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* sgi-gru: fix bugs related to module unload of the GRU driverJack Steiner2009-04-02
| | | | | | | | Fix bugs related to module unload of the GRU driver. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: macro for scanning all gru chipletsJack Steiner2009-04-02
| | | | | | | | | Add macro for scanning all active GRU chiplets. Maximum chiplet id is saved during GRU initialization. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: add support to the GRU driver for message queue interruptsJack Steiner2009-04-02
| | | | | | | | | Add support to the GRU driver for message queue interrupts. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: restructure the GRU vtop functionsJack Steiner2009-04-02
| | | | | | | | | Restructure the GRU vtop functions in preparation for future changes. This patch simply moves code around & does not change the algorithm. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: aSID (context management) bug fixesJack Steiner2009-04-02
| | | | | | | | | | This patch fixes bugs related to ASID (context id) management in the GRU driver. These changes are all internal to the SGI GRU driver and have no effect on the base kernel. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: add support for a user to explicitly unload a GRU contextJack Steiner2009-04-02
| | | | | | | | Add support for a user to explicitly unload a GRU context. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: add statistics to the GRU context management functionsJack Steiner2009-04-02
| | | | | | | | Add statistics to the GRU context management functions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: change GRU CCH commands from inline functions to outofline functionsJack Steiner2009-04-02
| | | | | | | | | | Change the GRU instructions that manage contexts from inline functions to out-of-line functions. This simplifies adding statistics & error checking to these functions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: improvements to GRU debug messages & statisticsJack Steiner2009-04-02
| | | | | | | | Improvements to GRU debug messages & statistics. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: misc GRU cleanupJack Steiner2009-04-02
| | | | | | | | | | | | | | | | Misc trivial GRU drivers fixes: - fix long lines - eliminate extra whitespace - eliminate compiler warning - better validation of invalidate user parameters - bug fix for GRU TLB flush (not the cpu TLB flush) These changes are all internal to the SGI GRU driver and have no effect on the base kernel. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: add macros for using the UV hub to send interruptsJack Steiner2009-04-02
| | | | | | | | | | | | | | Add macros for using the UV hub to send interrupts. Change the IPI code to use these macros. These macros will also be used in additional patches that will follow. Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: add definitions of ia64 GRU MMRsJack Steiner2009-04-02
| | | | | | | | | Add definitions for IA64 GRU MMRs. Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: add definitions of x86_64 GRU MMRsJack Steiner2009-04-02
| | | | | | | | | | | Add definitions for x86_64 GRU MMRs. Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sgi-gru: exclude UV definitions on 32-bit x86Jack Steiner2009-04-02
| | | | | | | | | | | Eliminate compile errors on 32-bit X86 caused by UV. Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* relay: fix for possible loss/corruption of produced subbufsAravind Srinivasan2009-04-02
| | | | | | | | | | | | | | | | | | | Fix possible loss/corruption of produced subbufs in relay_subbufs_consumed(). When buf->subbufs_produced wraps around after UINT_MAX and buf->subbufs_consumed is still < UINT_MAX, the condition if (buf->subbufs_consumed > buf->subbufs_produced) will be true even for certain valid values of subbufs_consumed. This may lead to loss or corruption of produced subbufs. Signed-off-by: Aravind Srinivasan <raa.aars@gmail.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kexec: vmcoreinfo_data[] can become staticDmitri Vorobiev2009-04-02
| | | | | | | | | | | | | The vmcoreinfo_data[] array is not used outside of kernel/kexec.c, and can therefore become static. This patch adds the relevant keyword to the definition of the array. Noticed by sparse. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kexec: add dmesg log symbols to /proc/vmcoreinfo listsNeil Horman2009-04-02
