1. 25 Sep, 2002 4 commits
  2. 24 Sep, 2002 12 commits
    • Paul Mackerras's avatar
      [PATCH] fix null dereference in sys_mprotect · 0cd9efe3
      Paul Mackerras authored
      As it is at the moment, sys_mprotect will dereference a null pointer
      if you use it on a region that is contained within the first vma.  I
      have a little program that demonstrates this (I'll post it if anyone
      is interested).  What happens then is that the process hangs in
      do_page_fault at the down_read on the mm->mmap_sem, since sys_mprotect
      has done a down_write on mm->mmap_sem.
      
      The problem is that mprotect_fixup isn't updating prev properly.  Thus
      we can finish the main loop in sys_mprotect with prev == NULL.  This
      has been the case since Christoph's cleanups went in.  Prior to that,
      mprotect_fixup always set prev to something non-NULL.  I suspect that
      not updating prev could also cause vmas to get dropped completely if
      the region being mprotected spans more than one vma.
      
      The patch below fixes the problem by making mprotect_fixup set prev to
      a reasonable value in all circumstances.
      0cd9efe3
    • Linus Torvalds's avatar
      efae82c0
    • Patrick Mochel's avatar
      Merge osdl.org:/home/mochel/src/kernel/devel/linux-2.5-virgin · cd585d2f
      Patrick Mochel authored
      into osdl.org:/home/mochel/src/kernel/devel/linux-2.5
      cd585d2f
    • Robert Love's avatar
      [PATCH] per-cpu data preempt-safing · c6e70088
      Robert Love authored
      This unsafe access to per-CPU data via reordering of instructions or use
      of "get_cpu()".
      
      Before anyone balks at the brlock.h fix, note this was in the
      alternative version of the code which is not used by default.
      c6e70088
    • Robert Love's avatar
      [PATCH] remove preempt workaround in slab.c · 7f644d00
      Robert Love authored
      Before the irqs_disabled() check in preempt_schedule(), we worked around
      some locking issues in slab.c.  Now that we will never preempt with
      interrupts disabled, we can remove those and clean things up.
      
      This is courtesy of Manfred Spraul.
      7f644d00
    • Robert Love's avatar
      [PATCH] s/preempt_count()/in_atomic() in do_exit() · 5d671309
      Robert Love authored
      This converts the debugging check in do_exit from a check on
      preempt_count() to in_atomic().
      
      The main benefit to this is we will stop warning over the BKL and now
      use the standard mechanism for such checks.
      5d671309
    • Matthew Wilcox's avatar
      [PATCH] flock_lock_file livelock fix · 0adfb15a
      Matthew Wilcox authored
      Looks like I dropped a hunk from my patchset, sorry.
      
      We never set FL_SLEEP in the flock case, so if we should block, we'll
      livelock instead.
      0adfb15a
    • Linus Torvalds's avatar
      Simplify elevator algorithm, make it prefer reads heavily. · a9ee74e7
      Linus Torvalds authored
      This is needed for reasonable read latency with the new VM
      behaviour. 
      
      NOTE! This is way too unfair, Andrew and Jens are working on
      alternatives.
      a9ee74e7
    • Ivan Kokshaysky's avatar
      [PATCH] another alpha update · 7f012496
      Ivan Kokshaysky authored
       - Makefile cleanups and fixes
       - a bunch of syscalls added
       - removed crap from asm/ide.h (it's not needed anymore)
       - __down_read_trylock fix
      7f012496
    • Linus Torvalds's avatar
      Merge with DRI CVS tree · 76f92de7
      Linus Torvalds authored
      76f92de7
    • Jens Axboe's avatar
      [PATCH] ide io scheduler thing · 60abdcb3
      Jens Axboe authored
      IDE must use blk_queue_empty() and not do a list_empty() on the
      (potentially only) dispatch queue.  This took quite a while to find
      while debugging a new io scheduler...
      60abdcb3
    • Ingo Molnar's avatar
      [PATCH] pgrp-fix-2.5.38-A2 · 872aa4a8
      Ingo Molnar authored
      This fixes the emacs bug reported by Andries.  It should probably also
      fix other, terminal handling related weirdnesses introduced by the new
      PID handling code in 2.5.38.
      
      The bug was in the session_of_pgrp() function, if no proper session is
      found in the process group then we must take the session ID from the
      process that has pgrp PID (which does not necesserily have to be part of
      the pgrp).  The fallback code is only triggered when no process in the
      process group has a valid session - besides being faster, this also
      matches the old implementation.
      
