From c5114a1cd6d84b2b3144c1c3e093c80ca6c30f47 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Sun, 10 Jan 2010 20:52:34 +0100 Subject: hwmon: (k10temp) Blacklist more family 10h processors The latest version of the Revision Guide for AMD Family 10h Processors lists two more processor revisions which may be affected by erratum 319. Change the blacklisting code to correctly detect those processors, by implementing AMD's recommended algorithm. Signed-off-by: Clemens Ladisch Signed-off-by: Jean Delvare Cc: Andreas Herrmann --- Documentation/hwmon/k10temp | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'Documentation') diff --git a/Documentation/hwmon/k10temp b/Documentation/hwmon/k10temp index a7a18d453a51..6526eee525a6 100644 --- a/Documentation/hwmon/k10temp +++ b/Documentation/hwmon/k10temp @@ -3,8 +3,8 @@ Kernel driver k10temp Supported chips: * AMD Family 10h processors: - Socket F: Quad-Core/Six-Core/Embedded Opteron - Socket AM2+: Opteron, Phenom (II) X3/X4 + Socket F: Quad-Core/Six-Core/Embedded Opteron (but see below) + Socket AM2+: Quad-Core Opteron, Phenom (II) X3/X4, Athlon X2 (but see below) Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II Socket S1G3: Athlon II, Sempron, Turion II * AMD Family 11h processors: @@ -36,10 +36,15 @@ Description This driver permits reading of the internal temperature sensor of AMD Family 10h and 11h processors. -All these processors have a sensor, but on older revisions of Family 10h -processors, the sensor may return inconsistent values (erratum 319). The -driver will refuse to load on these revisions unless you specify the -"force=1" module parameter. +All these processors have a sensor, but on those for Socket F or AM2+, +the sensor may return inconsistent values (erratum 319). The driver +will refuse to load on these revisions unless you specify the "force=1" +module parameter. + +Due to technical reasons, the driver can detect only the mainboard's +socket type, not the processor's actual capabilities. Therefore, if you +are using an AM3 processor on an AM2+ mainboard, you can safely use the +"force=1" parameter. There is one temperature measurement value, available as temp1_input in sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. -- cgit v1.2.2 From cb5a8b2c92febbed57126e1b8416dfd7607ff03d Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Fri, 8 Jan 2010 14:42:34 -0800 Subject: docs: large update to ioctl-number.txt Add many ioctl definitions to ioctl-number.txt. Fix some whitespace/formatting. Correct some filenames/paths. Signed-off-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/ioctl/ioctl-number.txt | 203 +++++++++++++++++++++++++++-------- 1 file changed, 159 insertions(+), 44 deletions(-) (limited to 'Documentation') diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt index 947374977ca5..35cf64d4436d 100644 --- a/Documentation/ioctl/ioctl-number.txt +++ b/Documentation/ioctl/ioctl-number.txt @@ -56,10 +56,11 @@ Following this convention is good because: (5) When following the convention, the driver code can use generic code to copy the parameters between user and kernel space. -This table lists ioctls visible from user land for Linux/i386. It contains -most drivers up to 2.3.14, but I know I am missing some. +This table lists ioctls visible from user land for Linux/x86. It contains +most drivers up to 2.6.31, but I know I am missing some. There has been +no attempt to list non-X86 architectures or ioctls from drivers/staging/. -Code Seq# Include File Comments +Code Seq#(hex) Include File Comments ======================================================== 0x00 00-1F linux/fs.h conflict! 0x00 00-1F scsi/scsi_ioctl.h conflict! @@ -69,119 +70,228 @@ Code Seq# Include File Comments 0x03 all linux/hdreg.h 0x04 D2-DC linux/umsdos_fs.h Dead since 2.6.11, but don't reuse these. 0x06 all linux/lp.h -0x09 all linux/md.h +0x09 all linux/raid/md_u.h +0x10 00-0F drivers/char/s390/vmcp.h 0x12 all linux/fs.h linux/blkpg.h 0x1b all InfiniBand Subsystem 0x20 all drivers/cdrom/cm206.h 0x22 all scsi/sg.h '#' 00-3F IEEE 1394 Subsystem Block for the entire subsystem +'$' 00-0F linux/perf_counter.h, linux/perf_event.h '1' 00-1F PPS kit from Ulrich Windl +'2' 01-04 linux/i2o.h +'3' 00-0F drivers/s390/char/raw3270.h conflict! +'3' 00-1F linux/suspend_ioctls.h conflict! + and kernel/power/user.c '8' all SNP8023 advanced NIC card -'A' 00-1F linux/apm_bios.h +'@' 00-0F linux/radeonfb.h conflict! +'@' 00-0F drivers/video/aty/aty128fb.c conflict! +'A' 00-1F linux/apm_bios.h conflict! +'A' 00-0F linux/agpgart.h conflict! + and drivers/char/agp/compat_ioctl.h +'A' 00-7F sound/asound.h conflict! +'B' 00-1F linux/cciss_ioctl.h conflict! +'B' 00-0F include/linux/pmu.h conflict! 'B' C0-FF advanced bbus -'C' all linux/soundcard.h +'C' all linux/soundcard.h conflict! +'C' 01-2F linux/capi.h conflict! +'C' F0-FF drivers/net/wan/cosa.h conflict! 'D' all arch/s390/include/asm/dasd.h -'E' all linux/input.h -'F' all linux/fb.h -'H' all linux/hiddev.h -'I' all linux/isdn.h +'D' 40-5F drivers/scsi/dpt/dtpi_ioctl.h +'D' 05 drivers/scsi/pmcraid.h +'E' all linux/input.h conflict! +'E' 00-0F xen/evtchn.h conflict! +'F' all linux/fb.h conflict! +'F' 01-02 drivers/scsi/pmcraid.h conflict! +'F' 20 drivers/video/fsl-diu-fb.h conflict! +'F' 20 drivers/video/intelfb/intelfb.h conflict! +'F' 20 linux/ivtvfb.h conflict! +'F' 20 linux/matroxfb.h conflict! +'F' 20 drivers/video/aty/atyfb_base.c conflict! +'F' 00-0F video/da8xx-fb.h conflict! +'F' 80-8F linux/arcfb.h conflict! +'F' DD video/sstfb.h conflict! +'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict! +'G' 00-0F linux/gigaset_dev.h conflict! +'H' 00-7F linux/hiddev.h conflict! +'H' 00-0F linux/hidraw.h conflict! +'H' 00-0F sound/asound.h conflict! +'H' 20-40 sound/asound_fm.h conflict! +'H' 80-8F sound/sfnt_info.h conflict! +'H' 10-8F sound/emu10k1.h conflict! +'H' 10-1F sound/sb16_csp.h conflict! +'H' 10-1F sound/hda_hwdep.h conflict! +'H' 40-4F sound/hdspm.h conflict! +'H' 40-4F sound/hdsp.h conflict! +'H' 90 sound/usb/usx2y/usb_stream.h +'H' C0-F0 net/bluetooth/hci.h conflict! +'H' C0-DF net/bluetooth/hidp/hidp.h conflict! +'H' C0-DF net/bluetooth/cmtp/cmtp.h conflict! +'H' C0-DF net/bluetooth/bnep/bnep.h conflict! +'I' all linux/isdn.h conflict! +'I' 00-0F drivers/isdn/divert/isdn_divert.h conflict! +'I' 40-4F linux/mISDNif.h conflict! 