| | | | | | | | | | | | | | | | | | | | | It would be nice to be able to extract the dmesg log from a vmcore file without needing to keep the debug symbols for the running kernel handy all the time. We have a facility to do this in /proc/vmcore. This patch adds the log_buf and log_end symbols to the vmcoreinfo area so that tools (like makedumpfile) can easily extract the dmesg logs from a vmcore image. [akpm@linux-foundation.org: several fixes and cleanups] [akpm@linux-foundation.org: fix unused log_buf_kexec_setup()] [akpm@linux-foundation.org: build fix] Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Cc: Simon Horman <horms@verge.net.au> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Simon Horman <horms@verge.net.au> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: coding style cleanups in w1_io.cDaniel Mack2009-04-02
| | | | | | | | | This fixes a number of coding style issues I stubled over. Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* parport: netmos 9845 & 9855 1P4S fixesPhilippe De Muyter2009-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | netmos serial/parallel adapters come in different flavour differing only by the number of parallel and serial ports, which are encoded in the subdevice ID. Last fix of Christian Pellegrin for 9855 2P2S broke support for 9855 1P4S, and works only by side-effect for the first parallel port of a 2P2S, as this first parallel port is found by reading the second addr entry of (struct parport_pc_pci) cards[netmos_9855], which is not initialized, and hence has value 0, which happens to be the BAR of the first parallel port. netmos_9xx5_combo entry in (struct parport_pc_pci) cards[], which is used for a 9845 1P4S must also be fixed for the parallel port support when there are 4 serial ports because this entry currently gives 2 as BAR index for the parallel port. Actually, in this case, BAR 2 is the 3rd serial port while the parallel port is at BAR 4. I fixed 9845 1P4S and 9855 1P4S support, while preserving 9855 2P2S support, - by creating a netmos_9855_2p entry and using it for 9855 boards with 2 parallel ports : 9855 2P2S and 9855 2P0S boards, - and by allowing netmos_parallel_init to change not only the number of parallel ports (0 or 1), but making it also change the BAR index of the parallel port when the serial ports are before the parallel port. PS: the netmos_9855_2p entry in (struct pciserial_board) pci_parport_serial_boards[] is needed because netmos_parallel_init has no clean way to replace FL_BASE2 by FL_BASE4 in the description of the serial ports in function of the number of parallel ports on the card. Tested with 9845 1P4S, 9855 1P4S and 9855 2P2S boards. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Tested-by: Christian Pellegrin <chripell@fsfe.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: AMD8111 driver Kconfig & MakefileHarry Ciao2009-04-02
| | | | | | | | | Introduce Kconfig and Makefile options for AMD8111 EDAC driver. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: AMD8131 driver Kconfig & MakefileHarry Ciao2009-04-02
| | | | | | | | | Introduce Kconfig and Makefile options for AMD8131 EDAC driver. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: AMD8131 driver source fileHarry Ciao2009-04-02
| | | | | | | | | | | Introduce AMD8131 EDAC driver source file, which makes use of error detections on the PCI-X Bridge Controllers on the AMD8131 HyperTransport PCI-X Tunnel. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: AMD8131 driver header fileHarry Ciao2009-04-02
| | | | | | | | | | | Introduce AMD8131 EDAC driver header file, which adds register and bits definitions for the PCI-X Bridge Controller on the AMD8131 HyperTransport I/O Hub. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pci: Add AMD8111 PCI Bridge PCI Device IDHarry Ciao2009-04-02
| | | | | | | | | Add the PCI Device ID of the PCI Bridge Controller on AMD8111 chip. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: Add edac_pci_alloc_index()Harry Ciao2009-04-02
| | | | | | | | | | | | Add edac_pci_alloc_index(), because for MAPLE platform there may exist several EDAC driver modules that could make use of edac_pci_ctl_info structure at the same time. The index allocation for these structures should be taken care of by EDAC core. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: AMD8111 driver source fileHarry Ciao2009-04-02
