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From: Boaz Harrosh <openosd@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-kernel@vger.kernel.org, John Kacur <jkacur@redhat.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Christoph Hellwig <hch@lst.de>, Julia Lawall <julia@diku.dk>,
	Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 16/18] llseek: automatically add .llseek fop
Date: Thu, 08 Jul 2010 15:17:58 +0300	[thread overview]
Message-ID: <4C35C1F6.70902@gmail.com> (raw)
In-Reply-To: <1278538820-1392-17-git-send-email-arnd@arndb.de>

On 07/08/2010 12:40 AM, Arnd Bergmann wrote:
> All file_operations should get a .llseek
> operation so we can make nonseekable_open
> the default for future file operations
> without a .llseek pointer.
> 
> The three cases that we can automatically
> detect are no_llseek, seq_lseek and
> default_llseek. For cases where we can
> we can automatically prove that the
> file offset is always ignored, we use
> noop_llseek, which maintains the current
> behavior of not returning an error from
> a seek.
> 
> New drivers should normally not use
> noop_llseek but instead use no_llseek and
> call nonseekable_open at open time.
> Existing drivers can be converted to do
> the same when the maintainer knows for
> certain that no user code relies on calling
> seek on the device file.
> 
> The generated code is often incorrectly
> indented and right now contains comments that
> clarify for each added line why a specific
> variant was chosen. In the version that gets
> submitted upstream, the comments will be gone
> and I will manually fix the indentation,
> because there does not seem to be a way to
> do that using coccinelle.
> 
> Some amount of new code is currently sitting
> in linux-next that should get the same
> modifications, which I will do at the end of
> the merge window.
> 
> This specific posted version of the patch only
> covers first few files in order to avoid
> spamming everybody's inbox. I think you still
> get the point. The diffstat is complete, and
> the full patch is available in the 'llseek'
> branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl.git
> 
> Many thanks to Julia Lawall for helping me
> learn to write a semantic patch that does
> all this.
> 
> ===== begin semantic patch =====
> // This adds an llseek= method to all file operations,
> // as a preparation for making no_llseek the default.
> //
> // The rules are
> // - use no_llseek explicitly if we do nonseekable_open
> // - use seq_lseek for sequential files
> // - use default_llseek if we know we access f_pos
> // - use noop_llseek if we know we don't access f_pos,
> //   but we still want to allow users to call lseek
> //
> @ open1 exists @
> identifier nested_open;
> @@
> nested_open(...)
> {
> <+...
> nonseekable_open(...)
> ...+>
> }
> 
> @ open exists@
> identifier open_f;
> identifier i, f;
> identifier open1.nested_open;
> @@
> int open_f(struct inode *i, struct file *f)
> {
> <+...
> (
> nonseekable_open(...)
> |
> nested_open(...)
> )
> ...+>
> }
> 
> @ read disable optional_qualifier exists @
> identifier read_f;
> identifier f, p, s, off;
> type ssize_t, size_t, loff_t;
> expression E;
> identifier func;
> @@
> ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
> {
> <+...
> (
>    *off = E
> |
>    *off += E
> |
>    func(..., off, ...)
> |
>    E = *off
> )
> ...+>
> }
> 
> @ read_no_fpos disable optional_qualifier exists @
> identifier read_f;
> identifier f, p, s, off;
> type ssize_t, size_t, loff_t;
> @@
> ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
> {
> ... when != off
> }
> 
> @ write @
> identifier write_f;
> identifier f, p, s, off;
> type ssize_t, size_t, loff_t;
> expression E;
> identifier func;
> @@
> ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
> {
> <+...
> (
>   *off = E
> |
>   *off += E
> |
>   func(..., off, ...)
> |
>   E = *off
> )
> ...+>
> }
> 
> @ write_no_fpos @
> identifier write_f;
> identifier f, p, s, off;
> type ssize_t, size_t, loff_t;
> @@
> ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
> {
> ... when != off
> }
> 
> @ fops0 @
> identifier fops;
> @@
> struct file_operations fops = {
>  ...
> };
> 
> @ has_llseek depends on fops0 @
> identifier fops0.fops;
> identifier llseek_f;
> @@
> struct file_operations fops = {
> ...
>  .llseek = llseek_f,
> ...
> };
> 
> @ has_read depends on fops0 @
> identifier fops0.fops;
> identifier read_f;
> @@
> struct file_operations fops = {
> ...
>  .read = read_f,
> ...
> };
> 
> @ has_write depends on fops0 @
> identifier fops0.fops;
> identifier write_f;
> @@
> struct file_operations fops = {
> ...
>  .write = write_f,
> ...
> };
> 
> @ has_open depends on fops0 @
> identifier fops0.fops;
> identifier open_f;
> @@
> struct file_operations fops = {
> ...
>  .open = open_f,
> ...
> };
> 
> // use no_llseek if we call nonseekable_open
> ////////////////////////////////////////////
> @ nonseekable1 depends on !has_llseek && has_open @
> identifier fops0.fops;
> identifier nso ~= "nonseekable_open";
> @@
> struct file_operations fops = {
> ...  .open = nso, ...
> +.llseek = no_llseek, /* nonseekable */
> };
> 
> @ nonseekable2 depends on !has_llseek @
> identifier fops0.fops;
> identifier open.open_f;
> @@
> struct file_operations fops = {
> ...  .open = open_f, ...
> +.llseek = no_llseek, /* open uses nonseekable */
> };
> 
> // use seq_lseek for sequential files
> /////////////////////////////////////
> @ seq depends on !has_llseek @
> identifier fops0.fops;
> identifier sr ~= "seq_read";
> @@
> struct file_operations fops = {
> ...  .read = sr, ...
