1. 09 Jul, 2007 13 commits
    • Jeff Garzik's avatar
      [libata] pdc_adma: Reorder initializers with a couple structs · 49de0ac8
      Jeff Garzik authored
      Make it easier to verify which struct initializers are present, by
      presenting them in the order in which they are defined in the API
      header.
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      49de0ac8
    • Jeff Garzik's avatar
    • Jeff Garzik's avatar
      [libata] PATA drivers: remove ATA_FLAG_SRST · 1d2808fd
      Jeff Garzik authored
      This flag only has meaning in old-EH drivers, and these drivers have
      already been converted to the new EH.  Remove.
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      1d2808fd
    • Jeff Garzik's avatar
      [libata] sata_sil: register table cleanup · 5bcd7a00
      Jeff Garzik authored
      Make the register offset table more maintainable.
      
      From the 'sii-lbt' branch, which enables the LBT chip feature.
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      5bcd7a00
    • Jens Axboe's avatar
      use_clustering (sht) bit set to 0 in AHCI ? · be5d8218
      Jens Axboe authored
      ahci: enable sg segment clustering
      
      The specification states that ahci supports segments up to 4MiB in size,
      so enable clustering.
      Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      be5d8218
    • Tejun Heo's avatar
      libata: replace ap->cbl tests with ATA_FLAG_SATA tests · a16abc0b
      Tejun Heo authored
      ap->cbl == ATA_CBL_SATA indicates SATA cable while ap->flags &
      ATA_FLAG_SATA indicates SATA host port.  Till now they always gave the
      same result but SATA/PATA bridge handling will change that.  Switch to
      ATA_FLAG_SATA test if we're testing for host port type.
      Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      a16abc0b
    • Jeff Garzik's avatar
      [libata] pata_atiixp: add SB700 PCI ID · 1ca972c2
      Jeff Garzik authored
      From AMD.
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      1ca972c2
    • Tejun Heo's avatar
      libata-acpi: implement _GTM/_STM support · 64578a3d
      Tejun Heo authored
      Implement _GTM/_STM support.  acpi_gtm is added to ata_port which
      stores _GTM parameters over suspend/resume cycle.  A new hook
      ata_acpi_on_suspend() is responsible for storing _GTM parameters
      during suspend.  _STM is executed in ata_acpi_on_resume().  With this
      change, invoking _GTF is safe on IDE hierarchy and acpi_sata check
      before _GTF is removed.
      
      ata_acpi_gtm() and ata_acpi_stm() implementation is taken from Alan
      Cox's pata_acpi implementation.  ata_acpi_gtm() is fixed such that the
      result parameter is not shifted by sizeof(union acpi_object).
      Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      64578a3d
    • Tejun Heo's avatar
      libata-acpi: remove redundant checks · e5fa24df
      Tejun Heo authored
      Remove remaining unnecessary feature and status checks.
      Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      e5fa24df
    • Tejun Heo's avatar
      libata: reimplement ACPI invocation · 6746544c
      Tejun Heo authored
      This patch reimplements ACPI invocation such that, instead of
      exporting ACPI details to the rest of libata, ACPI event handlers -
      ata_acpi_on_resume() and ata_acpi_on_devcfg() - are used.  These two
      functions are responsible for determining whether specific ACPI method
      is used and when.
      
      On resume, _GTF is scheduled by setting ATA_DFLAG_ACPI_PENDING device
      flag.  This is done this way to avoid performing the action on wrong
      device device (device swapping while suspended).
      
      On every ata_dev_configure(), ata_acpi_on_devcfg() is called, which
      performs _SDD and _GTF.  _GTF is performed only after resuming and, if
      SATA, hardreset as the ACPI spec specifies.  As _GTF may contain
      arbitrary commands, IDENTIFY page is re-read after _GTF taskfiles are
      executed.
      
      If one of ACPI methods fails, ata_acpi_on_devcfg() retries on the
      first failure.  If it fails again on the second try, ACPI is disabled
      on the device.  Note that successful configuration clears ACPI failed
      status.
      