| | | | | | | | | | | Introduce AMD8111 EDAC driver source file, which makes use of error detections on the LPC Bridge Controller and PCI Bridge Controller on the AMD8111 HyperTransport I/O Hub. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: AMD8111 driver header fileHarry Ciao2009-04-02
| | | | | | | | | | | Introduce AMD8111 EDAC driver header file, which adds register and bits definitions for the LPC Bridge Controller and PCI Bridge Controller on the AMD8111 HyperTransport I/O Hub. Signed-off-by: Harry Ciao <qingtao.cao@windriver.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: new ppc4xx driver moduleGrant Erickson2009-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for an EDAC memory controller adaptation driver for the "ibm,sdram-4xx-ddr2" ECC controller realized in the AMCC PowerPC 405EX[r]. At present, this driver has been developed and tested against the controller realization in the AMCC PPC405EX[r] on the AMCC Kilauea and Haleakala boards (256 MiB w/o ECC memory soldered onto the board) and a proprietary board based on those designs (128 MiB ECC memory, also soldered onto the board). In the future, dynamic feature detection and handling needs to be added for the other realizations of this controller found in the 440SP, 440SPe, 460EX, 460GT and 460SX. Eventually, this driver will likely be evolved and adapted to the above variant realizations of this controller as well as broken apart to handle the other known ECC-capable controllers prevalent in other PPC4xx processors: - IBM SDRAM (405GP, 405CR and 405EP) "ibm,sdram-4xx" - IBM DDR1 (440GP, 440GX, 440EP and 440GR) "ibm,sdram-4xx-ddr" - Denali DDR1/DDR2 (440EPX and 440GRX) "denali,sdram-4xx-ddr2" [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Grant Erickson <gerickson@nuovations.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: remove EDAC's experimental statusDoug Thompson2009-04-02
| | | | | | | | | | After 3 years, this is a patch to remove the EXPERIMENTAL tag on EDAC. We now have many module drivers submitters in EDAC and believe EDAC is no longer EXPERIMENTAL Signed-off-by: Doug Thompson <dougthompson@xmission.com Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: add more verbose debug infoHitoshi Mitake2009-04-02
| | | | | | | | | | | | | | | | | | | | A patch for making a debugging information more verbose for use in development debugging. By enabling the new option "More verbose debugging", information about source file and line number will be added to debugging message. This is sample output, EDAC MC0: Giving out device to 'e7xxx_edac' 'E7205': DEV 0000:00:00.0 EDAC DEBUG: in drivers/edac/edac_pci.c, line at 48: edac_pci_alloc_ctl_info() EDAC DEBUG: in drivers/edac/edac_pci.c, line at 334: edac_pci_add_device() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Signed-off-by: Hitoshi Mitake <h.mitake@gmail.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nbd: trivial cleanupsPavel Machek2009-04-02
| | | | | | | | | | | Trivial cleanups for nbd: only the return -EIO one really changes code, and I've verified all the callers (plus 0 == success, 1 == error convention is really ugly). Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Paul Clements <paul.clements@steeleye.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nbd: add locking to nbd_ioctlPavel Machek2009-04-02
| | | | | | | | | | | | | | | | | | The code was written to rely on big kernel lock to protect it from races. It mostly works when interface is not abused. So this uses tx_lock to protect data structures from concurrent use between ioctl and worker threads. Next step will be moving from ioctl to unlocked_ioctl. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: add missing return] Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Paul Clements <paul.clements@steeleye.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pids: kill signal_struct-> __pgrp/__session and friendsOleg Nesterov2009-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | We are wasting 2 words in signal_struct without any reason to implement task_pgrp_nr() and task_session_nr(). task_session_nr() has no callers since 2e2ba22ea4fd4bb85f0fa37c521066db6775cbef, we can remove it. task_pgrp_nr() is still (I believe wrongly) used in fs/autofsX and fs/coda. This patch reimplements task_pgrp_nr() via task_pgrp_nr_ns(), and kills __pgrp/__session and the related helpers. The change in drivers/char/tty_io.c is cosmetic, but hopefully makes sense anyway. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Alan Cox <number6@the-village.bc.nu> [tty parts] Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pids: refactor vnr/nr_ns helpers to make them safeOleg Nesterov2009-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Inho, the safety rules for vnr/nr_ns helpers are horrible and buggy. task_pid_nr_ns(task) needs rcu/tasklist depending on task == current. As for "special" pids, vnr/nr_ns helpers always need rcu. However, if task != current, they are unsafe even under rcu lock, we can't trust task->group_leader without the special checks. And almost every helper has a callsite which needs a fix. Also, it is a bit annoying that the implementations of, say, task_pgrp_vnr() and task_pgrp_nr_ns() are not "symmetrical". This patch introduces the new helper, __task_pid_nr_ns(), which is always safe to use, and turns all other helpers into the trivial wrappers. After this I'll send another patch which converts task_tgid_xxx() as well, they're are a bit special. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pids: improve get_task_pid() to fix the unsafe sys_wait4()->task_pgrp()Oleg Nesterov2009-04-02
| | | | | | | | | | | | | | | sys_wait4() does get_pid(task_pgrp(current)), this is not safe. We can add rcu lock/unlock around, but we already have get_task_pid() which can be improved to handle the special pids in more reliable manner. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pids: document task_pgrp/task_session is not safe without tasklist/rcuOleg Nesterov2009-04-02
| | | | | | | | | | | | | | | | | | | Even if task == current, it is not safe to dereference the result of task_pgrp/task_session. We can race with another thread which changes the special pid via setpgid/setsid. Document this. The next 2 patches give an example of the unsafe usage, we have more bad users. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sysctl: fix suid_dumpable and lease-break-time sysctlsMatthew Wilcox2009-04-02
| | | | | | | | | | | | | | | Arne de Bruijn points out that commit 76fdbb25f963de5dc1e308325f0578a2f92b1c2d ("coredump masking: bound suid_dumpable sysctl") mistakenly limits lease-break-time instead of suid_dumpable. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Reported-by: Arne de Bruijn <kernelbt@arbruijn.dds.nl> Cc: Kawai, Hidehiro <hidehiro.kawai.ez@hitachi.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hpet: fix the possibility of insane return value of hpet_calibrate() against SMIYasunori Goto2009-04-02
| | | | | | | | | | | | | | | | | | hpet_calibrate() has a possibility of miss-calibration due to SMI. If SMI interrupts in the while loop of calibration, then return value will be big. This change calibrates until stabilizing by the return value with a small value. [akpm@linux-foundation.org: trivial style tweaks] Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Acked-by: Clemens Ladisch <clemens@ladisch.de> Acked-by: Vojtech Pavlik <vojtech@suse.cz> Cc: Robert Picco <Robert.Picco@hp.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* synclink_gt: add clock optionsPaul Fulghum2009-04-02
| | | | | | | | | | Add support for x8 asynchronous sample rate and ability to specify base clock frequency. Signed-off-by: Paul Fulghum <paulkf@microgate.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* struct linux_binprm: drop unused fieldsKirill A. Shutemov2009-04-02
| | | | | | Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bin_elf_fdpic: check the return value of clear_userMike Frysinger2009-04-02
| | | | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Cc: David Howells <dhowells@redhat.com> Cc: Greg Ungerer <gerg@snapgear.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc_sysctl: use CONFIG_PROC_SYSCTL around ipc and utsname proc_handlersSerge E. Hallyn2009-04-02
| | | | | | | | | | | | | As pointed out by Cedric Le Goater (in response to Alexey's original comment wrt mqns), ipc_sysctl.c and utsname_sysctl.c are using CONFIG_PROC_FS, not CONFIG_PROC_SYSCTL, to determine whether to define the proc_handlers. Change that. Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Acked-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ipc: make shm_get_stat() more robustTony Battersby2009-04-02
| | | | | | | | | | | | | | shm_get_stat() assumes idr_find(&shm_ids(ns).ipcs_idr) returns "struct shmid_kernel *"; all other callers assume that it returns "struct kern_ipc_perm *". This works because "struct kern_ipc_perm" is currently the first member of "struct shmid_kernel", but it would be better to use container_of() to prevent future breakage. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Cc: Jiri Olsa <olsajiri@gmail.com> Cc: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cpu hotplug: remove unused cpuhotplug_mutex_lock()Lai Jiangshan2009-04-02