> +.llseek = seq_lseek, /* we have seq_read */
> };
> 
> // use default_llseek if there is a readdir
> ///////////////////////////////////////////
> @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
> identifier fops0.fops;
> identifier readdir_e;
> @@
> // any other fop is used that changes pos
> struct file_operations fops = {
> ... .readdir = readdir_e, ...
> +.llseek = default_llseek, /* readdir is present */
> };
> 
> // use default_llseek if at least one of read/write touches f_pos
> /////////////////////////////////////////////////////////////////
> @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
> identifier fops0.fops;
> identifier read.read_f;
> @@
> // read fops use offset
> struct file_operations fops = {
> ... .read = read_f, ...
> +.llseek = default_llseek, /* read accesses f_pos */
> };
> 
> @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
> identifier fops0.fops;
> identifier write.write_f;
> @@
> // write fops use offset
> struct file_operations fops = {
> ... .write = write_f, ...
> +	.llseek = default_llseek, /* write accesses f_pos */
> };
> 
> // Use noop_llseek if neither read nor write accesses f_pos
> ///////////////////////////////////////////////////////////
> 
> @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
> identifier fops0.fops;
> identifier read_no_fpos.read_f;
> identifier write_no_fpos.write_f;
> @@
> // write fops use offset
> struct file_operations fops = {
> ...
>  .write = write_f,
>  .read = read_f,
> ...
> +.llseek = noop_llseek, /* read and write both use no f_pos */
> };
> 
> @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
> identifier fops0.fops;
> identifier write_no_fpos.write_f;
> @@
> struct file_operations fops = {
> ... .write = write_f, ...
> +.llseek = noop_llseek, /* write uses no f_pos */
> };
> 
> @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
> identifier fops0.fops;
> identifier read_no_fpos.read_f;
> @@
> struct file_operations fops = {
> ... .read = read_f, ...
> +.llseek = noop_llseek, /* read uses no f_pos */
> };
> 
> @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
> identifier fops0.fops;
> @@
> struct file_operations fops = {
> ...
> +.llseek = noop_llseek, /* no read or write fn */
> };
> ===== End semantic patch =====
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Cc: Julia Lawall <julia@diku.dk>
> Cc: Christoph Hellwig <hch@infradead.org>
> ---
>  arch/arm/kernel/etm.c                         |    1 +
>  arch/arm/mach-msm/last_radio_log.c            |    3 +-
>  arch/arm/mach-msm/smd_debug.c                 |    1 +
>  arch/arm/plat-mxc/audmux-v2.c                 |    1 +
>  arch/avr32/boards/mimc200/fram.c              |    1 +
>  arch/blackfin/kernel/kgdb_test.c              |    1 +
>  arch/blackfin/mach-bf561/coreb.c              |    1 +
>  arch/cris/arch-v10/drivers/ds1302.c           |    1 +
>  arch/cris/arch-v10/drivers/gpio.c             |    1 +
>  arch/cris/arch-v10/drivers/i2c.c              |    1 +
>  arch/cris/arch-v10/drivers/pcf8563.c          |    1 +
>  arch/cris/arch-v10/drivers/sync_serial.c      |    3 +-
>  arch/cris/arch-v32/drivers/cryptocop.c        |    3 +-
>  arch/cris/arch-v32/drivers/i2c.c              |    1 +
>  arch/cris/arch-v32/drivers/mach-a3/gpio.c     |    1 +
>  arch/cris/arch-v32/drivers/mach-fs/gpio.c     |    1 +
>  arch/cris/arch-v32/drivers/pcf8563.c          |    1 +
>  arch/cris/arch-v32/drivers/sync_serial.c      |    3 +-
>  arch/cris/kernel/profile.c                    |    1 +
>  arch/ia64/kernel/salinfo.c                    |    2 +
>  arch/ia64/sn/kernel/sn2/sn_hwperf.c           |    1 +
>  arch/m68k/bvme6000/rtc.c                      |    1 +
>  arch/m68k/mvme16x/rtc.c                       |    1 +
>  arch/mips/kernel/rtlx.c                       |    3 +-
>  arch/mips/kernel/vpe.c                        |    3 +-
>  arch/mips/sibyte/common/sb_tbprof.c           |    1 +
>  arch/powerpc/kernel/lparcfg.c                 |    1 +
>  arch/powerpc/kernel/rtas_flash.c              |    3 ++
>  arch/powerpc/kernel/rtasd.c                   |    1 +
>  arch/powerpc/platforms/iseries/mf.c           |    1 +
>  arch/powerpc/platforms/pseries/reconfig.c     |    3 +-
>  arch/powerpc/platforms/pseries/scanlog.c      |    1 +
>  arch/s390/crypto/prng.c                       |    1 +
>  arch/s390/hypfs/hypfs_diag.c                  |    1 +
>  arch/s390/hypfs/hypfs_vm.c                    |    1 +
>  arch/s390/hypfs/inode.c                       |    1 +
>  arch/s390/kernel/debug.c                      |    1 +
>  arch/sh/boards/mach-landisk/gio.c             |    1 +
>  arch/sparc/kernel/apc.c                       |    1 +
>  arch/sparc/kernel/mdesc.c                     |    1 +
>  arch/um/drivers/harddog_kern.c                |    1 +
>  arch/um/drivers/mconsole_kern.c               |    1 +
>  arch/um/drivers/mmapper_kern.c                |    1 +