      With all feature checks moved to the above two functions,
      do_drive_set_taskfiles() is trivial and thus collapsed into
      ata_acpi_exec_tfs(), which is now static and converted to return the
      number of executed taskfiles to be used by ata_acpi_on_resume().  As
      failures are handled properly, ata_acpi_push_id() now returns -errno
      on errors instead of unconditional zero.
      Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      6746544c
    • Tejun Heo's avatar
      libata-acpi: miscellaneous cleanups · 69b16a5f
      Tejun Heo authored
      * Add missing LOCKING: and RETURNS: to function comment.
      
      * Don't conditionalize warning messages with ata_msg_probe().  Print
        directly with KERN_WARNING.
      
      * Drop duplicate debug messages.
      Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      69b16a5f
    • Tejun Heo's avatar
      libata-acpi: clean up ata_acpi_exec_tfs() · 4700c4bc
      Tejun Heo authored
      This patch cleans up ata_acpi_exec_tfs() and its friends.
      
      * Rename taskfile_array to ata_acpi_gtf and make it __packed as it's
        used as argument to ACPI method, and use pointer to ata_acpi_gtf and
        number of taskfiles to represent _GTF taskfiles instead of a pointer
        casted into unsigned long and byte count.  This makes argument
        re-checking in do_drive_set_taskfiles() unnecessary.
      
      * Pointer in void * not in unsigned long.
      
      * Clean up do_drive_get_GTF() error handling and make
        do_drive_get_GTF() return number of taskfiles on success, 0 if _GTF
        doesn't exist or doesn't contain valid ata.  -errno on other errors.
      
      * Remove superflous check for acpi->buffer.pointer.
      
      * Update taskfile_load_raw() such that printed messages look similar
        to the messages printed by ata_eh_report().
      
      * s/do_drive_get_GTF/ata_dev_get_GTF/
        s/do_drive_set_taskfiles/ata_dev_set_taskfiles/
      Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      4700c4bc
    • Tejun Heo's avatar
      libata-acpi: implement ata_acpi_associate() · fafbae87
      Tejun Heo authored
      * Add acpi_handle to ata_host and ata_port.  Rename
        ata_device->obj_handle to ->acpi_handle and move it above such that
        it doesn't get cleared on reconfiguration.
      
      * Replace ACPI node association which ata_acpi_associate() which is
        called once during host initialization.  Unlike the previous
        implementation, ata_acpi_associate() uses ATA_FLAG_ACPI_SATA to
        choose between IDE or SATA ACPI hierarchy and uses simple child look
        up instead of recursive walk to match the nodes.  This is way safer
        and simpler.  Please read the following message for more info.
      
        http://article.gmane.org/gmane.linux.ide/17554Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      fafbae87
  2. 08 Jul, 2007 6 commits
  3. 07 Jul, 2007 4 commits
    • Adrian Bunk's avatar
      DLM must depend on SYSFS · 95511ad4
      Adrian Bunk authored
      The dependency of DLM on SYSFS got lost in
      commit 6ed7257b resulting in the
      following compile error with CONFIG_DLM=y, CONFIG_SYSFS=n:
      
      <--  snip  -->
      
      ...
        LD      .tmp_vmlinux1
      fs/built-in.o: In function `dlm_lockspace_init':
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/fs/dlm/lockspace.c:231: undefined reference to `kernel_subsys'
      fs/built-in.o: In function `configfs_init':
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/fs/configfs/mount.c:143: undefined reference to `kernel_subsys'
      make[1]: *** [.tmp_vmlinux1] Error 1
      
      <--  snip  -->
      Signed-off-by: default avatarAdrian Bunk <bunk@stusta.de>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      95511ad4
    • Dave Jones's avatar
      Clean up E7520/7320/7525 quirk printk. · 38377be8
      Dave Jones authored
      The printk level in this printk is bogus, as the previous printk
      didn't have a terminating \n resulting in ..
      
      Intel E7520/7320/7525 detected.<6>Disabling irq balancing and affinity
      
      It also never printed a \n at all in the case where we didn't do
      the quirk.
      
