linux-kernel - Re: [2.6.25-rc5-mm1] WARNING: at drivers/base/sys.c:173

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Message-ID: <20080313183439.GA12798@suse.de>
Date:	Thu, 13 Mar 2008 11:34:39 -0700
From:	Greg KH <gregkh@...e.de>
To:	Tilman Schmidt <tilman@...p.cc>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Dave Jones <davej@...emonkey.org.uk>
Subject: Re: [2.6.25-rc5-mm1] WARNING: at drivers/base/sys.c:173

On Thu, Mar 13, 2008 at 01:15:52AM +0100, Tilman Schmidt wrote:
> Am 11.03.2008 09:14 schrieb Andrew Morton:
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.25-rc5/2.6.25-rc5-mm1/
> 
> Late during boot, this issues the following warning on my Pentium D,
> apparently when trying to load an appropriate CPU frequency driver:
> 
> [   56.759128] ------------[ cut here ]------------
> [   56.765058] WARNING: at drivers/base/sys.c:173 sysdev_driver_register+0x34/0xce()
> [   56.776027] Modules linked in: acpi_cpufreq(+) speedstep_lib ip6table_filter ip6_tables x_tables ipv6 microcode firmware_class loop osst st sr_mod cdrom pata_acpi bas_gigaset snd_hda_intel gigaset isdn snd_pcm ata_generic<6>ip_tables: (C) 2000-2006 Netfilter Core Team
> [   56.785293]  snd_timer aic7xxx slhc snd ohci1394 rtc_cmos ieee1394 shpchp crc_ccitt iTCO_wdt e1000e rtc_core iTCO_vendor_support soundcore scsi_transport_spi watchdog_core pci_hotplug intel_agp button thermal agpgart rtc_lib processor i2c_i801 watchdog_dev parport_pc i2c_core snd_page_alloc parport pata_marvell sg ext3 jbd mbcache linear sd_mod usbhid hid ff_memless ahci libata scsi_mod ehci_hcd uhci_hcd usbcore dm_snapshot dm_mod
> [   56.805358] Pid: 2856, comm: modprobe Not tainted 2.6.25-rc5-mm1-testing #1
> [   56.810766]  [<c01272e9>] warn_on_slowpath+0x41/0x6d
> [   56.820628]  [<c0230065>] ? acpi_ns_lookup+0x2b5/0x497
> [   56.830455]  [<c0230e25>] ? acpi_evaluate_object+0x23e/0x249
> [   56.840414]  [<c02ff809>] ? mutex_unlock+0x8/0xa
> [   56.848380]  [<fa9fec1d>] ? acpi_processor_preregister_performance+0x4e6/0x4f1 [processor]
> [   56.858297]  [<c0286438>] ? cpufreq_register_driver+0x42/0xfc
> [   56.868263]  [<c026423d>] sysdev_driver_register+0x34/0xce
> [   56.877974]  [<c0286476>] cpufreq_register_driver+0x80/0xfc
> [   56.887327]  [<facde034>] acpi_cpufreq_init+0x34/0x3a [acpi_cpufreq]
> [   56.897290]  [<c014ad7a>] sys_init_module+0x1816/0x1943
> [   56.907304]  [<facb5000>] ? icmp_checkentry+0x0/0x14 [ip_tables]
> [   56.917255]  [<c0183cd2>] ? sys_read+0x3b/0x60
> [   56.925094]  [<c0106aec>] sysenter_past_esp+0x6d/0xc5
> [   56.935071]  =======================
> [   56.945016] ---[ end trace 9ade9adb26b6da0a ]---
> 
> Looking back, -rc3-mm1 did that too.
> Mainline (-rc3 through -rc5) never did.
> Let me know if you need more information.
> CCing Dave Jones for cpufreq and Greg KH for sysdev.

This implys that a cpufreq module is getting registered twice in the
sysdev code :(

thanks,

greg k-h
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