>  arch/um/drivers/random.c                      |    1 +
>  arch/x86/kernel/apm_32.c                      |    1 +
>  arch/x86/kernel/cpu/mcheck/mce-severity.c     |    1 +
>  arch/x86/kernel/cpu/mcheck/mce.c              |    1 +
>  arch/x86/kernel/kdebugfs.c                    |    1 +
>  arch/x86/kernel/microcode_core.c              |    1 +
>  arch/x86/xen/debugfs.c                        |    1 +
>  block/bsg.c                                   |    1 +
>  drivers/acpi/debug.c                          |    1 +
>  drivers/acpi/event.c                          |    1 +
>  drivers/acpi/system.c                         |    2 +
>  drivers/block/DAC960.c                        |    3 +-
>  drivers/block/aoe/aoechr.c                    |    1 +
>  drivers/block/paride/pg.c                     |    1 +
>  drivers/block/paride/pt.c                     |    1 +
>  drivers/block/pktcdvd.c                       |    1 +
>  drivers/bluetooth/btmrvl_debugfs.c            |   10 +++++++
>  drivers/bluetooth/hci_vhci.c                  |    1 +
>  drivers/char/apm-emulation.c                  |    1 +
>  drivers/char/bfin-otp.c                       |    1 +
>  drivers/char/briq_panel.c                     |    1 +
>  drivers/char/bsr.c                            |    1 +
>  drivers/char/cs5535_gpio.c                    |    3 +-
>  drivers/char/ds1302.c                         |    1 +
>  drivers/char/ds1620.c                         |    1 +
>  drivers/char/dsp56k.c                         |    1 +
>  drivers/char/dtlk.c                           |    1 +
>  drivers/char/genrtc.c                         |    1 +
>  drivers/char/hw_random/core.c                 |    1 +
>  drivers/char/ip2/ip2main.c                    |    1 +
>  drivers/char/ipmi/ipmi_devintf.c              |    1 +
>  drivers/char/ipmi/ipmi_watchdog.c             |    1 +
>  drivers/char/istallion.c                      |    1 +
>  drivers/char/lp.c                             |    1 +
>  drivers/char/mem.c                            |    3 ++
>  drivers/char/misc.c                           |    1 +
>  drivers/char/mmtimer.c                        |    1 +
>  drivers/char/mspec.c                          |    9 ++++--
>  drivers/char/mwave/mwavedd.c                  |    3 +-
>  drivers/char/nwbutton.c                       |    1 +
>  drivers/char/pc8736x_gpio.c                   |    1 +
>  drivers/char/pcmcia/cm4000_cs.c               |    1 +
>  drivers/char/pcmcia/cm4040_cs.c               |    1 +
>  drivers/char/random.c                         |    2 +
>  drivers/char/rio/rio_linux.c                  |    1 +
>  drivers/char/scx200_gpio.c                    |    1 +
>  drivers/char/snsc.c                           |    1 +
>  drivers/char/stallion.c                       |    1 +
>  drivers/char/sx.c                             |    1 +
>  drivers/char/sysrq.c                          |    1 +
>  drivers/char/tb0219.c                         |    1 +
>  drivers/char/tlclk.c                          |    1 +
>  drivers/char/toshiba.c                        |    1 +
>  drivers/char/uv_mmtimer.c                     |    1 +
>  drivers/char/virtio_console.c                 |    3 ++
>  drivers/char/xilinx_hwicap/xilinx_hwicap.c    |    1 +
>  drivers/dma/coh901318.c                       |    1 +
>  drivers/gpu/drm/drm_drv.c                     |    3 +-
>  drivers/gpu/drm/i810/i810_dma.c               |    1 +
>  drivers/gpu/drm/i830/i830_dma.c               |    1 +
>  drivers/gpu/drm/i915/i915_debugfs.c           |    1 +
>  drivers/gpu/vga/vgaarb.c                      |    1 +
>  drivers/hid/hid-debug.c                       |    1 +
>  drivers/hid/hid-roccat.c                      |    1 +
>  drivers/hid/hidraw.c                          |    1 +
>  drivers/hid/usbhid/hiddev.c                   |    1 +
>  drivers/hwmon/asus_atk0110.c                  |    1 +
>  drivers/ide/ide-tape.c                        |    1 +
>  drivers/idle/i7300_idle.c                     |    1 +
>  drivers/infiniband/hw/cxgb4/device.c          |    1 +
>  drivers/infiniband/hw/ipath/ipath_diag.c      |    4 ++-
>  drivers/infiniband/hw/ipath/ipath_file_ops.c  |    3 +-
>  drivers/infiniband/hw/ipath/ipath_fs.c        |    3 ++
>  drivers/infiniband/hw/qib/qib_diag.c          |    4 ++-
>  drivers/infiniband/hw/qib/qib_file_ops.c      |    3 +-
>  drivers/infiniband/hw/qib/qib_fs.c            |    1 +
>  drivers/input/evdev.c                         |    3 +-
>  drivers/input/input.c                         |    1 +
>  drivers/input/joydev.c                        |    1 +
>  drivers/input/misc/uinput.c                   |    1 +
>  drivers/input/mousedev.c                      |    1 +
>  drivers/input/serio/serio_raw.c               |    1 +
>  drivers/isdn/mISDN/timerdev.c                 |    1 +
>  drivers/lguest/lguest_user.c                  |    1 +
>  drivers/macintosh/ans-lcd.c                   |    1 +