'J' 00-1F drivers/scsi/gdth_ioctl.h 'K' all linux/kd.h -'L' 00-1F linux/loop.h -'L' 20-2F driver/usb/misc/vstusb.h +'L' 00-1F linux/loop.h conflict! +'L' 10-1F drivers/scsi/mpt2sas/mpt2sas_ctl.h conflict! +'L' 20-2F linux/usb/vstusb.h 'L' E0-FF linux/ppdd.h encrypted disk device driver -'M' all linux/soundcard.h +'M' all linux/soundcard.h conflict! +'M' 01-16 mtd/mtd-abi.h conflict! + and drivers/mtd/mtdchar.c +'M' 01-03 drivers/scsi/megaraid/megaraid_sas.h +'M' 00-0F drivers/video/fsl-diu-fb.h conflict! 'N' 00-1F drivers/usb/scanner.h -'O' 00-02 include/mtd/ubi-user.h UBI -'P' all linux/soundcard.h +'O' 00-06 mtd/ubi-user.h UBI +'P' all linux/soundcard.h conflict! +'P' 60-6F sound/sscape_ioctl.h conflict! +'P' 00-0F drivers/usb/class/usblp.c conflict! 'Q' all linux/soundcard.h -'R' 00-1F linux/random.h +'R' 00-1F linux/random.h conflict! +'R' 01 linux/rfkill.h conflict! +'R' 01-0F media/rds.h conflict! +'R' C0-DF net/bluetooth/rfcomm.h 'S' all linux/cdrom.h conflict! 'S' 80-81 scsi/scsi_ioctl.h conflict! 'S' 82-FF scsi/scsi.h conflict! +'S' 00-7F sound/asequencer.h conflict! 'T' all linux/soundcard.h conflict! +'T' 00-AF sound/asound.h conflict! 'T' all arch/x86/include/asm/ioctls.h conflict! -'U' 00-EF linux/drivers/usb/usb.h -'V' all linux/vt.h +'T' C0-DF linux/if_tun.h conflict! +'U' all sound/asound.h conflict! +'U' 00-0F drivers/media/video/uvc/uvcvideo.h conflict! +'U' 00-CF linux/uinput.h conflict! +'U' 00-EF linux/usbdevice_fs.h +'U' C0-CF drivers/bluetooth/hci_uart.h +'V' all linux/vt.h conflict! +'V' all linux/videodev2.h conflict! +'V' C0 linux/ivtvfb.h conflict! +'V' C0 linux/ivtv.h conflict! +'V' C0 media/davinci/vpfe_capture.h conflict! +'V' C0 media/si4713.h conflict! +'V' C0-CF drivers/media/video/mxb.h conflict! 'W' 00-1F linux/watchdog.h conflict! 'W' 00-1F linux/wanrouter.h conflict! -'X' all linux/xfs_fs.h +'W' 00-3F sound/asound.h conflict! +'X' all fs/xfs/xfs_fs.h conflict! + and fs/xfs/linux-2.6/xfs_ioctl32.h + and include/linux/falloc.h + and linux/fs.h +'X' all fs/ocfs2/ocfs_fs.h conflict! +'X' 01 linux/pktcdvd.h conflict! 'Y' all linux/cyclades.h -'[' 00-07 linux/usb/usbtmc.h USB Test and Measurement Devices +'Z' 14-15 drivers/message/fusion/mptctl.h +'[' 00-07 linux/usb/tmc.h USB Test and Measurement Devices -'a' all ATM on linux +'a' all linux/atm*.h, linux/sonet.h ATM on linux -'b' 00-FF bit3 vme host bridge +'b' 00-FF conflict! bit3 vme host bridge +'b' 00-0F media/bt819.h conflict! +'c' all linux/cm4000_cs.h conflict! 'c' 00-7F linux/comstats.h conflict! 'c' 00-7F linux/coda.h conflict! -'c' 80-9F arch/s390/include/asm/chsc.h -'c' A0-AF arch/x86/include/asm/msr.h +'c' 00-1F linux/chio.h conflict! +'c' 80-9F arch/s390/include/asm/chsc.h conflict! +'c' A0-AF arch/x86/include/asm/msr.h conflict! 'd' 00-FF linux/char/drm/drm/h conflict! +'d' 02-40 pcmcia/ds.h conflict! +'d' 10-3F drivers/media/video/dabusb.h conflict! +'d' C0-CF drivers/media/video/saa7191.h conflict! 'd' F0-FF linux/digi1.h 'e' all linux/digi1.h conflict! -'e' 00-1F net/irda/irtty.h conflict! -'f' 00-1F linux/ext2_fs.h -'h' 00-7F Charon filesystem +'e' 00-1F drivers/net/irda/irtty-sir.h conflict! +'f' 00-1F linux/ext2_fs.h conflict! +'f' 00-1F linux/ext3_fs.h conflict! +'f' 00-0F fs/jfs/jfs_dinode.h conflict! +'f' 00-0F fs/ext4/ext4.h conflict! +'f' 00-0F linux/fs.h conflict! +'f' 00-0F fs/ocfs2/ocfs2_fs.h conflict! +'g' 00-0F linux/usb/gadgetfs.h +'g' 20-2F linux/usb/g_printer.h +'h' 00-7F conflict! Charon filesystem -'i' 00-3F linux/i2o.h +'h' 00-1F linux/hpet.h conflict! +'i' 00-3F linux/i2o-dev.h conflict! +'i' 0B-1F linux/ipmi.h conflict! +'i' 80-8F linux/i8k.h 'j' 00-3F linux/joystick.h +'k' 00-0F linux/spi/spidev.h conflict! +'k' 00-05 video/kyro.h conflict! 'l' 00-3F linux/tcfs_fs.h transparent cryptographic file system 'l' 40-7F linux/udf_fs_i.h in development: -'m' 00-09 linux/mmtimer.h +'m' 00-09 linux/mmtimer.h conflict! 'm' all linux/mtio.h conflict! 'm' all linux/soundcard.h conflict! 'm' all linux/synclink.h conflict! +'m' 00-19 drivers/message/fusion/mptctl.h conflict! +'m' 00 drivers/scsi/megaraid/megaraid_ioctl.h conflict! 'm' 00-1F net/irda/irmod.h conflict! -'n' 00-7F linux/ncp_fs.h +'n' 00-7F linux/ncp_fs.h and fs/ncpfs/ioctl.c 'n' 80-8F linux/nilfs2_fs.h NILFS2 -'n' E0-FF video/matrox.h matroxfb +'n' E0-FF linux/matroxfb.h matroxfb 'o' 00-1F fs/ocfs2/ocfs2_fs.h OCFS2 -'o' 00-03 include/mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps) -'o' 40-41 include/mtd/ubi-user.h UBI -'o' 01-A1 include/linux/dvb/*.h DVB +'o' 00-03 mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps) +'o' 40-41 mtd/ubi-user.h UBI +'o' 01-A1 linux/dvb/*.h DVB 'p' 00-0F linux/phantom.h conflict! (OpenHaptics needs this) +'p' 00-1F linux/rtc.h conflict! 'p' 00-3F linux/mc146818rtc.h conflict! 'p' 40-7F linux/nvram.h -'p' 80-9F user-space parport +'p' 80-9F linux/ppdev.h user-space parport -'p' a1-a4 linux/pps.h LinuxPPS +'p' A1-A4 linux/pps.h LinuxPPS 'q' 00-1F linux/serio.h -'q' 80-FF Internet PhoneJACK, Internet LineJACK - -'r' 00-1F linux/msdos_fs.h +'q' 80-FF linux/telephony.h Internet PhoneJACK, Internet LineJACK + linux/ixjuser.h +'r' 00-1F linux/msdos_fs.h and fs/fat/dir.c 's' all linux/cdk.h 't' 00-7F linux/if_ppp.h 't' 80-8F linux/isdn_ppp.h +'t' 90 linux/toshiba.h 'u' 00-1F linux/smb_fs.h -'v' 00-1F linux/ext2_fs.h conflict! 'v' all linux/videodev.h conflict! +'v' 00-1F linux/ext2_fs.h conflict! +'v' 00-1F linux/fs.h conflict! +'v' 00-0F linux/sonypi.h conflict! +'v' C0-CF drivers/media/video/ov511.h conflict! +'v' C0-DF media/pwc-ioctl.h conflict! +'v' C0-FF linux/meye.h conflict! +'v' C0-CF drivers/media/video/zoran/zoran.h conflict! +'v' D0-DF drivers/media/video/cpia2/cpia2dev.h conflict! 'w' all CERN SCI driver 'y' 00-1F packet based user level communications -'z' 00-3F CAN bus card +'z' 00-3F CAN bus card conflict! -'z' 40-7F CAN bus card +'z' 40-7F CAN bus card conflict! +'z' 10-4F drivers/s390/crypto/zcrypt_api.h conflict! 