| | | | | | | | | | | cpuhotplug_mutex_lock() is not used, remove it. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* workqueue: avoid recursion in run_workqueue()Lai Jiangshan2009-04-02
| | | | | | | | | | | | | | | | | | | | | | 1) lockdep will complain when run_workqueue() performs recursion. 2) The recursive implementation of run_workqueue() means that flush_workqueue() and its documentation are inconsistent. This may hide deadlocks and other bugs. 3) The recursion in run_workqueue() will poison cwq->current_work, but flush_work() and __cancel_work_timer(), etcetera need a reliable cwq->current_work. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Eric Dumazet <dada1@cosmosbay.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ptrace_untrace: fix the SIGNAL_STOP_STOPPED checkOleg Nesterov2009-04-02
| | | | | | | | | | | | | | | | | | | This bug is ancient too. ptrace_untrace() must not resume the task if the group stop in progress, we should set TASK_STOPPED instead. Unfortunately, we still have problems here: - if the process/thread was traced, SIGNAL_STOP_STOPPED does not necessary means this thread group is stopped. - ptrace breaks the bookkeeping of ->group_stop_count. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ptrace_detach: the wrong wakeup breaks the ERESTARTxxx logicOleg Nesterov2009-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Another ancient bug. Consider this trivial test-case, int main(void) { int pid = fork(); if (pid) { ptrace(PTRACE_ATTACH, pid, NULL, NULL); wait(NULL); ptrace(PTRACE_DETACH, pid, NULL, NULL); } else { pause(); printf("WE HAVE A KERNEL BUG!!!\n"); } return 0; } the child must not "escape" for sys_pause(), but it can and this was seen in practice. This is because ptrace_detach does: if (!child->exit_state) wake_up_process(child); this wakeup can happen after this child has already restarted sys_pause(), because it gets another wakeup from ptrace_untrace(). With or without this patch, perhaps sys_pause() needs a fix. But this wakeup also breaks the SIGNAL_STOP_STOPPED logic in ptrace_untrace(). Remove this wakeup. The caller saw this task in TASK_TRACED state, and unless it was SIGKILL'ed in between __ptrace_unlink()->ptrace_untrace() should handle this case correctly. If it was SIGKILL'ed, we don't need to wakup the dying tracee too. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Jerome Marchand <jmarchan@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tracehook_notify_death: use task_detached() helperOleg Nesterov2009-04-02
| | | | | | | | | | | | Now that task_detached() is exported, change tracehook_notify_death() to use this helper, nobody else checks ->exit_signal == -1 by hand. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: "Metzger, Markus T" <markus.t.metzger@intel.com> Acked-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* forget_original_parent: do not abuse child->ptrace_entryOleg Nesterov2009-04-02
| | | | | | | | | | | | | | | | | | | | | | | | By discussion with Roland. - Use ->sibling instead of ->ptrace_entry to chain the need to be release_task'd childs. Nobody else can use ->sibling, this task is EXIT_DEAD and nobody can find it on its own list. - rename ptrace_dead to dead_childs. - Now that we don't have the "parallel" untrace code, change back reparent_thread() to return void, pass dead_childs as an argument. Actually, I don't understand why do we notify /sbin/init when we reparent a zombie, probably it is better to reap it unconditionally. [akpm@linux-foundation.org: s/childs/children/] Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: "Metzger, Markus T" <markus.t.metzger@intel.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* forget_original_parent: split out the un-ptrace partOleg Nesterov2009-04-02
| | | | | | | | | | | | | | | | | | | By discussion with Roland. - Rename ptrace_exit() to exit_ptrace(), and change it to do all the necessary work with ->ptraced list by its own. - Move this code from exit.c to ptrace.c - Update the comment in ptrace_detach() to explain the rechecking of the child->ptrace. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: "Metzger, Markus T" <markus.t.metzger@intel.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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