>  drivers/macintosh/via-pmu.c                   |    1 +
>  drivers/md/dm-ioctl.c                         |    1 +
>  drivers/media/IR/imon.c                       |    6 +++-
>  drivers/media/dvb/bt8xx/dst_ca.c              |    3 +-
>  drivers/media/dvb/dvb-core/dmxdev.c           |    2 +
>  drivers/media/dvb/dvb-core/dvb_ca_en50221.c   |    1 +
>  drivers/media/dvb/dvb-core/dvb_frontend.c     |    3 +-
>  drivers/media/dvb/dvb-core/dvb_net.c          |    1 +
>  drivers/media/dvb/dvb-core/dvbdev.c           |    1 +
>  drivers/media/dvb/firewire/firedtv-ci.c       |    1 +
>  drivers/media/dvb/ttpci/av7110.c              |    1 +
>  drivers/media/dvb/ttpci/av7110_av.c           |    2 +
>  drivers/media/dvb/ttpci/av7110_ca.c           |    1 +
>  drivers/media/dvb/ttpci/av7110_ir.c           |    1 +
>  drivers/mfd/ab3100-core.c                     |    1 +
>  drivers/misc/hpilo.c                          |    1 +
>  drivers/misc/phantom.c                        |    1 +
>  drivers/misc/sgi-gru/grufile.c                |    1 +
>  drivers/mmc/core/debugfs.c                    |    1 +
>  drivers/mtd/ubi/cdev.c                        |    1 +
>  drivers/net/cxgb4/cxgb4_main.c                |    1 +
>  drivers/net/ppp_generic.c                     |    3 +-
>  drivers/net/wimax/i2400m/debugfs.c            |    2 +
>  drivers/net/wireless/airo.c                   |   24 ++++++++++++------
>  drivers/net/wireless/ath/ath5k/debug.c        |    6 ++++
>  drivers/net/wireless/ath/ath9k/debug.c        |   33 ++++++++++++++++--------
>  drivers/net/wireless/ath/ath9k/htc_drv_main.c |    9 ++++--
>  drivers/net/wireless/iwlwifi/iwl-3945-rs.c    |    1 +
>  drivers/net/wireless/iwlwifi/iwl-agn-rs.c     |    3 ++
>  drivers/net/wireless/iwmc3200wifi/debugfs.c   |    4 +++
>  drivers/net/wireless/iwmc3200wifi/sdio.c      |    1 +
>  drivers/net/wireless/libertas/debugfs.c       |    1 +
>  drivers/net/wireless/ray_cs.c                 |    2 +
>  drivers/net/wireless/rt2x00/rt2x00debug.c     |    4 +++
>  drivers/net/wireless/wl12xx/wl1251_debugfs.c  |    2 +
>  drivers/net/wireless/wl12xx/wl1271_debugfs.c  |    4 ++-
>  drivers/oprofile/oprofile_files.c             |    8 +++++-
>  drivers/oprofile/oprofilefs.c                 |    3 ++
>  drivers/pci/pcie/aer/aer_inject.c             |    1 +
>  drivers/pcmcia/pcmcia_ioctl.c                 |    1 +
>  drivers/platform/x86/sony-laptop.c            |    1 +
>  drivers/rtc/rtc-m41t80.c                      |    1 +
>  drivers/s390/block/dasd_eer.c                 |    1 +
>  drivers/s390/char/fs3270.c                    |    1 +
>  drivers/s390/char/monreader.c                 |    1 +
>  drivers/s390/char/monwriter.c                 |    1 +
>  drivers/s390/char/tape_char.c                 |    1 +
>  drivers/s390/char/vmcp.c                      |    1 +
>  drivers/s390/char/vmlogrdr.c                  |    1 +
>  drivers/s390/char/vmwatchdog.c                |    1 +
>  drivers/s390/char/zcore.c                     |    2 +
>  drivers/s390/cio/chsc_sch.c                   |    1 +
>  drivers/s390/cio/css.c                        |    1 +
>  drivers/s390/crypto/zcrypt_api.c              |    3 +-
>  drivers/s390/scsi/zfcp_cfdc.c                 |    3 +-
>  drivers/sbus/char/display7seg.c               |    1 +
>  drivers/sbus/char/envctrl.c                   |    1 +
>  drivers/scsi/3w-9xxx.c                        |    3 +-
>  drivers/scsi/3w-sas.c                         |    3 +-
>  drivers/scsi/3w-xxxx.c                        |    3 +-
>  drivers/scsi/aacraid/linit.c                  |    1 +
>  drivers/scsi/ch.c                             |    1 +
>  drivers/scsi/dpt_i2o.c                        |    1 +
>  drivers/scsi/gdth.c                           |    1 +
>  drivers/scsi/megaraid.c                       |    1 +
>  drivers/scsi/megaraid/megaraid_mm.c           |    1 +
>  drivers/scsi/megaraid/megaraid_sas.c          |    1 +
>  drivers/scsi/mpt2sas/mpt2sas_ctl.c            |    1 +
>  drivers/scsi/osd/osd_uld.c                    |    1 +
>  drivers/scsi/pmcraid.c                        |    1 +
>  drivers/scsi/qla2xxx/qla_os.c                 |    1 +
>  drivers/scsi/scsi_tgt_if.c                    |    1 +
>  drivers/scsi/sg.c                             |    1 +
>  drivers/spi/dw_spi.c                          |    1 +
>  drivers/spi/spidev.c                          |    1 +
>  drivers/staging/batman-adv/device.c           |    1 +
>  drivers/staging/comedi/comedi_fops.c          |    1 +
>  drivers/staging/crystalhd/crystalhd_lnx.c     |    1 +
>  drivers/staging/dream/camera/msm_camera.c     |    3 ++
>  drivers/staging/dream/pmem.c                  |    2 +
>  drivers/staging/dream/qdsp5/adsp_driver.c     |    1 +
>  drivers/staging/dream/qdsp5/audio_aac.c       |    1 +
>  drivers/staging/dream/qdsp5/audio_amrnb.c     |    1 +