0x80 00-1F linux/fb.h 0x81 00-1F linux/videotext.h +0x88 00-3F media/ovcamchip.h 0x89 00-06 arch/x86/include/asm/sockios.h 0x89 0B-DF linux/sockios.h 0x89 E0-EF linux/sockios.h SIOCPROTOPRIVATE range +0x89 E0-EF linux/dn.h PROTOPRIVATE range 0x89 F0-FF linux/sockios.h SIOCDEVPRIVATE range 0x8B all linux/wireless.h 0x8C 00-3F WiNRADiO driver 0x90 00 drivers/cdrom/sbpcd.h +0x92 00-0F drivers/usb/mon/mon_bin.c 0x93 60-7F linux/auto_fs.h +0x94 all fs/btrfs/ioctl.h 0x99 00-0F 537-Addinboard driver 0xA0 all linux/sdp/sdp.h Industrial Device Project @@ -192,17 +302,22 @@ Code Seq# Include File Comments 0xAB 00-1F linux/nbd.h 0xAC 00-1F linux/raw.h 0xAD 00 Netfilter device in development: - + 0xAE all linux/kvm.h Kernel-based Virtual Machine 0xB0 all RATIO devices in development: 0xB1 00-1F PPPoX +0xC0 00-0F linux/usb/iowarrior.h 0xCB 00-1F CBM serial IEC bus in development: +0xCD 01 linux/reiserfs_fs.h +0xCF 02 fs/cifs/ioctl.c +0xDB 00-0F drivers/char/mwave/mwavepub.h 0xDD 00-3F ZFCP device driver see drivers/s390/scsi/ -0xF3 00-3F video/sisfb.h sisfb (in development) +0xF3 00-3F drivers/usb/misc/sisusbvga/sisusb.h sisfb (in development) 0xF4 00-1F video/mbxfb.h mbxfb +0xFD all linux/dm-ioctl.h -- cgit v1.2.2 From 1306d603fcf1f6682f8575d1ff23631a24184b21 Mon Sep 17 00:00:00 2001 From: KOSAKI Motohiro Date: Fri, 8 Jan 2010 14:42:56 -0800 Subject: proc: partially revert "procfs: provide stack information for threads" Commit d899bf7b (procfs: provide stack information for threads) introduced to show stack information in /proc/{pid}/status. But it cause large performance regression. Unfortunately /proc/{pid}/status is used ps command too and ps is one of most important component. Because both to take mmap_sem and page table walk are heavily operation. If many process run, the ps performance is, [before d899bf7b] % perf stat ps >/dev/null Performance counter stats for 'ps': 4090.435806 task-clock-msecs # 0.032 CPUs 229 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 234 page-faults # 0.000 M/sec 8587565207 cycles # 2099.425 M/sec 9866662403 instructions # 1.149 IPC 3789415411 cache-references # 926.409 M/sec 30419509 cache-misses # 7.437 M/sec 128.859521955 seconds time elapsed [after d899bf7b] % perf stat ps > /dev/null Performance counter stats for 'ps': 4305.081146 task-clock-msecs # 0.028 CPUs 480 context-switches # 0.000 M/sec 2 CPU-migrations # 0.000 M/sec 237 page-faults # 0.000 M/sec 9021211334 cycles # 2095.480 M/sec 10605887536 instructions # 1.176 IPC 3612650999 cache-references # 839.160 M/sec 23917502 cache-misses # 5.556 M/sec 152.277819582 seconds time elapsed Thus, this patch revert it. Fortunately /proc/{pid}/task/{tid}/smaps provide almost same information. we can use it. Commit d899bf7b introduced two features: 1) Add the annotattion of [thread stack: xxxx] mark to /proc/{pid}/task/{tid}/maps. 2) Add StackUsage field to /proc/{pid}/status. I only revert (2), because I haven't seen (1) cause regression. Signed-off-by: KOSAKI Motohiro Cc: Stefani Seibold Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Alexey Dobriyan Cc: "Eric W. Biederman" Cc: Randy Dunlap Cc: Andrew Morton Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/filesystems/proc.txt | 2 -- 1 file changed, 2 deletions(-) (limited to 'Documentation') diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index 220cc6376ef8..0d07513a67a6 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -177,7 +177,6 @@ read the file /proc/PID/status: CapBnd: ffffffffffffffff voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 - Stack usage: 12 kB This shows you nearly the same information you would get if you viewed it with the ps command. In fact, ps uses the proc file system to obtain its @@ -231,7 +230,6 @@ Table 1-2: Contents of the statm files (as of 2.6.30-rc7) Mems_allowed_list Same as previous, but in "list format" voluntary_ctxt_switches number of voluntary context switches nonvoluntary_ctxt_switches number of non voluntary context switches - Stack usage: stack usage high water mark (round up to page size) .............................................................................. Table 1-3: Contents of the statm files (as of 2.6.8-rc3) -- cgit v1.2.2 From b5430a04e995081a308b4419bd0940f2badc6e6b Mon Sep 17 00:00:00 2001 From: Tomaz Mertelj Date: Fri, 8 Jan 2010 14:43:04 -0800 Subject: hwmon: driver for Texas Instruments amc6821 chip Signed-off-by: Cc: Jean Delvare Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/hwmon/amc6821 | 102 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 Documentation/hwmon/amc6821 (limited to 'Documentation') diff --git a/Documentation/hwmon/amc6821 b/Documentation/hwmon/amc6821 new file mode 100644 index 000000000000..ced8359c50f8 --- /dev/null +++ b/Documentation/hwmon/amc6821 @@ -0,0 +1,102 @@ +Kernel driver amc6821 +===================== + +Supported chips: + Texas Instruments AMC6821 + Prefix: 'amc6821' + Addresses scanned: 0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, 0x4c, 0x4d, 0x4e + Datasheet: http://focus.ti.com/docs/prod/folders/print/amc6821.html + +Authors: + Tomaz Mertelj + + +Description +----------- + +This driver implements support for the Texas Instruments amc6821 chip. +The chip has one on-chip and one remote temperature sensor and one pwm fan +regulator. +The pwm can be controlled either from software or automatically. + +The driver provides the following sensor accesses in sysfs: + +temp1_input ro on-chip temperature +temp1_min rw " +temp1_max rw " +temp1_crit rw " +temp1_min_alarm ro " +temp1_max_alarm ro " +temp1_crit_alarm ro " + +temp2_input ro remote temperature +temp2_min rw " +temp2_max rw " +temp2_crit rw " +temp2_min_alarm ro " +temp2_max_alarm ro " +temp2_crit_alarm ro " +temp2_fault ro " + +fan1_input ro tachometer speed +fan1_min rw " +fan1_max rw " +fan1_fault ro " +fan1_div rw Fan divisor can be either 2 or 4. + +pwm1 rw pwm1 +pwm1_enable rw regulator mode, 1=open loop, 2=fan controlled + by remote temperature, 3=fan controlled by + combination of the on-chip temperature and + remote-sensor temperature, +pwm1_auto_channels_temp ro 1 if pwm_enable==2, 3 if pwm_enable==3 +pwm1_auto_point1_pwm ro Hardwired to 0, shared for both + temperature channels. +pwm1_auto_point2_pwm rw This value is shared for both temperature + channels. +pwm1_auto_point3_pwm rw Hardwired to 255, shared for both + temperature channels. + +temp1_auto_point1_temp ro Hardwired to temp2_auto_point1_temp + which is rw. Below this temperature fan stops. +temp1_auto_point2_temp rw The low-temperature limit