      [ hey, who needs a POSIX conformance testsuite when we have emacs! ;) ]
      872aa4a8
  3. 23 Sep, 2002 24 commits
    • Patrick Mochel's avatar
      driver model: add better platform device support. · f6bec0e6
      Patrick Mochel authored
      Platform devices are devices commonly found on the motherboard of systems. This
      includes legacy devices (serial ports, floppy controllers, parallel ports, etc)
      and host bridges to peripheral buses. 
      
      We already had a platform bus type, which gives a way to group platform devices
      and drivers, and allow each to be bound to each other dynamically. Though before,
      it didn't do anything. It still doesn't do much, but we now have:
      
      - struct platform_device, which generically describes platform deviecs. This only
        includes a name and id in addition to a struct device, but more may be added later.
      
      - implelemnt platform_device_register() and platform_device_unregister() to handle
        adding and removing these devices. 
      
      - Create legacy_bus - a default parent device for legacy devices. 
      
      - Change the floppy driver to define a platform_device (instead of a sys_device). 
        In driverfs, this gives us now:
      
      a# tree -d /sys/bus/platform/
      /sys/bus/platform/
      |-- devices
      |   `-- floppy0 -> ../../../root/legacy/floppy0
      `-- drivers
      
      and
      
      # tree -d /sys/root/legacy/
      /sys/root/legacy/
      `-- floppy0
      f6bec0e6
    • Patrick Mochel's avatar
      Merge osdl.org:/home/mochel/src/kernel/devel/linux-2.5-virgin · d668723c
      Patrick Mochel authored
      into osdl.org:/home/mochel/src/kernel/devel/linux-2.5
      d668723c
    • Patrick Mochel's avatar
      driver model: add support for multi-board systems. · aeb14ea3
      Patrick Mochel authored
      - device struct sys_root for describing the individual boards of a multi-board
        system.
      
      - allow for registration of alternate device roots.
      
      - check if struct sys_device::root is set on registration, and add it as a child of
        an alternative root, if it's set. 
      aeb14ea3
    • Andrew Morton's avatar
      [PATCH] direct-io bandaid · bf72e973
      Andrew Morton authored
      The direct-IO code is currently generating 1 meg BIOs (and
      subsequent BUGs) because it doesn't know about bio_add_page().
      
      Could we please drop it to 16k until we get it sorted out?
      bf72e973
    • Patrick Mochel's avatar
      driver model: add support for CPUs. · 2a833213
      Patrick Mochel authored
      - Create struct cpu to generically describe cpus (it simply contains
        a struct sys_device in it).
      
      - Define an array of size NR_CPUS in arch/i386/kernel/cpu/common.c 
        and register each on bootup. This gives us something like:
      
      # tree -d /sys/root/sys/
      /sys/root/sys/
      |-- cpu0
      |-- pic0
      `-- rtc0
      
      and:
      
      # tree -d /sys/bus/system/devices/
      /sys/bus/system/devices/
      |-- cpu0 -> ../../../root/sys/cpu0
      
      - Define arch-specific CPU driver that's also registered on boot.
        That gives us: 
      
      # tree -d /sys/bus/system/drivers/
      /sys/bus/system/drivers/
      |-- cpu
      
      - Create a CPU device class that's registered very early. That 
        gives us all the CPUs in the system in one place:
      
      # tree -d /sys/class/cpu/
      /sys/class/cpu/
      |-- devices
      |   `-- 0 -> ../../../root/sys/cpu0
      `-- drivers
      
      Other archs are encouraged to do the same.
      2a833213
    • Patrick Mochel's avatar
      USB: fixup handling of generic USB driver. · 714279be
      Patrick Mochel authored
      The generic driver is used by the virtual USB bridge device. This makes sure that
      the driver is registered before we try to use it (and it gets the bus type right).
      
      We also check for equality when matching devices to drivers, because we don't 
      want to match any device to it. 
      714279be
    • Patrick Mochel's avatar
      Driver model: handle devices registered with ->driver set. · 4ee5a59e
      Patrick Mochel authored
      In some cases, especially when dealing with system and platform devices, a 
      device's driver is known when the device is registered. We still want to add
      the device to the driver's list and add it to the class.
      
      This makes splits driver binding into probe() and attach(). If the device already
      has a driver, we simply call attach(). Otherwise, we try to match it on the bus
      and still call found_match().
      
      This requires that all drivers that are referenced are registered beforehand.
      4ee5a59e
    • Patrick Mochel's avatar
      Driver model: improve support for system devices. · 8b755139
      Patrick Mochel authored
        
      - Create struct sys_device to describe system-level devices (CPUs, PICs, etc.). This 
        structure includes a 'name' and 'id' field for drivers to fill in with a simple
        canonical name (like 'pic' or 'floppy') and the id of the device relative to its 
        discovery in the system (it's enumerated value).
      