>  drivers/staging/dream/qdsp5/audio_evrc.c      |    1 +
>  drivers/staging/dream/qdsp5/audio_in.c        |    2 +
>  drivers/staging/dream/qdsp5/audio_mp3.c       |    1 +
>  drivers/staging/dream/qdsp5/audio_out.c       |    2 +
>  drivers/staging/dream/qdsp5/audio_qcelp.c     |    1 +
>  drivers/staging/dream/qdsp5/evlog.h           |    1 +
>  drivers/staging/dream/qdsp5/snd.c             |    1 +
>  drivers/staging/dt3155/dt3155_drv.c           |    3 +-
>  drivers/staging/frontier/alphatrack.c         |    1 +
>  drivers/staging/frontier/tranzport.c          |    1 +
>  drivers/staging/iio/industrialio-core.c       |    1 +
>  drivers/staging/iio/industrialio-ring.c       |    1 +
>  drivers/staging/memrar/memrar_handler.c       |    1 +
>  drivers/staging/panel/panel.c                 |    1 +
>  drivers/staging/sep/sep_driver.c              |    1 +
>  drivers/telephony/ixj.c                       |    3 +-
>  drivers/telephony/phonedev.c                  |    1 +
>  drivers/uio/uio.c                             |    1 +
>  drivers/usb/class/cdc-wdm.c                   |    3 +-
>  drivers/usb/class/usblp.c                     |    1 +
>  drivers/usb/class/usbtmc.c                    |    1 +
>  drivers/usb/core/file.c                       |    1 +
>  drivers/usb/gadget/f_hid.c                    |    1 +
>  drivers/usb/gadget/printer.c                  |    3 +-
>  drivers/usb/host/ehci-dbg.c                   |    3 ++
>  drivers/usb/host/ohci-dbg.c                   |    3 ++
>  drivers/usb/image/mdc800.c                    |    1 +
>  drivers/usb/misc/adutux.c                     |    1 +
>  drivers/usb/misc/idmouse.c                    |    1 +
>  drivers/usb/misc/iowarrior.c                  |    1 +
>  drivers/usb/misc/ldusb.c                      |    1 +
>  drivers/usb/misc/rio500.c                     |    1 +
>  drivers/usb/misc/usblcd.c                     |    1 +
>  drivers/usb/usb-skeleton.c                    |    1 +
>  drivers/vhost/net.c                           |    1 +
>  drivers/video/fbmem.c                         |    1 +
>  drivers/video/mbx/mbxdebugfs.c                |    6 ++++
>  drivers/watchdog/ar7_wdt.c                    |    1 +
>  drivers/watchdog/cpwd.c                       |    1 +
>  drivers/watchdog/ep93xx_wdt.c                 |    1 +
>  drivers/watchdog/omap_wdt.c                   |    1 +
>  drivers/xen/evtchn.c                          |    1 +
>  drivers/xen/xenfs/super.c                     |    1 +
>  drivers/xen/xenfs/xenbus.c                    |    1 +
>  fs/afs/mntpt.c                                |    1 +
>  fs/autofs4/dev-ioctl.c                        |    1 +
>  fs/binfmt_misc.c                              |    3 ++
>  fs/btrfs/super.c                              |    1 +
>  fs/cachefiles/daemon.c                        |    1 +
>  fs/char_dev.c                                 |    1 +
>  fs/coda/pioctl.c                              |    1 +
>  fs/coda/psdev.c                               |    1 +
>  fs/debugfs/file.c                             |    3 ++
>  fs/dlm/debug_fs.c                             |    3 +-
>  fs/dlm/plock.c                                |    3 +-
>  fs/dlm/user.c                                 |    3 ++
>  fs/ecryptfs/file.c                            |    1 +
>  fs/ecryptfs/miscdev.c                         |    1 +
>  fs/eventfd.c                                  |    1 +
>  fs/eventpoll.c                                |    3 +-
>  fs/fifo.c                                     |    1 +
>  fs/fuse/control.c                             |    4 +++
>  fs/fuse/cuse.c                                |    1 +
>  fs/gfs2/file.c                                |    2 +
>  fs/hppfs/hppfs.c                              |    1 +
>  fs/hugetlbfs/inode.c                          |    1 +
>  fs/logfs/dir.c                                |    1 +
>  fs/nfsd/nfsctl.c                              |    1 +
>  fs/no-block.c                                 |    1 +
>  fs/notify/inotify/inotify_user.c              |    1 +
>  fs/ntfs/file.c                                |    3 +-
>  fs/ocfs2/dlmfs/dlmfs.c                        |    1 +
>  fs/ocfs2/stack_user.c                         |    1 +
>  fs/proc/base.c                                |    7 +++++
>  fs/proc/proc_sysctl.c                         |    1 +
>  fs/proc/root.c                                |    1 +
>  fs/proc/task_mmu.c                            |    1 +
>  fs/romfs/super.c                              |    1 +
>  fs/signalfd.c                                 |    1 +
>  fs/squashfs/dir.c                             |    3 +-
>  fs/timerfd.c                                  |    1 +
>  fs/ubifs/debug.c                              |    1 +
>  ipc/mqueue.c                                  |    1 +
>  ipc/shm.c                                     |    2 +
>  kernel/configs.c                              |    1 +