of the proportional + range. Below this temperature + pwm1 = pwm1_auto_point2_pwm. It can go from + 0 degree C to 124 degree C in steps of + 4 degree C. Read it out after writing to get + the actual value. +temp1_auto_point3_temp rw Above this temperature fan runs at maximum + speed. It can go from temp1_auto_point2_temp. + It can only have certain discrete values + which depend on temp1_auto_point2_temp and + pwm1_auto_point2_pwm. Read it out after + writing to get the actual value. + +temp2_auto_point1_temp rw Must be between 0 degree C and 63 degree C and + it defines the passive cooling temperature. + Below this temperature the fan stops in + the closed loop mode. +temp2_auto_point2_temp rw The low-temperature limit of the proportional + range. Below this temperature + pwm1 = pwm1_auto_point2_pwm. It can go from + 0 degree C to 124 degree C in steps + of 4 degree C. + +temp2_auto_point3_temp rw Above this temperature fan runs at maximum + speed. It can only have certain discrete + values which depend on temp2_auto_point2_temp + and pwm1_auto_point2_pwm. Read it out after + writing to get actual value. + + +Module parameters +----------------- + +If your board has a BIOS that initializes the amc6821 correctly, you should +load the module with: init=0. + +If your board BIOS doesn't initialize the chip, or you want +different settings, you can set the following parameters: +init=1, +pwminv: 0 default pwm output, 1 inverts pwm output. + -- cgit v1.2.2 From 006b4298f26984d514546fe4e53371761f66b643 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Fri, 8 Jan 2010 14:43:07 -0800 Subject: Documentation: update ring-buffer-design.txt Fix typos, grammos, spellos, hyphenation. Signed-off-by: Randy Dunlap Acked-by: Steven Rostedt Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/trace/ring-buffer-design.txt | 56 +++++++++++++++--------------- 1 file changed, 28 insertions(+), 28 deletions(-) (limited to 'Documentation') diff --git a/Documentation/trace/ring-buffer-design.txt b/Documentation/trace/ring-buffer-design.txt index 5b1d23d604c5..d299ff31df57 100644 --- a/Documentation/trace/ring-buffer-design.txt +++ b/Documentation/trace/ring-buffer-design.txt @@ -33,9 +33,9 @@ head_page - a pointer to the page that the reader will use next tail_page - a pointer to the page that will be written to next -commit_page - a pointer to the page with the last finished non nested write. +commit_page - a pointer to the page with the last finished non-nested write. -cmpxchg - hardware assisted atomic transaction that performs the following: +cmpxchg - hardware-assisted atomic transaction that performs the following: A = B iff previous A == C @@ -52,15 +52,15 @@ The Generic Ring Buffer The ring buffer can be used in either an overwrite mode or in producer/consumer mode. -Producer/consumer mode is where the producer were to fill up the +Producer/consumer mode is where if the producer were to fill up the buffer before the consumer could free up anything, the producer will stop writing to the buffer. This will lose most recent events. -Overwrite mode is where the produce were to fill up the buffer +Overwrite mode is where if the producer were to fill up the buffer before the consumer could free up anything, the producer will overwrite the older data. This will lose the oldest events. -No two writers can write at the same time (on the same per cpu buffer), +No two writers can write at the same time (on the same per-cpu buffer), but a writer may interrupt another writer, but it must finish writing before the previous writer may continue. This is very important to the algorithm. The writers act like a "stack". The way interrupts works @@ -79,16 +79,16 @@ the interrupt doing a write as well. Readers can happen at any time. But no two readers may run at the same time, nor can a reader preempt/interrupt another reader. A reader -can not preempt/interrupt a writer, but it may read/consume from the +cannot preempt/interrupt a writer, but it may read/consume from the buffer at the same time as a writer is writing, but the reader must be on another processor to do so. A reader may read on its own processor and can be preempted by a writer. -A writer can preempt a reader, but a reader can not preempt a writer. +A writer can preempt a reader, but a reader cannot preempt a writer. But a reader can read the buffer at the same time (on another processor) as a writer. -The ring buffer is made up of a list of pages held together by a link list. +The ring buffer is made up of a list of pages held together by a linked list. At initialization a reader page is allocated for the reader that is not part of the ring buffer. @@ -102,7 +102,7 @@ the head page. The reader has its own page to use. At start up time, this page is allocated but is not attached to the list. When the reader wants -to read from the buffer, if its page is empty (like it is on start up) +to read from the buffer, if its page is empty (like it is on start-up), it will swap its page with the head_page. The old reader page will become part of the ring buffer and the head_page will be removed. The page after the inserted page (old reader_page) will become the @@ -206,7 +206,7 @@ The main pointers: commit page - the page that last finished a write. -The commit page only is updated by the outer most writer in the +The commit page only is updated by the outermost writer in the writer stack. A writer that preempts another writer will not move the commit page. @@ -281,7 +281,7 @@ with the previous write. The commit pointer points to the last write location that was committed without preempting another write. When a write that preempted another write is committed, it only becomes a pending commit -and will not be a full commit till all writes have been committed. +and will not be a full commit until all writes have been committed. The commit page points to the page that has the last full commit. The tail page points to the page with the last write (before @@ -292,7 +292,7 @@ be several pages ahead. If the tail page catches up to the commit page then no more writes may take place (regardless of the mode of the ring buffer: overwrite and produce/consumer). -The order of pages are: +The order of pages is: head page commit page @@ -311,7 +311,7 @@ Possible