!resources)
goto fail_free_resource_list;
i = 0;
resource_list_for_each_entry(rentry, &resource_list)
resources[i++] = *rentry->res;
pdev = platform_device_register_simple("wdat_wdt", PLATFORM_DEVID_NONE,
resources, nresources);
if (IS_ERR(pdev))
pr_err("Device creation failed: %ld\n", PTR_ERR(pdev));
kfree(resources);
fail_free_resource_list:
resource_list_free(&resource_list);
}
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