        The core then constructs the bus_id for the device from these, giving them meaningful
        names when exporting them to userspace:
      
      # tree -d /sys/root/sys/
      /sys/root/sys/
      |-- pic0
      `-- rtc0
      
      - Replace 
      	int register_sys_device(struct device * dev);
      	with 
      	int sys_device_register(struct sys_device * sysdev);
      
      - Fixup the users of the API.
      
      - Add a system_bus_type for devices to associate themselves with. This provides a 
        bus/system/ directory in driverfs that looks like:
      
      # tree -d /sys/bus/system/
      /sys/bus/system/
      |-- devices
      |   |-- pic0 -> ../../../root/sys/pic0
      |   `-- rtc0 -> ../../../root/sys/rtc0
      `-- drivers
          `-- pic
      8b755139
    • Greg Kroah-Hartman's avatar
      Merge kroah.com:/home/greg/linux/BK/bleeding_edge-2.5 · 7fcc2c87
      Greg Kroah-Hartman authored
      into kroah.com:/home/greg/linux/BK/gregkh-2.5
      7fcc2c87
    • Adams IT Services's avatar
      [PATCH] USBLCD updates · 9c5e6f5a
      Adams IT Services authored
      -increased timeout value because some people reported problems
      -(important!) Vender ID has changed from 0x1212 to 0x10D2 , my official
        assigned one.
      -added usblcd driver to configure.help
      9c5e6f5a
    • Stuart MacDonald's avatar
      [PATCH] usb whiteheat driver update · 97338442
      Stuart MacDonald authored
      Update to full working driver status. Latest firmware 4.06 too. Driver
      now officially supported.
      97338442
    • Greg Kroah-Hartman's avatar
      [PATCH] USB: made port_softint global for other usb-serial drivers to use. · e185597b
      Greg Kroah-Hartman authored
      Based off of a patch from Stuart MacDonald <stuartm@connecttech.com>
      e185597b
    • Stuart MacDonald's avatar
      [PATCH] USB: clean up the error logic for open() in the usb-serial driver · 9a50ad7f
      Stuart MacDonald authored
      This cleans up the error path in the open() call to make a bit more
      sense.
      9a50ad7f
    • Greg Kroah-Hartman's avatar
      [PATCH] USB: fix for ezusb firmware download · 20e3be5f
      Greg Kroah-Hartman authored
      This fixes a stupid error in the timeout value when downloading firmware
      to a device.  The WhiteHEAT device now works properly with this patch.
      20e3be5f
    • Alan Stern's avatar
      [PATCH] usb-storage: fix return codes... · 0d80c6f5
      Alan Stern authored
      Like the header says, this patch fixes up the various Transfer- and
      Transport-level return codes.  There were a lot of places in the various
      subdrivers that were not particularly careful about distinguishing the
      two; it would help if the people currently maintaining those drivers could
      take a look at my changes to make sure I haven't screwed anything up.
      
      # Converted US_BULK_TRANSFER_xxx to USB_STOR_XFER_xxx, to make it more
      # easily distinguishable from USB_STOR_TRANSPORT_xxx.  (Also, in the
      # future these codes may apply to control transfers as well as to bulk
      # transfers.)
      #
      # Changed USB_STOR_XFER_FAILED to USB_STOR_XFER_ERROR, since it implies
      # a transport error rather than a transport failure.
      #
      # Added a USB_STOR_XFER_STALLED code, to indicate a transfer that was
      # terminated by an endpoint stall.
      
      This patch is in preparation for one in which usb_stor_transfer_partial()
      and usb_stor_transfer() are replaced by usb_stor_bulk_transfer_buf() and
      usb_stor_bulk_transfer_srb() respectively, with slightly different
      argument lists.  Ultimately the subdrivers will be able to use these
      routines in place of the slightly specialized versions they have now and
      in place of the ones in raw_bulk.c.
      0d80c6f5
    • Luc Van Oostenryck's avatar
      [PATCH] #include <linux/version.h> missing in drivers/usb/host/ohci-hcd.c · 7e5b54d4
      Luc Van Oostenryck authored
      compile fails with the following message:
      
      	> In file included from ohci-hcd.c:136:
      	> ohci-dbg.c:318: parse error
      	> make[3]: *** [ohci-hcd.o] Error 1
      
      due to a missing #include <linux/version.h>
      
      Here is a trivial patch for this.
      7e5b54d4
    • David Brownell's avatar
      [PATCH] USB shutdown oopser · 817c0217
      David Brownell authored
      is it guarenteed that callers have zero'd out the device
      before this is invoked?  Else the following is necessary to
      prevent potential OOPS's derefencing interface->dev.driver in
      the generic device layer.
      817c0217
    • David Brownell's avatar
      [PATCH] ehci-hcd: update · df42f7cf
      David Brownell authored
      Here's an EHCI update, I'll send separate patches to sync 2.4 with
      this version.  Changes in this version include:
      
        - An earlier locking update would give trouble on SPARC, where
          irqsave "flags" aren't flags.  This resolves that issue by
          adding a module parameter to limit work done with irqs off.
          (Some net drivers do the same thing.)
      