scenario: There is a special case that the head page is after either the commit page and possibly the tail page. That is when the commit (and tail) page has been swapped with the reader page. This is because the head page is always -part of the ring buffer, but the reader page is not. When ever there +part of the ring buffer, but the reader page is not. Whenever there has been less than a full page that has been committed inside the ring buffer, and a reader swaps out a page, it will be swapping out the commit page. @@ -338,7 +338,7 @@ and a reader swaps out a page, it will be swapping out the commit page. In this case, the head page will not move when the tail and commit move back into the ring buffer. -The reader can not swap a page into the ring buffer if the commit page +The reader cannot swap a page into the ring buffer if the commit page is still on that page. If the read meets the last commit (real commit not pending or reserved), then there is nothing more to read. The buffer is considered empty until another full commit finishes. @@ -395,7 +395,7 @@ The main idea behind the lockless algorithm is to combine the moving of the head_page pointer with the swapping of pages with the reader. State flags are placed inside the pointer to the page. To do this, each page must be aligned in memory by 4 bytes. This will allow the 2 -least significant bits of the address to be used as flags. Since +least significant bits of the address to be used as flags, since they will always be zero for the address. To get the address, simply mask out the flags. @@ -460,7 +460,7 @@ When the reader tries to swap the page with the ring buffer, it will also use cmpxchg. If the flag bit in the pointer to the head page does not have the HEADER flag set, the compare will fail and the reader will need to look for the new head page and try again. -Note, the flag UPDATE and HEADER are never set at the same time. +Note, the flags UPDATE and HEADER are never set at the same time. The reader swaps the reader page as follows: @@ -539,7 +539,7 @@ updated to the reader page. | +-----------------------------+ | +------------------------------------+ -Another important point. The page that the reader page points back to +Another important point: The page that the reader page points back to by its previous pointer (the one that now points to the new head page) never points back to the reader page. That is because the reader page is not part of the ring buffer. Traversing the ring buffer via the next pointers @@ -572,7 +572,7 @@ not be able to swap the head page from the buffer, nor will it be able to move the head page, until the writer is finished with the move. This eliminates any races that the reader can have on the writer. The reader -must spin, and this is why the reader can not preempt the writer. +must spin, and this is why the reader cannot preempt the writer. tail page | @@ -659,9 +659,9 @@ before pushing the head page. If it is, then it can be assumed that the tail page wrapped the buffer, and we must drop new writes. This is not a race condition, because the commit page can only be moved -by the outter most writer (the writer that was preempted). +by the outermost writer (the writer that was preempted). This means that the commit will not move while a writer is moving the -tail page. The reader can not swap the reader page if it is also being +tail page. The reader cannot swap the reader page if it is also being used as the commit page. The reader can simply check that the commit is off the reader page. Once the commit page leaves the reader page it will never go back on it unless a reader does another swap with the @@ -733,7 +733,7 @@ The write converts the head page pointer to UPDATE. --->| |<---| |<---| |<---| |<--- +---+ +---+ +---+ +---+ -But if a nested writer preempts here. It will see that the next +But if a nested writer preempts here, it will see that the next page is a head page, but it is also nested. It will detect that it is nested and will save that information. The detection is the fact that it sees the UPDATE flag instead of a HEADER or NORMAL @@ -761,7 +761,7 @@ to NORMAL. --->| |<---| |<---| |<---| |<--- +---+ +---+ +---+ +---+ -After the nested writer finishes, the outer most writer will convert +After the nested writer finishes, the outermost writer will convert the UPDATE pointer to NORMAL. @@ -812,7 +812,7 @@ head page. +---+ +---+ +---+ +---+ The nested writer moves the tail page forward. But does not set the old -update page to NORMAL because it is not the outer most writer. +update page to NORMAL because it is not the outermost writer. tail page | @@ -892,7 +892,7 @@ It will return to the first writer. --->| |<---| |<---| |<---| |<--- +---+ +---+ +---+ +---+ -The first writer can not know atomically test if the tail page moved +The first writer cannot know atomically if the tail page moved while it updates the HEAD page. It will then update the head page to what it thinks is the new head page. @@ -923,9 +923,9 @@ if the tail page is either where it use to be or on the next page: --->| |<---| |<---| |<---| |<--- +---+ +---+ +---+ +---+ -If tail page != A and tail page does not equal B, then it must reset the -pointer back to NORMAL. The fact that it only needs to worry about -nested writers, it only needs to check this after setting the HEAD page. +If tail page != A and tail page != B, then it must reset the pointer +back to NORMAL. The fact that it only needs to worry about nested +writers means that it only needs to check this after setting the HEAD page. (first writer) @@ -939,7 +939,7 @@ nested writers, it only needs to check this after setting the HEAD page. +---+ +---+ +---+ +---+ Now the writer can update the head page. This is also why the head page must -remain in UPDATE and only reset by the outer most writer. This prevents +remain in UPDATE and only reset by the outermost writer. This prevents the reader from seeing the incorrect head page. -- cgit v1.2.2 From d2b34e20c1f431604e0dde910c3ff271c84ed706 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Fri, 8 Jan 2010 14:43:09 -0800 Subject: documentation: update kernel-doc-nano-HOWTO information Remove comments about function short descriptions not allowed to be on multiple lines (that was fixed/changed recently). Add comments that function "section header:" names need to be unique per function/struct/union/typedef/enum. Signed-off-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/kernel-doc-nano-HOWTO.txt | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'Documentation') diff --git a/Documentation/kernel-doc-nano-HOWTO.txt b/Documentation/kernel-doc-nano-HOWTO.txt index 348b9e5e28fc..27a52b35d55b 100644 --- a/Documentation/kernel-doc-nano-HOWTO.txt +++ b/Documentation/kernel-doc-nano-HOWTO.txt @@ -214,11 +214,13 @@ The format of the block comment is like this: * (section header: (section description)? )* (*)?