      Change it to only make noise if it actually does something useful.
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      38377be8
    • Adrian Bunk's avatar
      include/linux/kallsyms.h must #include <linux/errno.h> · 40e48eed
      Adrian Bunk authored
      This patch fixes the following 2.6.22 regression with CONFIG_KALLSYMS=n:
      
      <--  snip  -->
      
      ...
        CC      arch/m32r/kernel/traps.o
      In file included from /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/arch/m32r/kernel/traps.c:14:
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h: In function 'lookup_symbol_name':
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:66: error: 'ERANGE' undeclared (first use in this function)
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:66: error: (Each undeclared identifier is reported only once
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:66: error: for each function it appears in.)
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h: In function 'lookup_symbol_attrs':
      /home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/kallsyms.h:71: error: 'ERANGE' undeclared (first use in this function)
      make[2]: *** [arch/m32r/kernel/traps.o] Error 1
      
      <--  snip  -->
      Signed-off-by: default avatarAdrian Bunk <bunk@stusta.de>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      40e48eed
    • David Woodhouse's avatar
      Fix use-after-free oops in Bluetooth HID. · 1c39858b
      David Woodhouse authored
      When cleaning up HIDP sessions, we currently close the ACL connection
      before deregistering the input device. Closing the ACL connection
      schedules a workqueue to remove the associated objects from sysfs, but
      the input device still refers to them -- and if the workqueue happens to
      run before the input device removal, the kernel will oops when trying to
      look up PHYSDEVPATH for the removed input device.
      
      Fix this by deregistering the input device before closing the
      connections.
      Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
      Acked-by: default avatarMarcel Holtmann <marcel@holtmann.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1c39858b
  4. 06 Jul, 2007 17 commits
    • Christoph Lameter's avatar
      slub: remove useless EXPORT_SYMBOL · d23cf676
      Christoph Lameter authored
      kmem_cache_open is static. EXPORT_SYMBOL was leftover from some earlier
      time period where kmem_cache_open was usable outside of slub.
      
      (Fixes powerpc build error)
      Signed-off-by: default avatarChrsitoph Lameter <clameter@sgi.com>
      Cc: Johannes Berg <johannes@sipsolutions.net>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d23cf676
    • maximilian attems's avatar
      MAINTAINERS new kernel janitors ml · c3000e03
      maximilian attems authored
      davem kindly moved the list from osdl to vger.
      Signed-of-by: default avatarmaximilian attems <max@stro.at>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: Randy Dunlap <randy.dunlap@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c3000e03
    • Andres Salomon's avatar
      GEODE: reboot fixup for geode machines with CS5536 boards · 95069f89
      Andres Salomon authored
      Writing to MSR 0x51400017 forces a hard reset on CS5536-based machines,
      this has the reboot fixup do just that if such a board is detected.
      Acked-by: default avatarJordan Crouse <jordan.crouse@amd.com>
      Signed-off-by: default avatarAndres Salomon <dilinger@debian.org>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      95069f89
    • Linus Torvalds's avatar
      Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 · 1feb17e2
      Linus Torvalds authored
      * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
        [NETPOLL]: Fixups for 'fix soft lockup when removing module'
        [NET]: net/core/netevent.c should #include <net/netevent.h>
        [NETFILTER]: nf_conntrack_h323: add checking of out-of-range on choices' index values
        [NET] skbuff: remove export of static symbol
        SCTP: Add scope_id validation for link-local binds
        SCTP: Check to make sure file is valid before setting timeout
        SCTP: Fix thinko in sctp_copy_laddrs()
      1feb17e2
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus · dadde13a
      Linus Torvalds authored
      * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
        [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores
        [MIPS] Add macros to encode processor revisions.
        [MIPS] RM7000: Enable ICACHE_REFILLS_WORKAROUND_WAR.
        [MIPS] SMTC: Fix cut'n'paste bug in Kconfig.debug
        [MIPS] Change libgcc-style functions from lib-y to obj-y
        [MIPS] Fix timer/performance interrupt detection
        [MIPS] AP/SP: Avoid triggering the 34K E125 performance issue
        [MIPS] 64-bit TO_PHYS_MASK macro for RM9000 processors
      dadde13a
    • Peter Zijlstra's avatar
      mm: fixup /proc/vmstat output · 23c1fb52
      Peter Zijlstra authored
      Line up the vmstat_text with zone_stat_item
      