>  kernel/gcov/fs.c                              |    1 +
>  kernel/kprobes.c                              |    1 +
>  kernel/pm_qos_params.c                        |    1 +
>  kernel/profile.c                              |    1 +
>  kernel/trace/blktrace.c                       |    2 +
>  kernel/trace/ftrace.c                         |    2 +
>  kernel/trace/ring_buffer.c                    |    1 +
>  kernel/trace/trace_events.c                   |    7 +++++
>  kernel/trace/trace_ksym.c                     |    1 +
>  kernel/trace/trace_stack.c                    |    1 +
>  kernel/trace/trace_sysprof.c                  |    1 +
>  lib/dma-debug.c                               |    1 +
>  net/atm/proc.c                                |    1 +
>  net/dccp/probe.c                              |    1 +
>  net/ipv4/tcp_probe.c                          |    1 +
>  net/mac80211/debugfs.c                        |   19 ++++++++++----
>  net/mac80211/rate.c                           |    1 +
>  net/mac80211/rc80211_minstrel_debugfs.c       |    1 +
>  net/mac80211/rc80211_pid_debugfs.c            |    1 +
>  net/netfilter/xt_recent.c                     |    1 +
>  net/nonet.c                                   |    1 +
>  net/rfkill/core.c                             |    1 +
>  net/sctp/probe.c                              |    1 +
>  net/socket.c                                  |    1 +
>  net/sunrpc/cache.c                            |    2 +
>  net/wireless/debugfs.c                        |    1 +
>  samples/tracepoints/tracepoint-sample.c       |    1 +
>  security/inode.c                              |    1 +
>  security/smack/smackfs.c                      |    5 ++++
>  security/tomoyo/common.c                      |    1 +
>  sound/core/seq/oss/seq_oss.c                  |    1 +
>  sound/core/sound.c                            |    3 +-
>  sound/oss/au1550_ac97.c                       |    2 +
>  sound/oss/msnd_pinnacle.c                     |    1 +
>  sound/oss/sh_dac_audio.c                      |    1 +
>  sound/soc/soc-core.c                          |    1 +
>  sound/soc/soc-dapm.c                          |    1 +
>  sound/sound_core.c                            |    1 +
>  virt/kvm/kvm_main.c                           |    3 ++
>  335 files changed, 528 insertions(+), 69 deletions(-)
> 
> diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c
> index 8277539..88f48c7 100644
> --- a/arch/arm/kernel/etm.c
> +++ b/arch/arm/kernel/etm.c
> @@ -314,6 +314,7 @@ static const struct file_operations etb_fops = {
>  	.read = etb_read,
>  	.open = etb_open,
>  	.release = etb_release,
> +	.llseek = no_llseek,/* open uses nonseekable */
>  };
>  
>  static struct miscdevice etb_miscdev = {
> diff --git a/arch/arm/mach-msm/last_radio_log.c b/arch/arm/mach-msm/last_radio_log.c
> index b64ba5a..81058a3 100644
> --- a/arch/arm/mach-msm/last_radio_log.c
> +++ b/arch/arm/mach-msm/last_radio_log.c
> @@ -48,7 +48,8 @@ static ssize_t last_radio_log_read(struct file *file, char __user *buf,
>  }
>  
>  static struct file_operations last_radio_log_fops = {
> -	.read = last_radio_log_read
> +	.read = last_radio_log_read,
> +	.llseek = default_llseek,/* read accesses f_pos */
>  };
>  
>  void msm_init_last_radio_log(struct module *owner)
> diff --git a/arch/arm/mach-msm/smd_debug.c b/arch/arm/mach-msm/smd_debug.c
> index 3b2dd71..e01a1ef 100644
> --- a/arch/arm/mach-msm/smd_debug.c
> +++ b/arch/arm/mach-msm/smd_debug.c
> @@ -212,6 +212,7 @@ static int debug_open(struct inode *inode, struct file *file)
>  static const struct file_operations debug_ops = {
>  	.read = debug_read,
>  	.open = debug_open,
> +	.llseek = default_llseek,/* read accesses f_pos */
>  };
>  
>  static void debug_create(const char *name, mode_t mode,
> diff --git a/arch/arm/plat-mxc/audmux-v2.c b/arch/arm/plat-mxc/audmux-v2.c
> index 0c2cc5c..7de36c6 100644
> --- a/arch/arm/plat-mxc/audmux-v2.c
> +++ b/arch/arm/plat-mxc/audmux-v2.c
> @@ -141,6 +141,7 @@ static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
>  static const struct file_operations audmux_debugfs_fops = {
>  	.open = audmux_open_file,
>  	.read = audmux_read_file,
> +	.llseek = default_llseek,/* read accesses f_pos */
>  };
>  
>  static void audmux_debugfs_init(void)
> diff --git a/arch/avr32/boards/mimc200/fram.c b/arch/avr32/boards/mimc200/fram.c
> index 54fbd95..a34cf5d 100644
> --- a/arch/avr32/boards/mimc200/fram.c
> +++ b/arch/avr32/boards/mimc200/fram.c
> @@ -41,6 +41,7 @@ static int fram_mmap(struct file *filp, struct vm_area_struct *vma)
>  static const struct file_operations fram_fops = {
>  	.owner			= THIS_MODULE,
>  	.mmap			= fram_mmap,
> +	.llseek = noop_llseek,/* no read or write fn */
>  };
>  
>  #define FRAM_MINOR	0
> diff --git a/arch/blackfin/kernel/kgdb_test.c b/arch/blackfin/kernel/kgdb_test.c
> index 9a4b075..1a5fae7 100644
> --- a/arch/blackfin/kernel/kgdb_test.c