*/ -The short function description ***cannot be multiline***, but the other -descriptions can be (and they can contain blank lines). If you continue -that initial short description onto a second line, that second line will -appear further down at the beginning of the description section, which is -almost certainly not what you had in mind. +All "description" text can span multiple lines, although the +function_name & its short description are traditionally on a single line. +Description text may also contain blank lines (i.e., lines that contain +only a "*"). + +"section header:" names must be unique per function (or struct, +union, typedef, enum). Avoid putting a spurious blank line after the function name, or else the description will be repeated! -- cgit v1.2.2 From aa4e2e171385bb77b4da8b760d26dea2aa291587 Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Mon, 11 Jan 2010 15:53:45 -0800 Subject: Documentation/3c509: document ethtool support 3c509 was changed to support ethtool in 2002, making the 'xcvr' module parameter obsolete in most cases. More recently 3c509 was converted to the modern driver model and this parameter was removed. Fix the documentation to refer to ethtool rather than the module parameter. Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller --- Documentation/networking/3c509.txt | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/networking/3c509.txt b/Documentation/networking/3c509.txt index 0643e3b7168c..3c45d5dcd63b 100644 --- a/Documentation/networking/3c509.txt +++ b/Documentation/networking/3c509.txt @@ -48,11 +48,11 @@ for LILO parameters for doing this: This configures the first found 3c509 card for IRQ 10, base I/O 0x310, and transceiver type 3 (10base2). The flag "0x3c509" must be set to avoid conflicts with other card types when overriding the I/O address. When the driver is -loaded as a module, only the IRQ and transceiver setting may be overridden. -For example, setting two cards to 10base2/IRQ10 and AUI/IRQ11 is done by using -the xcvr and irq module options: +loaded as a module, only the IRQ may be overridden. For example, +setting two cards to IRQ10 and IRQ11 is done by using the irq module +option: - options 3c509 xcvr=3,1 irq=10,11 + options 3c509 irq=10,11 (2) Full-duplex mode @@ -77,6 +77,8 @@ operation. itself full-duplex capable. This is almost certainly one of two things: a full- duplex-capable Ethernet switch (*not* a hub), or a full-duplex-capable NIC on another system that's connected directly to the 3c509B via a crossover cable. + +Full-duplex mode can be enabled using 'ethtool'. /////Extremely important caution concerning full-duplex mode///// Understand that the 3c509B's hardware's full-duplex support is much more @@ -113,6 +115,8 @@ This insured that merely upgrading the driver from an earlier version would never automatically enable full-duplex mode in an existing installation; it must always be explicitly enabled via one of these code in order to be activated. + +The transceiver type can be changed using 'ethtool'. (4a) Interpretation of error messages and common problems -- cgit v1.2.2 From 292e0041c3b22c5347092152504d814119554b57 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 9 Dec 2009 06:56:40 -0500 Subject: [CPUFREQ] fix default value for ondemand governor Signed-off-by: Mike Frysinger Signed-off-by: Dave Jones --- Documentation/cpu-freq/governors.txt | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'Documentation') diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt index aed082f49d09..737988fca64d 100644 --- a/Documentation/cpu-freq/governors.txt +++ b/Documentation/cpu-freq/governors.txt @@ -145,8 +145,8 @@ show_sampling_rate_max: THIS INTERFACE IS DEPRECATED, DON'T USE IT. up_threshold: defines what the average CPU usage between the samplings of 'sampling_rate' needs to be for the kernel to make a decision on whether it should increase the frequency. For example when it is set -to its default value of '80' it means that between the checking -intervals the CPU needs to be on average more than 80% in use to then +to its default value of '95' it means that between the checking +intervals the CPU needs to be on average more than 95% in use to then decide that the CPU frequency needs to be increased. ignore_nice_load: this parameter takes a value of '0' or '1'. When -- cgit v1.2.2 From ceafe1d2fe33e92691bfdbd5a93ed259c3da7b60 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Mon, 11 Jan 2010 10:50:53 -0200 Subject: feature-removal-schedule: Add v4l1 drivers obsoleted by gspca sub drivers This patch adds the ov511, quickcam_messenger, w9968cf, stv680 and ovcamchip v4l1 drivers to the feature removal schedule as the devices they support are now all also supported by v4l2 gspca sub drivers. This patch also adds the v4l2 vc0301 driver for removal as it duplicates functionality of the gspca_zc3xx driver, zc0301 only supports 2 USB-ID's (because it only supports a limited set of sensors) wich are also supported by the gspca_zc3xx driver (which supports 53 USB-ID's in total). [mchehab@redhat.com: change "when" to 2.6.35] Signed-off-by: Hans de Goede Signed-off-by: Mauro Carvalho Chehab --- Documentation/feature-removal-schedule.txt | 49 ++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'Documentation') diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 870d190fe617..0a46833c1b76 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -493,3 +493,52 @@ Why: These two features use non-standard interfaces. There are the Who: Corentin Chary ---------------------------- + +What: usbvideo quickcam_messenger driver +When: 2.6.35 +Files: drivers/media/video/usbvideo/quickcam_messenger.