      enum zone_stat_item {
      	/* First 128 byte cacheline (assuming 64 bit words) */
      	NR_FREE_PAGES,
      	NR_INACTIVE,
      	NR_ACTIVE,
      
      We current have nr_active and nr_inactive reversed.
      
      [ "OK with patch, though using initializers canbe handy to prevent such
         things in future:
      
      	static const char * const vmstat_text[] = {
      		[NR_FREE_PAGES] = "nr_free_pages",
      		..."
      							 - Alexey ]
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      23c1fb52
    • Yoann Padioleau's avatar
      potential compiler error, irqfunc caller sites update · 0da2f0f1
      Yoann Padioleau authored
      In 7d12e780 David Howells performed
      this evolution:
       "IRQ: Maintain regs pointer globally rather than passing to IRQ handlers"
      
      He correctly updated many of the function definitions that were using this
      extra regs pointer parameter but forgot to update some caller sites of
      those functions.  The reason the modifications was not properly done on all
      drivers is that some drivers were rarely compiled because they are for
      AMIGA, or that some code sites were inside #ifdefs where the option is not
      set or inside #if 0.
      
      Here is the semantic patch that found the occurences
      and fixed the problem.
      
      @ rule1 @
      identifier fn;
      identifier irq, dev_id;
      typedef irqreturn_t;
      @@
      
      static irqreturn_t fn(int irq, void *dev_id)
      {
         ...
      }
      
      @@
      identifier rule1.fn;
      expression E1, E2, E3;
      @@
      
       fn(E1, E2
      -   ,E3
         )
      Signed-off-by: default avatarYoann Padioleau <padator@wanadoo.fr>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Garzik <jeff@garzik.org>
      Cc: Greg KH <greg@kroah.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0da2f0f1
    • Vivek Goyal's avatar
      i386: es7000 build breakage fix · 071922c0
      Vivek Goyal authored
      o Commit 1833d6bc broke the build if
        compiled with CONFIG_ES7000=y and CONFIG_X86_GENERICARCH=n
      
      arch/i386/kernel/built-in.o(.init.text+0x4fa9): In function `acpi_parse_madt':
      : undefined reference to `acpi_madt_oem_check'
      arch/i386/kernel/built-in.o(.init.text+0x7406): In function `smp_read_mpc':
      : undefined reference to `mps_oem_check'
      arch/i386/kernel/built-in.o(.init.text+0x8990): In function
      `connect_bsp_APIC':
      : undefined reference to `enable_apic_mode'
      make: *** [.tmp_vmlinux1] Error 1
      
      o Fix the build issue. Provided the definitions of missing functions.
      
      o Don't have ES7000 machine. Only compile tested.
      
      Cc: Len Brown <lenb@kernel.org>
      Cc: Natalie Protasevich <protasnb@gmail.com>
      Cc: Roland Dreier <rolandd@cisco.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      071922c0
    • Bjorn Helgaas's avatar
      PNP SMCf010 quirk: work around Toshiba Portege 4000 ACPI issues · 41a53114
      Bjorn Helgaas authored
      When we enable the SMCf010 IR device, the Toshiba Portege 4000 BIOS claims
      the device is working, but it really isn't configured correctly.  The BIOS
      *will* configure it, but only if we call _SRS after (1) reversing the order
      of the SIR and FIR I/O port regions and (2) changing the IRQ from
      active-high to active-low.
      