        - Optionally (now #ifdef DEBUG) collects some statistics on IRQs
          and URBs.  There are more IAA interrupts than I want to see,
          during extended usb-storage loading.
      
        - Adds a commented-out workaround for a problem I've seen on one
          VT8235.  Seems likely an issue with this specific motherboard;
          another tester hasn't reported such issues.
      
        - Includes the jiffies time_after() patch from Tim Schmielau.
      
        - Minor tweaks to the hcd portability (get rid of another #if).
      
        - Minor doc/diagnostic/... updates
      df42f7cf
    • David Brownell's avatar
      [PATCH] ohci-hcd, queue fault recovery + rm DEBUG · 65e2da7e
      David Brownell authored
      This USB patch updates the OHCI driver:
      
        - converts to relying on td_list shadowing the hardware's
          schedule; only collecting the donelist needs dma_to_td(),
          and td list handling works much like EHCI or UHCI.
      
        - leaves faulted endpoint queues (bulk/intr) disabled until
          the relevant drivers had a chance to clean up.
      
        - fixes minor bugs (unreported) in the affected code:
            * byteswap problem when unlinking urbs ... symptom would
              be data toggle confusion (since 2.4.2x) on big-endian cpus
            * latent bug if folk unlinked queue in LIFO order, not FIFO
      
        - removes unnecessary debug code; mostly de-BUG()ged
      
      The interesting fix is the "leave queues halted" one.  As
      discussed on email a while back, this HCD fault handling
      policy (also followed by EHCI) is sufficient to let device
      drivers implement the two key fault handling policies that
      seem to be necessary:
      
          (a) Datagram style, where issues on one I/O won't affect
              the next unless the device halted the endpoint.  The
              device driver can ignore most errors other than -EPIPE.
      
          (b) Stream style, where for example it'd be wrong to ever
              let block N+1 overwrite block N on the disk.  Once
              the first URB fails, the rest would just be unlinked
              in the completion handler.
      
      As a consequence of using the td_list, you can now see urb
      queuing in action in the driverfs 'async' file.  At least, if
      you look at the right time, or use drivers (networking, etc)
      that queue (bulk) reads for a long time.
      65e2da7e
    • Dave Kleikamp's avatar
      JFS: Fix off-by-one error in dbNextAG · beec14df
      Dave Kleikamp authored
      In certain situations, dbNextAG set db_agpref to db_numag, with is
      one higher than the last valid value.  This will eventually result in
      a trap.
      beec14df
    • Ingo Molnar's avatar
      [PATCH] de-xchg fork.c · 94eda096
      Ingo Molnar authored
      This fixes all xchg()'s and a preemption bug.
      94eda096
    • Ingo Molnar's avatar
      [PATCH] pidhash cleanups, tgid-2.5.38-F3 · 817fdd72
      Ingo Molnar authored
      This does the following things:
      
       - removes the ->thread_group list and uses a new PIDTYPE_TGID pid class
         to handle thread groups. This cleans up lots of code in signal.c and
         elsewhere.
      
       - fixes sys_execve() if a non-leader thread calls it. (2.5.38 crashed in
         this case.)
      
       - renames list_for_each_noprefetch to __list_for_each.
      
       - cleans up delayed-leader parent notification.
      
       - introduces link_pid() to optimize PIDTYPE_TGID installation in the
         thread-group case.
      
      I've tested the patch with a number of threaded and non-threaded
      workloads, and it works just fine. Compiles & boots on UP and SMP x86.
      
      The session/pgrp bugs reported to lkml are probably still open, they are
      the next on my todo - now that we have a clean pidhash architecture they
      should be easier to fix.
      817fdd72
    • Linus Torvalds's avatar
      Terminate a failed IO properly · 76417366
      Linus Torvalds authored
      76417366
    • Linus Torvalds's avatar
      Merge http://linux-isdn.bkbits.net/linux-2.5.isdn · 46796862
      Linus Torvalds authored
      into home.transmeta.com:/home/torvalds/v2.5/linux
      46796862