[ch] +Why: obsolete v4l1 driver replaced by gspca_stv06xx +Who: Hans de Goede + +---------------------------- + +What: ov511 v4l1 driver +When: 2.6.35 +Files: drivers/media/video/ov511.[ch] +Why: obsolete v4l1 driver replaced by gspca_ov519 +Who: Hans de Goede + +---------------------------- + +What: w9968cf v4l1 driver +When: 2.6.35 +Files: drivers/media/video/w9968cf*.[ch] +Why: obsolete v4l1 driver replaced by gspca_ov519 +Who: Hans de Goede + +---------------------------- + +What: ovcamchip sensor framework +When: 2.6.35 +Files: drivers/media/video/ovcamchip/* +Why: Only used by obsoleted v4l1 drivers +Who: Hans de Goede + +---------------------------- + +What: stv680 v4l1 driver +When: 2.6.35 +Files: drivers/media/video/stv680.[ch] +Why: obsolete v4l1 driver replaced by gspca_stv0680 +Who: Hans de Goede + +---------------------------- + +What: zc0301 v4l driver +When: 2.6.35 +Files: drivers/media/video/zc0301/* +Why: Duplicate functionality with the gspca_zc3xx driver, zc0301 only + supports 2 USB-ID's (because it only supports a limited set of + sensors) wich are also supported by the gspca_zc3xx driver + (which supports 53 USB-ID's in total) +Who: Hans de Goede -- cgit v1.2.2 From 6993b1bb1e62367f500789835a1f747e12259f07 Mon Sep 17 00:00:00 2001 From: Yang Hongyang Date: Mon, 25 Jan 2010 11:10:32 +0800 Subject: tracing/documentation: Fix a typo in ftrace.txt 'ftrace' is no longer the name of the function tracer, to activate the function trace 'echo function > current_tracer' is to be used instead of 'echo ftrace > current_tracer'. Update the documentation to reflect the current implementation. Signed-off-by: Yang Hongyang LKML-Reference: <4B5D0BA8.20106@cn.fujitsu.com> Signed-off-by: Steven Rostedt --- Documentation/trace/ftrace.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 8179692fbb90..bab3040da548 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -1625,7 +1625,7 @@ If I am only interested in sys_nanosleep and hrtimer_interrupt: # echo sys_nanosleep hrtimer_interrupt \ > set_ftrace_filter - # echo ftrace > current_tracer + # echo function > current_tracer # echo 1 > tracing_enabled # usleep 1 # echo 0 > tracing_enabled -- cgit v1.2.2 From 03688970347bfea32823953a7ce5886d1713205f Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Fri, 22 Jan 2010 08:12:47 -0500 Subject: tracing/documentation: Cover new frame pointer semantics Update the graph tracer examples to cover the new frame pointer semantics (in terms of passing it along). Move the HAVE_FUNCTION_GRAPH_FP_TEST docs out of the Kconfig, into the right place, and expand on the details. Signed-off-by: Mike Frysinger LKML-Reference: <1264165967-18938-1-git-send-email-vapier@gentoo.org> Signed-off-by: Steven Rostedt --- Documentation/trace/ftrace-design.txt | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/trace/ftrace-design.txt b/Documentation/trace/ftrace-design.txt index 239f14b2b55a..6a5a579126b0 100644 --- a/Documentation/trace/ftrace-design.txt +++ b/Documentation/trace/ftrace-design.txt @@ -1,5 +1,6 @@ function tracer guts ==================== + By Mike Frysinger Introduction ------------ @@ -173,14 +174,16 @@ void ftrace_graph_caller(void) unsigned long *frompc = &...; unsigned long selfpc = - MCOUNT_INSN_SIZE; - prepare_ftrace_return(frompc, selfpc); + /* passing frame pointer up is optional -- see below */ + prepare_ftrace_return(frompc, selfpc, frame_pointer); /* restore all state needed by the ABI */ } #endif -For information on how to implement prepare_ftrace_return(), simply look at -the x86 version. The only architecture-specific piece in it is the setup of +For information on how to implement prepare_ftrace_return(), simply look at the +x86 version (the frame pointer passing is optional; see the next section for +more information). The only architecture-specific piece in it is the setup of the fault recovery table (the asm(...) code). The rest should be the same across architectures. @@ -205,6 +208,23 @@ void return_to_handler(void) #endif +HAVE_FUNCTION_GRAPH_FP_TEST +--------------------------- + +An arch may pass in a unique value (frame pointer) to both the entering and +exiting of a function. On exit, the value is compared and if it does not +match, then it will panic the kernel. This is largely a sanity check for bad +code generation with gcc. If gcc for your port sanely updates the frame +pointer under different opitmization levels, then ignore this option. + +However, adding support for it isn't terribly difficult. In your assembly code +that calls prepare_ftrace_return(), pass the frame pointer as the 3rd argument. +Then in the C version of that function, do what the x86 port does and pass it +along to ftrace_push_return_trace() instead of a stub value of 0. + +Similarly, when you call ftrace_return_to_handler(), pass it the frame pointer. + + HAVE_FTRACE_NMI_ENTER --------------------- -- cgit v1.2.2 From f6bdc2303da6786cc22a7d24b6790e9f75b4cfdc Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Thu, 28 Jan 2010 22:28:28 -0800 Subject: Input: update multi-touch protocol documentation This patch documents a new ABS_MT parameter and adds further text to clarify some points around the MT protocol. Requested-by: Yoonyoung Shim Requested-by: Mika Kuoppala Requested-by: Peter Hutterer Signed-off-by: Henrik Rydberg Signed-off-by: Dmitry Torokhov --- Documentation/input/multi-touch-protocol.txt | 48 +++++++++++++++++++++++----- 1 file changed, 40 insertions(+), 8 deletions(-) (limited to 'Documentation') diff --git a/Documentation/input/multi-touch-protocol.txt b/Documentation/input/multi-touch-protocol.txt index a12ea3b586e6..8490480ce432 100644 --- a/Documentation/input/multi-touch-protocol.txt +++ b/Documentation/input/multi-touch-protocol.txt @@ -27,12 +27,30 @@ set of events/packets. A set of ABS_MT events with the desired properties is defined. The events are divided into categories, to allow for partial implementation. The -minimum set consists of ABS_MT_TOUCH_MAJOR, ABS_MT_POSITION_X and -ABS_MT_POSITION_Y, which allows for multiple fingers to be tracked. If the -device supports it, the ABS_MT_WIDTH_MAJOR may be used to provide the size -of the approaching finger. Anisotropy and direction may be specified with -ABS_MT_TOUCH_MINOR, ABS_MT_WIDTH_MINOR and