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Date: Tue, 13 Oct 2009 14:40:45 +0200 From: Arnd Bergmann <arndbergmann@...glemail.com> To: Frederic Weisbecker <fweisbec@...il.com> Cc: Arnd Bergmann <arndbergmann@...glemail.com>, Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>, Vincent Sanders <vince@...tec.co.uk>, John Kacur <jkacur@...hat.com>, Jonathan Corbet <corbet@....net>, Christoph Hellwig <hch@...radead.org>, "Sven-Thorsten Dietrich" <sven@...bigcorporation.com>, Alessio Igor Bogani <abogani@...ware.it>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Greg KH <gregkh@...e.de> Subject: Re: [patch 11/28] nvram: Drop the bkl from nvram_llseek() On Monday 12 October 2009, Frederic Weisbecker wrote: > On Sun, Oct 11, 2009 at 11:50:24PM +0200, Arnd Bergmann wrote: > > > > There are various *_operations structures that have a .ioctl pointer. > > While there are a lot of struct file_operations with a locked .ioctl > > operation, stuff like block_device_operations does not hold the > > BKL in .ioctl but in .locked_ioctl. > > Oh right. Thanks for the tip. > FWIW, I've done a grep through the current source tree, this should be the full list of all .ioctl methods in struct file_operations, a total of 141 instances in 2.6.32-rc4. When we do a pushdown of the BKL into these functions, we can kill off the file operation. Arnd <>< arch/blackfin/mach-bf561/coreb.c: .ioctl = coreb_ioctl, arch/cris/arch-v10/drivers/ds1302.c: .ioctl = rtc_ioctl, arch/cris/arch-v10/drivers/gpio.c: .ioctl = gpio_ioctl, arch/cris/arch-v10/drivers/i2c.c: .ioctl = i2c_ioctl, arch/cris/arch-v10/drivers/pcf8563.c: .ioctl = pcf8563_ioctl, arch/cris/arch-v10/drivers/sync_serial.c: .ioctl = sync_serial_ioctl, arch/cris/arch-v32/drivers/cryptocop.c: .ioctl = cryptocop_ioctl arch/cris/arch-v32/drivers/i2c.c: .ioctl = i2c_ioctl, arch/cris/arch-v32/drivers/mach-a3/gpio.c: .ioctl = gpio_ioctl, arch/cris/arch-v32/drivers/mach-fs/gpio.c: .ioctl = gpio_ioctl, arch/cris/arch-v32/drivers/pcf8563.c: .ioctl = pcf8563_ioctl arch/cris/arch-v32/drivers/sync_serial.c: .ioctl = sync_serial_ioctl, arch/ia64/kernel/perfmon.c: .ioctl = pfm_ioctl, arch/ia64/sn/kernel/sn2/sn_hwperf.c: .ioctl = sn_hwperf_ioctl, arch/m68k/bvme6000/rtc.c: .ioctl = rtc_ioctl, arch/m68k/mvme16x/rtc.c: .ioctl = rtc_ioctl, arch/powerpc/kernel/nvram_64.c: .ioctl = dev_nvram_ioctl, arch/sh/boards/mach-landisk/gio.c: .ioctl = gio_ioctl, /* ioctl */ arch/um/drivers/harddog_kern.c: .ioctl = harddog_ioctl, arch/um/drivers/hostaudio_kern.c: .ioctl = hostaudio_ioctl, arch/um/drivers/mmapper_kern.c: .ioctl = mmapper_ioctl, drivers/block/pktcdvd.c: .ioctl = pkt_ctl_ioctl, drivers/bluetooth/hci_vhci.c: .ioctl = vhci_ioctl, drivers/char/apm-emulation.c: .ioctl = apm_ioctl, drivers/char/applicom.c: .ioctl = ac_ioctl, drivers/char/ds1620.c: .ioctl = ds1620_ioctl, drivers/char/dtlk.c: .ioctl = dtlk_ioctl, drivers/char/nvram.c: .ioctl = nvram_ioctl, drivers/char/generic_nvram.c: .ioctl = nvram_ioctl, drivers/char/genrtc.c: .ioctl = gen_rtc_ioctl, drivers/char/hpet.c: .ioctl = hpet_ioctl, drivers/char/i8k.c: .ioctl = i8k_ioctl, drivers/char/ipmi/ipmi_devintf.c: .ioctl = ipmi_ioctl, drivers/char/ipmi/ipmi_watchdog.c: .ioctl = ipmi_ioctl, drivers/char/istallion.c: .ioctl = stli_memioctl, drivers/char/lp.c: .ioctl = lp_ioctl, drivers/char/nwflash.c: .ioctl = flash_ioctl, drivers/char/raw.c: .ioctl = raw_ioctl, drivers/char/sonypi.c: .ioctl = sonypi_misc_ioctl, drivers/char/stallion.c: .ioctl = stl_memioctl, drivers/char/toshiba.c: .ioctl = tosh_ioctl, drivers/gpu/drm/i810/i810_dma.c: .ioctl = drm_ioctl, drivers/gpu/drm/i810/i810_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/i830/i830_dma.c: .ioctl = drm_ioctl, drivers/gpu/drm/i830/i830_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/i915/i915_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/mga/mga_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/r128/r128_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/radeon/radeon_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/radeon/radeon_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/savage/savage_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/sis/sis_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/tdfx/tdfx_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/via/via_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/i810/i810_dma.c: .ioctl = drm_ioctl, drivers/gpu/drm/i810/i810_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/i830/i830_dma.c: .ioctl = drm_ioctl, drivers/gpu/drm/i830/i830_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/i915/i915_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/mga/mga_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/r128/r128_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/radeon/radeon_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/radeon/radeon_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/savage/savage_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/sis/sis_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/tdfx/tdfx_drv.c: .ioctl = drm_ioctl, drivers/gpu/drm/via/via_drv.c: .ioctl = drm_ioctl, drivers/hwmon/fschmd.c: .ioctl = watchdog_ioctl, drivers/ide/ide-tape.c: .ioctl = idetape_chrdev_ioctl, drivers/input/misc/hp_sdc_rtc.c: .ioctl = hp_sdc_rtc_ioctl, drivers/isdn/capi/capi.c: .ioctl = capi_ioctl, drivers/isdn/divert/divert_procfs.c: .ioctl = isdn_divert_ioctl, drivers/isdn/i4l/isdn_common.c: .ioctl = isdn_ioctl, drivers/isdn/mISDN/timerdev.c: .ioctl = mISDN_ioctl, drivers/macintosh/ans-lcd.c: .ioctl = anslcd_ioctl, drivers/macintosh/nvram.c: .ioctl = nvram_ioctl, drivers/macintosh/via-pmu.c: .ioctl = pmu_ioctl, drivers/media/dvb/dvb-core/dmxdev.c: .ioctl = dvb_demux_ioctl, drivers/media/dvb/dvb-core/dmxdev.c: .ioctl = dvb_dvr_ioctl, drivers/media/dvb/dvb-core/dvb_ca_en50221.c: .ioctl = dvb_ca_en50221_io_ioctl, drivers/media/dvb/dvb-core/dvb_net.c: .ioctl = dvb_net_ioctl, drivers/media/dvb/dvb-core/dvb_frontend.c: .ioctl = dvb_generic_ioctl, drivers/media/dvb/firewire/firedtv-ci.c: .ioctl = dvb_generic_ioctl, drivers/media/dvb/ttpci/av7110.c: .ioctl = dvb_generic_ioctl, drivers/media/dvb/ttpci/av7110_av.c: .ioctl = dvb_generic_ioctl, drivers/media/dvb/ttpci/av7110_av.c: .ioctl = dvb_generic_ioctl, drivers/media/dvb/ttpci/av7110_ca.c: .ioctl = dvb_generic_ioctl, drivers/message/i2o/i2o_config.c: .ioctl = i2o_cfg_ioctl, drivers/mtd/mtdchar.c: .ioctl = mtd_ioctl, drivers/net/wan/cosa.c: .ioctl = cosa_chardev_ioctl, drivers/parisc/eisa_eeprom.c: .ioctl = eisa_eeprom_ioctl, drivers/pcmcia/pcmcia_ioctl.c: .ioctl = ds_ioctl, drivers/rtc/rtc-m41t80.c: .ioctl = wdt_ioctl, drivers/s390/char/tape_char.c: .ioctl = tapechar_ioctl, drivers/s390/char/vmwatchdog.c: .ioctl = &vmwdt_ioctl, drivers/sbus/char/openprom.c: .ioctl = openprom_ioctl, drivers/scsi/3w-9xxx.c: .ioctl = twa_chrdev_ioctl, drivers/scsi/3w-xxxx.c: .ioctl = tw_chrdev_ioctl, drivers/scsi/aacraid/linit.c: .ioctl = aac_cfg_ioctl, drivers/scsi/dpt_i2o.c: .ioctl = adpt_ioctl, drivers/scsi/gdth.c: .ioctl = gdth_ioctl, drivers/scsi/megaraid.c: .ioctl = megadev_ioctl, drivers/scsi/megaraid/megaraid_mm.c: .ioctl = mraid_mm_ioctl, drivers/scsi/osst.c: .ioctl = osst_ioctl, drivers/scsi/sg.c: .ioctl = sg_ioctl, drivers/staging/comedi/comedi_fops.c: .ioctl = comedi_ioctl, drivers/staging/poch/poch.c: .ioctl = poch_ioctl, drivers/staging/sep/sep_driver.c: .ioctl = sep_ioctl, drivers/staging/vme/devices/vme_user.c: .ioctl = vme_user_ioctl, drivers/usb/core/devio.c: .ioctl = usbdev_ioctl, drivers/usb/mon/mon_bin.c: .ioctl = mon_bin_ioctl, fs/autofs/root.c: .ioctl = autofs_root_ioctl, fs/autofs4/root.c: .ioctl = autofs4_root_ioctl, fs/coda/pioctl.c: .ioctl = coda_pioctl, fs/coda/psdev.c: .ioctl = coda_psdev_ioctl, fs/ecryptfs/file.c: .ioctl = ecryptfs_ioctl, fs/ecryptfs/file.c: .ioctl = ecryptfs_ioctl, fs/fat/dir.c: .ioctl = fat_dir_ioctl, fs/fat/file.c: .ioctl = fat_generic_ioctl, fs/hfsplus/dir.c: .ioctl = hfsplus_ioctl, fs/hfsplus/inode.c: .ioctl = hfsplus_ioctl, fs/ncpfs/dir.c: .ioctl = ncp_ioctl, fs/ncpfs/file.c: .ioctl = ncp_ioctl, fs/reiserfs/dir.c: .ioctl = reiserfs_ioctl, fs/reiserfs/file.c: .ioctl = reiserfs_ioctl, fs/smbfs/dir.c: .ioctl = smb_ioctl, fs/smbfs/file.c: .ioctl = smb_ioctl, fs/udf/dir.c: .ioctl = udf_ioctl, fs/udf/file.c: .ioctl = udf_ioctl, net/sunrpc/cache.c: .ioctl = cache_ioctl_procfs, /* for FIONREAD */ net/sunrpc/cache.c: .ioctl = cache_ioctl_pipefs, /* for FIONREAD */ net/sunrpc/rpc_pipe.c: .ioctl = rpc_pipe_ioctl, sound/oss/dmasound/dmasound_core.c: .ioctl = mixer_ioctl, sound/oss/dmasound/dmasound_core.c: .ioctl = sq_ioctl, sound/oss/msnd_pinnacle.c: .ioctl = dev_ioctl, sound/oss/sh_dac_audio.c: .ioctl = dac_audio_ioctl, sound/oss/soundcard.c: .ioctl = sound_ioctl, sound/oss/swarm_cs4297a.c: .ioctl = cs4297a_ioctl_mixdev, sound/oss/swarm_cs4297a.c: .ioctl = cs4297a_ioctl, sound/oss/vwsnd.c: .ioctl = vwsnd_audio_ioctl, sound/oss/vwsnd.c: .ioctl = vwsnd_mixer_ioctl, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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