> +++ b/arch/blackfin/kernel/kgdb_test.c
> @@ -88,6 +88,7 @@ static const struct file_operations kgdb_test_proc_fops = {
>  	.owner = THIS_MODULE,
>  	.read  = kgdb_test_proc_read,
>  	.write = kgdb_test_proc_write,
> +	.llseek = noop_llseek,/* read and write both use no f_pos */
>  };
>  
>  static int __init kgdbtest_init(void)
> diff --git a/arch/blackfin/mach-bf561/coreb.c b/arch/blackfin/mach-bf561/coreb.c
> index deb2271..0cb1f77 100644
> --- a/arch/blackfin/mach-bf561/coreb.c
> +++ b/arch/blackfin/mach-bf561/coreb.c
> @@ -51,6 +51,7 @@ coreb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>  static const struct file_operations coreb_fops = {
>  	.owner          = THIS_MODULE,
>  	.unlocked_ioctl = coreb_ioctl,
> +	.llseek = noop_llseek,/* no read or write fn */
>  };
>  
>  static struct miscdevice coreb_dev = {
> diff --git a/arch/cris/arch-v10/drivers/ds1302.c b/arch/cris/arch-v10/drivers/ds1302.c
> index 8842756..b6d8d33 100644
> --- a/arch/cris/arch-v10/drivers/ds1302.c
> +++ b/arch/cris/arch-v10/drivers/ds1302.c
> @@ -387,6 +387,7 @@ print_rtc_status(void)
>  static const struct file_operations rtc_fops = {
>  	.owner		= THIS_MODULE,
>  	.unlocked_ioctl = rtc_unlocked_ioctl,
> +	.llseek = noop_llseek,/* no read or write fn */
>  }; 
>  
>  /* Probe for the chip by writing something to its RAM and try reading it back. */
> diff --git a/arch/cris/arch-v10/drivers/gpio.c b/arch/cris/arch-v10/drivers/gpio.c
> index 4b0f65f..2516c2e 100644
> --- a/arch/cris/arch-v10/drivers/gpio.c
> +++ b/arch/cris/arch-v10/drivers/gpio.c
> @@ -719,6 +719,7 @@ static const struct file_operations gpio_fops = {
>  	.write       = gpio_write,
>  	.open        = gpio_open,
>  	.release     = gpio_release,
> +	.llseek = noop_llseek,/* write uses no f_pos */
>  };
>  
>  static void ioif_watcher(const unsigned int gpio_in_available,
> diff --git a/arch/cris/arch-v10/drivers/i2c.c b/arch/cris/arch-v10/drivers/i2c.c
> index a8737a8..fc25b5f 100644
> --- a/arch/cris/arch-v10/drivers/i2c.c
> +++ b/arch/cris/arch-v10/drivers/i2c.c
> @@ -622,6 +622,7 @@ static const struct file_operations i2c_fops = {
>  	.ioctl    = i2c_ioctl,
>  	.open     = i2c_open,
>  	.release  = i2c_release,
> +	.llseek = noop_llseek,/* no read or write fn */
>  };
>  
>  int __init
> diff --git a/arch/cris/arch-v10/drivers/pcf8563.c b/arch/cris/arch-v10/drivers/pcf8563.c
> index 7dcb1f8..fbf135b 100644
> --- a/arch/cris/arch-v10/drivers/pcf8563.c
> +++ b/arch/cris/arch-v10/drivers/pcf8563.c
> @@ -64,6 +64,7 @@ static int voltage_low;
>  static const struct file_operations pcf8563_fops = {
>  	.owner = THIS_MODULE,
>  	.unlocked_ioctl = pcf8563_unlocked_ioctl,
> +	.llseek = noop_llseek,/* no read or write fn */
>  };
>  
>  unsigned char
> diff --git a/arch/cris/arch-v10/drivers/sync_serial.c b/arch/cris/arch-v10/drivers/sync_serial.c
> index 109dcd8..dd9b18b 100644
> --- a/arch/cris/arch-v10/drivers/sync_serial.c
> +++ b/arch/cris/arch-v10/drivers/sync_serial.c
> @@ -250,7 +250,8 @@ static const struct file_operations sync_serial_fops = {
>  	.poll    = sync_serial_poll,
>  	.ioctl   = sync_serial_ioctl,
>  	.open    = sync_serial_open,
> -	.release = sync_serial_release
> +	.release = sync_serial_release,
> +	.llseek = noop_llseek,/* read and write both use no f_pos */
>  };
>  
>  static int __init etrax_sync_serial_init(void)
> diff --git a/arch/cris/arch-v32/drivers/cryptocop.c b/arch/cris/arch-v32/drivers/cryptocop.c
> index b70fb34..540d94d 100644
> --- a/arch/cris/arch-v32/drivers/cryptocop.c
> +++ b/arch/cris/arch-v32/drivers/cryptocop.c
> @@ -282,7 +282,8 @@ const struct file_operations cryptocop_fops = {
>  	.owner =	THIS_MODULE,
>  	.open =		cryptocop_open,
>  	.release =	cryptocop_release,
> -	.ioctl =	cryptocop_ioctl
> +	.ioctl =	cryptocop_ioctl,
> +	.llseek = noop_llseek,/* no read or write fn */
>  };
>  
>  
> diff --git a/arch/cris/arch-v32/drivers/i2c.c b/arch/cris/arch-v32/drivers/i2c.c
> index 2fd6a74..69a1d9a 100644
> --- a/arch/cris/arch-v32/drivers/i2c.c
> +++ b/arch/cris/arch-v32/drivers/i2c.c
> @@ -698,6 +698,7 @@ static const struct file_operations i2c_fops = {
>  	.unlocked_ioctl = i2c_ioctl,
>  	.open		= i2c_open,
>  	.release	= i2c_release,
> +	.llseek = noop_llseek,/* no read or write fn */
>  };
>  
>  static int __init i2c_init(void)
> diff --git a/arch/cris/arch-v32/drivers/mach-a3/gpio.c b/arch/cris/arch-v32/drivers/mach-a3/gpio.c
> index 97357cf..13bf637 100644
> --- a/arch/cris/arch-v32/drivers/mach-a3/gpio.c
> +++ b/arch/cris/arch-v32/drivers/mach-a3/gpio.c
> @@ -883,6 +883,7 @@ static const struct file_operations gpio_fops = {
>  	.write       = gpio_write,
>  	.open        = gpio_open,
>  	.release     = gpio_release,
> +	.llseek = noop_llseek,/* write uses no f_pos */
>  };
>  
>  #ifdef CONFIG_ETRAX_VIRTUAL_GPIO
> 

I only got up to here in the email. (See ml sig below)
Do you have this on git or better gitweb somewhere?