ABS_MT_ORIENTATION. The -ABS_MT_TOOL_TYPE may be used to specify whether the touching tool is a +minimum set consists of ABS_MT_POSITION_X and ABS_MT_POSITION_Y, which +allows for multiple fingers to be tracked. If the device supports it, the +ABS_MT_TOUCH_MAJOR and ABS_MT_WIDTH_MAJOR may be used to provide the size +of the contact area and approaching finger, respectively. + +The TOUCH and WIDTH parameters have a geometrical interpretation; imagine +looking through a window at someone gently holding a finger against the +glass. You will see two regions, one inner region consisting of the part +of the finger actually touching the glass, and one outer region formed by +the perimeter of the finger. The diameter of the inner region is the +ABS_MT_TOUCH_MAJOR, the diameter of the outer region is +ABS_MT_WIDTH_MAJOR. Now imagine the person pressing the finger harder +against the glass. The inner region will increase, and in general, the +ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR, which is always smaller than +unity, is related to the finger pressure. For pressure-based devices, +ABS_MT_PRESSURE may be used to provide the pressure on the contact area +instead. + +In addition to the MAJOR parameters, the oval shape of the finger can be +described by adding the MINOR parameters, such that MAJOR and MINOR are the +major and minor axis of an ellipse. Finally, the orientation of the oval +shape can be describe with the ORIENTATION parameter. + +The ABS_MT_TOOL_TYPE may be used to specify whether the touching tool is a finger or a pen or something else. Devices with more granular information may specify general shapes as blobs, i.e., as a sequence of rectangular shapes grouped together by an ABS_MT_BLOB_ID. Finally, for the few devices @@ -42,11 +60,9 @@ report finger tracking from hardware [5]. Here is what a minimal event sequence for a two-finger touch would look like: - ABS_MT_TOUCH_MAJOR ABS_MT_POSITION_X ABS_MT_POSITION_Y SYN_MT_REPORT - ABS_MT_TOUCH_MAJOR ABS_MT_POSITION_X ABS_MT_POSITION_Y SYN_MT_REPORT @@ -87,6 +103,12 @@ the contact. The ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR approximates the notion of pressure. The fingers of the hand and the palm all have different characteristic widths [1]. +ABS_MT_PRESSURE + +The pressure, in arbitrary units, on the contact area. May be used instead +of TOUCH and WIDTH for pressure-based devices or any device with a spatial +signal intensity distribution. + ABS_MT_ORIENTATION The orientation of the ellipse. The value should describe a signed quarter @@ -170,6 +192,16 @@ There are a few devices that support trackingID in hardware. User space can make use of these native identifiers to reduce bandwidth and cpu usage. +Gestures +-------- + +In the specific application of creating gesture events, the TOUCH and WIDTH +parameters can be used to, e.g., approximate finger pressure or distinguish +between index finger and thumb. With the addition of the MINOR parameters, +one can also distinguish between a sweeping finger and a pointing finger, +and with ORIENTATION, one can detect twisting of fingers. + + Notes ----- -- cgit v1.2.2 From a225a5cc2c25e1217e68ee2ab8dd4454573fa308 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Tue, 2 Feb 2010 13:44:15 -0800 Subject: fault injection: correct function names in documentation init_fault_attr_entries() should be init_fault_attr_dentries(). cleanup_fault_attr_entries() should be cleanup_fault_attr_dentries(). Signed-off-by: Anton Blanchard Acked-by: Akinobu Mita Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/fault-injection/fault-injection.txt | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'Documentation') diff --git a/Documentation/fault-injection/fault-injection.txt b/Documentation/fault-injection/fault-injection.txt index 079305640790..7be15e44d481 100644 --- a/Documentation/fault-injection/fault-injection.txt +++ b/Documentation/fault-injection/fault-injection.txt @@ -143,8 +143,8 @@ o provide a way to configure fault attributes failslab, fail_page_alloc, and fail_make_request use this way. Helper functions: - init_fault_attr_entries(entries, attr, name); - void cleanup_fault_attr_entries(entries); + init_fault_attr_dentries(entries, attr, name); + void cleanup_fault_attr_dentries(entries); - module parameters -- cgit v1.2.2 From 1e93d0052d9a6b3d0b382eedceb18b519d603baf Mon Sep 17 00:00:00 2001 From: Mimi Zohar Date: Tue, 26 Jan 2010 17:02:41 -0500 Subject: ima: rename PATH_CHECK to FILE_CHECK With the movement of the ima hooks functions were renamed from *path* to *file* since they always deal with struct file. This patch renames some of the ima internal flags to make them consistent with the rest of the code. Signed-off-by: Mimi Zohar Signed-off-by: Eric Paris Signed-off-by: Al Viro --- Documentation/ABI/testing/ima_policy | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'Documentation') diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy index 6434f0df012e..6cd6daefaaed 100644 --- a/Documentation/ABI/testing/ima_policy +++ b/Documentation/ABI/testing/ima_policy @@ -20,7 +20,7 @@ Description: lsm: [[subj_user=] [subj_role=] [subj_type=] [obj_user=] [obj_role=] [obj_type=]] - base: func:= [BPRM_CHECK][FILE_MMAP][INODE_PERMISSION] + base: func:= [BPRM_CHECK][FILE_MMAP][FILE_CHECK] mask:= [MAY_READ] [MAY_WRITE] [MAY_APPEND] [MAY_EXEC] fsmagic:= hex value uid:= decimal value @@ -40,11 +40,11 @@ Description: measure func=BPRM_CHECK measure func=FILE_MMAP mask=MAY_EXEC - measure func=INODE_PERM mask=MAY_READ uid=0 + measure func=FILE_CHECK mask=MAY_READ uid=0 The default policy measures all executables in bprm_check, all files mmapped executable in file_mmap, and all files - open for read by root in inode_permission. + open for read by root in do_filp_open. Examples of LSM specific definitions: @@ -54,8 +54,8 @@ Description: dont_measure obj_type=var_log_t dont_measure obj_type=auditd_log_t - measure subj_user=system_u func=INODE_PERM mask=MAY_READ - measure subj_role=system_r func=INODE_PERM mask=MAY_READ + measure subj_user=system_u func=FILE_CHECK mask=MAY_READ + measure subj_role=system_r func=FILE_CHECK mask=MAY_READ Smack: - measure subj_user=_ func=INODE_PERM mask=MAY_READ + measure subj_user=_ func=FILE_CHECK mask=MAY_READ -- cgit v1.2.2