      This patch addresses the 2.6.22 regression:
          "no irda0 interface (2.6.21 was OK), smsc does not find chip"
      
      I tested this on a Portege 4000.  The smsc-ircc2 driver correctly detects
      the device, and "irattach irda0 -s && irdadump" shows transmitted and
      received packets.
      Signed-off-by: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
      Cc: Andrey Borzenkov <arvidjaar@mail.ru>
      Cc: Samuel Ortiz <samuel@sortiz.org>
      Cc: "Linus Walleij (LD/EAB)" <linus.walleij@ericsson.com>
      Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
      Cc: Adam Belay <ambx1@neo.rr.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      41a53114
    • Alexander Graf's avatar
      fix logic error in ipc compat semctl() · d57d9731
      Alexander Graf authored
      When calling a semctl(IPC_STAT) without IPC_64 the check if the memory is
      unevaluated.  This patch fixes this.
      Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d57d9731
    • David Woodhouse's avatar
      x86_64: fix headers_install · 0db19c41
      David Woodhouse authored
      A bug in headers_install for ARCH=x86_64 yields an asm/ directory full of
      files all of which are using the same #ifdef guard, "__ASM_STUB_" with no
      postfix.  So the second and later asm files #included in the same C file
      (often through standard headers like ioctl.h) yields no symbols.
      
      Strangeness with the Ubuntu 'tell me if I support something that's not
      explcitly mentioned in POSIX, and I'll strip it out' shell, I believe.
      
      We don't need the 'export' but we do need a semicolon at the end of the
      FNAME line:
      Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
      Signed-off-by: default avatarRob Landley <rob@landley.net>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0db19c41
    • Loic Prylli's avatar
      MTRR: Fix race causing set_mtrr to go into infinite loop · d25c1ba2
      Loic Prylli authored
      Processors synchronization in set_mtrr requires the .gate field to be set
      after .count field is properly initialized.  Without an explicit barrier,
      the compiler was reordering those memory stores.  That was sometimes
      causing a processor (in ipi_handler) to see the .gate change and decrement
      .count before the latter is set by set_mtrr() (which then hangs in a
      infinite loop with irqs disabled).
      Signed-off-by: default avatarLoic Prylli <loic@myri.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d25c1ba2
    • Jason Wessel's avatar
      i386: fix regression, endless loop in ptrace singlestep over an int80 · 1e2e99f0
      Jason Wessel authored
      The commit 635cf99a introduced a
      regression.  Executing a ptrace single step after certain int80
      accesses will infinitely loop and never advance the PC.
      
      The TIF_SINGLESTEP check should be done on the return from the syscall
      and not before it.
      
      I loops on each single step on the pop right after the int80 which writes out
      to the console.  At that point you can issue as many single steps as you want
      and it will not advance any further.
      
      The test case is below:
      
      /* Test whether singlestep through an int80 syscall works.
       */
      #define _GNU_SOURCE
      #include <stdio.h>
      #include <unistd.h>
      #include <fcntl.h>
      #include <sys/ptrace.h>
      #include <sys/wait.h>
      #include <sys/mman.h>
      #include <asm/user.h>
      #include <string.h>
      
      static int child, status;
      static struct user_regs_struct regs;
      
      static void do_child()
      {
      	char str[80] = "child: int80 test\n";
      
      	ptrace(PTRACE_TRACEME, 0, 0, 0);
      	kill(getpid(), SIGUSR1);
      	write(fileno(stdout),str,strlen(str));
      	asm ("int $0x80" : : "a" (20)); /* getpid */
      }
      
      static void do_parent()
      {
      	unsigned long eip, expected = 0;
      again:
      	waitpid(child, &status, 0);
      	if (WIFEXITED(status) || WIFSIGNALED(status))
      		return;
      
      	if (WIFSTOPPED(status)) {
      		ptrace(PTRACE_GETREGS, child, 0, &regs);
      		eip = regs.eip;
      		if (expected)
      			fprintf(stderr, "child stop @ %08lx, expected %08lx %s\n",
      					eip, expected,
      					eip == expected ? "" : " <== ERROR");
      
      		if (*(unsigned short *)eip == 0x80cd) {
      			fprintf(stderr, "int 0x80 at %08x\n", (unsigned int)eip);
      			expected = eip + 2;
      		} else
      			expected = 0;
      