Boaz

> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
> 


  parent reply	other threads:[~2010-07-08 12:18 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-07 21:40 [PATCH 00/18] VFS: turn no_llseek into the default Arnd Bergmann
2010-07-07 21:40 ` [PATCH 01/18] drm: use noop_llseek Arnd Bergmann
2010-07-07 21:40 ` [PATCH 02/18] net/wireless: use generic_file_llseek in debugfs Arnd Bergmann
2010-07-07 21:40 ` [PATCH 03/18] lkdtm: " Arnd Bergmann
2010-07-22  0:06   ` Frederic Weisbecker
     [not found] ` <1278538820-1392-1-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2010-07-07 21:40   ` [PATCH 04/18] ib/qib: use generic_file_llseek Arnd Bergmann
2010-07-07 21:40     ` Arnd Bergmann
     [not found]     ` <1278538820-1392-5-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2010-07-21 18:40       ` Roland Dreier
2010-07-21 18:40         ` Roland Dreier
2010-07-07 21:40 ` [PATCH 05/18] arm/omap: use generic_file_llseek in iommu_debug Arnd Bergmann
2010-07-07 21:40 ` [PATCH 06/18] spufs: use llseek in all file operations Arnd Bergmann
2010-07-07 21:40   ` Arnd Bergmann
2010-07-08  1:15   ` Jeremy Kerr
2010-07-08  1:15     ` Jeremy Kerr
2010-07-08 13:02     ` Arnd Bergmann
2010-07-08 13:02       ` Arnd Bergmann
2010-07-08 13:29       ` [PATCH v2] " Arnd Bergmann
2010-07-08 13:29         ` Arnd Bergmann
2010-07-07 21:40 ` [PATCH 07/18] staging: " Arnd Bergmann
2010-07-07 21:40 ` [PATCH 08/18] selinux: use generic_file_llseek Arnd Bergmann
2010-07-08 14:52   ` Eric Paris
2010-07-11 23:44   ` James Morris
2010-07-07 21:40 ` [PATCH 09/18] tracing: use generic_file_llseek for debugfs Arnd Bergmann
2010-07-07 21:58   ` Frederic Weisbecker
2010-07-21 20:52   ` [tip:perf/core] tracing: Use " tip-bot for Arnd Bergmann
2010-07-07 21:40 ` [PATCH 10/18] ibmasmfs: use generic_file_llseek Arnd Bergmann
2010-07-07 21:40 ` [PATCH 11/18] oprofile: make event buffer nonseekable Arnd Bergmann
2010-07-09  7:51   ` Robert Richter
2010-07-26  9:06   ` Robert Richter
2010-07-07 21:40 ` [PATCH 12/18] raw: use explicit llseek file operations Arnd Bergmann
2010-07-21 23:50   ` Frederic Weisbecker
2010-07-07 21:40 ` [PATCH 13/18] ima: use generic_file_llseek for securityfs Arnd Bergmann
2010-07-08 12:50   ` Mimi Zohar
2010-07-08 13:00     ` Arnd Bergmann
2010-07-08 13:18       ` Mimi Zohar
2010-07-08 22:52         ` James Morris
2010-07-09 13:00           ` Arnd Bergmann
2010-07-11 23:45   ` James Morris
2010-07-07 21:40 ` [PATCH 14/18] irda/irnet: use noop_llseek Arnd Bergmann
2010-07-07 21:40 ` [PATCH 15/18] viotape: " Arnd Bergmann
2010-07-21 23:59   ` Frederic Weisbecker
2010-07-07 21:40 ` [PATCH 16/18] llseek: automatically add .llseek fop Arnd Bergmann
2010-07-07 21:55   ` Mike Frysinger
2010-07-07 22:10     ` Arnd Bergmann
2010-07-08 12:17   ` Boaz Harrosh [this message]
2010-07-08 12:23     ` Arnd Bergmann
2010-07-08 12:32       ` Boaz Harrosh
2010-07-07 21:40 ` [PATCH 17/18] vfs: don't use BKL in default_llseek Arnd Bergmann
2010-07-07 21:40 ` [PATCH 18/18] vfs: make no_llseek the default Arnd Bergmann
2010-07-08 11:25   ` Tetsuo Handa
2010-07-08 12:08     ` Arnd Bergmann
2010-07-08 12:57       ` Tetsuo Handa
2010-07-08 13:18         ` Arnd Bergmann
2010-07-08 22:55         ` James Morris

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