      		ptrace(PTRACE_SINGLESTEP, child, NULL, NULL);
      	}
      	goto again;
      }
      
      int main(int argc, char * const argv[])
      {
      	child = fork();
      	if (child)
      		do_parent();
      	else
      		do_child();
      	return 0;
      }
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: <stable@kernel.org>
      Cc: Chuck Ebbert <76306.1226@compuserve.com>
      Acked-by: default avatarAndi Kleen <ak@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1e2e99f0
    • Michael Ellerman's avatar
      Fix elf_core_dump() when writing arch specific notes (spu coredumps) · ef7320ed
      Michael Ellerman authored
      elf_core_dump() supports dumping arch specific ELF notes, via the #define
      ELF_CORE_WRITE_EXTRA_NOTES.  Currently the only user of this is the powerpc
      spu coredump code.
      
      There is a bug in the handling of foffset WRT the arch notes, which causes
      us to erroneously increment foffset by the size of the arch notes, leaving
      a block of zeroes in the file, and causing all subsequent data in the file
      to be at <supposed position> + <arch note size>.  eg:
      
        LOAD  0x050000 0x00100000 0x00000000 0x20000 0x20000 R E 0x10000
      
      Tells us we should have a chunk of data at 0x50000.  The truth is the data
      is at 0x90dbc = 0x50000 + 0x40dbc (the size of the arch notes).
      
      This bug prevents gdb from reading the core file correctly.
      
      The simplest fix is to simply remember the size of the arch notes, and add
      it to foffset after we've written the arch notes.  The only drawback is
      that if the arch code doesn't write as many bytes as it said it would, we
      end up with a broken core dump again.  For now I think that's a reasonable
      requirement.
      
      Tested on a Cell blade, gdb no longer complains about the core file being
      bogus.
      
      While I'm here I should point out that the spu coredump code does not work
      if we're dumping to a pipe - we'll have to wait for 23 to fix that.
      Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
      Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Acked-by: default avatarPaul Mackerras <paulus@samba.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ef7320ed
    • Ralf Baechle's avatar
      [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores · 4b3e975e
      Ralf Baechle authored
      The idle loop goes to sleep using the WAIT instruction if !need_resched().
      This has is suffering from from a race condition that if if just after
      need_resched has returned 0 an interrupt might set TIF_NEED_RESCHED but
      we've just completed the test so go to sleep anyway.  This would be
      trivial to fix by just disabling interrupts during that sequence as in:
      
              local_irq_disable();
              if (!need_resched())
                      __asm__("wait");
              local_irq_enable();
      
      but the processor architecture leaves it undefined if a processor calling
      WAIT with interrupts disabled will ever restart its pipeline and indeed
      some processors have made use of the freedom provided by the architecture
      definition.  This has been resolved and the Config7.WII bit indicates that
      the use of WAIT is safe on 24K, 24KE and 34K cores.  It also is safe on
      74K starting revision 2.1.0 so enable the use of WAIT with interrupts
      disabled for 74K based on a c0_prid of at least that.
      Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      4b3e975e
    • Ralf Baechle's avatar
      [MIPS] Add macros to encode processor revisions. · fde97822
      Ralf Baechle authored
      Older processors used to encode processor version and revision in two
      4-bit bitfields, the 4K seems to simply count up and even newer MTI cores
      have switched to use the 8-bits as 3:3:2 bitfield with the last field as
      the patch number.
      Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      fde97822
    • Ralf Baechle's avatar
      [MIPS] RM7000: Enable ICACHE_REFILLS_WORKAROUND_WAR. · 075c733e
      Ralf Baechle authored
      The RM7000 processors and the E9000 cores have a bug (though PMC-Sierra
      opposes it being called that) where invalid instructions in the same
      I-cache line worth of instructions being fetched may case spurious
      exceptions.
      
      The workaround for this was only enabled for E9000 cores; enable it also
      for all RM7000-based platforms.
      Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      075c733e