In my revamp of the x86 ptrace code for setting register values,
I accidentally omitted a check that was there in the old code.
Allowing %cs to be 0 causes a bad crash in recovery from iret failure.
This patch fixes that regression against 2.6.24, and adds a comment
that should help prevent this subtlety from being overlooked again.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

based on similar patch from: Pavel Machek <pavel@ucw.cz>

Introduce CONFIG_COMPAT_BRK. If disabled then the kernel is free
(but not obliged to) randomize the brk area.

Heap randomization breaks ancient binaries, so we keep COMPAT_BRK
enabled by default.
Signed-off-by: Ingo Molnar <mingo@elte.hu>

There is a check in sys_brk(), that tries to make sure that we do not
underflow the area that is dedicated to brk heap.

The check is however wrong, as it assumes that brk area starts immediately
after the end of the code (+bss), which is wrong for example in
environments with randomized brk start. The proper way is to check whether
the address is not below the start_brk address.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

With the spurious handler fix, the X2 does not lock up anymore.
Signed-off-by: Ingo Molnar <mingo@elte.hu>

In very rare cases, on certain CPUs, we could end up in the spurious
fault handler and ignore a large pud/pmd mapping. The resulting pte
pointer points into the mapped physical space and dereferencing it
will fault recursively.

Make the code aware of large mappings and do the permission check
on the pmd/pud entry, when a large pud/pmd mapping is detected.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Unify the x86-64 behavior for 32-bit processes that set
bogus %cs/%ss values (the only ones that can fault in iret)
match what the native i386 behavior is. (do not kill the task
via do_exit but generate a SIGSEGV signal)

[ tglx@linutronix.de: build fix ]
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (29 commits)
  ide-tape: bump minor driver version
  ide-tape: cleanup the remaining codestyle issues
  ide-tape: fix syntax error in idetape_identify_device()
  ide-tape: remove leftover OnStream support warning
  ide-tape: collect module-related macro calls at the end
  ide-tape: include proper headers
  ide-tape: remove unused "length" arg from idetape_create_read_buffer_cmd()
  ide-tape: remove struct idetape_id_gcw
  ide-tape: cleanup and fix comments
  ide-tape: shorten some function names
  ide-tape: remove idetape_increase_max_pipeline_stages()
  ide-tape: struct idetape_tape_t: shorten member names v2
  ide-tape: struct idetape_tape_t: remove unused members
  ide-tape: remove typedef idetape_chrdev_direction_t
  ide-tape: simplify code branching in the interrupt handler
  ide-tape: remove unreachable code chunk
  ide-tape: remove struct idetape_read_position_result_t
  ide-tape: refactor the debug logging facility
  ide: add ide_read_error() inline helper
  ide: add ide_read_[alt]status() inline helpers
  ...

* 'dmapool' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc:
  pool: Improve memory usage for devices which can't cross boundaries
  Change dmapool free block management
  dmapool: Tidy up includes and add comments
  dmapool: Validate parameters to dma_pool_create
  Avoid taking waitqueue lock in dmapool
  dmapool: Fix style problems
  Move dmapool.c to mm/ directory

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

... thus decreasing checkpatch.pl errors to 0.

Bart:
- remove needless function prototypes while at it
- remove needless parentheses while at it
- add missing KERN_ level to ide_tape_probe()
- other minor fixups
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Spotted by Sergei Shtylyov.

CC: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Also, remove redundant ones and cleanup whitespace.

Bart:
- minor fixups
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This function was being used only at one place so fold it in there.
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Shorten some member names not too aggressively since this driver might be gone
anyway soon.

Bart:
- minor fixes
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

- last_frame_position: only being written to once
- firmware_revision, product_id, vendor_id: used once, remove from struct
  idetape_tape_t and deal with them locally
- firmware_revision_num: only written to once
- tape_still_time_begin: completely unused
- tape_still_time: never written to; remove corresponding code chunk
- uncontrolled_last_pipeline_head: only once written to
- blocks_in_buffer: only written to
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

.. and replace it with plain enums.
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

... by adding a new typedef function pointer idetape_io_buf in order to call
the proper buffer i/o handler depending on the data direction.

Bart:
- move idetape_io_buf before idetape_pc_intr() comment
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

tape->speed_control is set to 1 in idetape_setup(), but, in calculate_speeds()
its value is tested for being 0, 1, or 2. Remove the if-branches where
tape->speed_control != 1 since they are never executed. Also, rename
calculate_speeds() by adding driver's prefix as is with the other function
names.
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

There should be no functional changes resulting from this patch.

Bart:
- remove needless "!!"
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Teach the debug logging macro to differentiate between log levels based on the
type of debug level enabled specifically instead of a threshold-based one.
Thus, convert tape->debug_level to a bitmask that is written to over /proc.

Also,
- cleanup and simplify the debug macro thus removing a lot of code lines,
- get rid of unused debug levels,
- adjust the loglevel at several places where it was simply missing (e.g.
  idetape_chrdev_open())
- move the tape ptr initialization up in idetape_chrdev_open() so that we can
  use it in the debug_log macro earlier in the function.
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

ide-cris.c:
* Add cris_setup_ports() helper and use it instead of ide_setup_ports()
  (fixes random value being set in ->io_ports[IDE_IRQ_OFFSET]).

buddha.c:
* Add buddha_setup_ports() helper and use it instead of ide_setup_ports().

falconide.c:
* Add falconide_setup_ports() helper and use it instead of ide_setup_ports(),
  also fix return value of falconide_init() while at it.

gayle.c:
* Add gayle_setup_ports() helper and use it instead of ide_setup_ports().

macide.c:
* Add macide_setup_ports() helper and use it instead of ide_setup_ports()
  (fixes incorrect value being set in ->io_ports[IDE_IRQ_OFFSET]).

q40ide.c:
* Fix q40_ide_setup_ports() comments.

ide.c:
* Remove no longer needed ide_setup_ports().

Cc: Mikael Starvik <starvik@axis.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Same BUG_ON() is present inside ide_set_handler().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Remove write-only ->sata_misc[] from ide_hwif_t.

* Remove no longer used SATA_{MISC,PHY,IEN}_OFFSET defines.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Replace incorrect CONFIG_BLK_DEV_IDE #ifdef in
  check_media_bay() by CONFIG_MAC_FLOPPY one.

* Replace incorrect CONFIG_BLK_DEV_IDE #ifdef-s by
  CONFIG_BLK_DEV_IDE_PMAC ones.

* check_media_bay() is used only by drivers/block/swim3.c
  so make this function available only if CONFIG_MAC_FLOPPY
  is defined.

* check_media_bay_by_base() and media_bay_set_ide_infos()
  are used only by drivers/ide/ppc/pmac.c so so make these
  functions available only if CONFIG_MAC_FLOPPY is defined.

v2:
* Remove ifdefs from function prototypes. (Andrew Morton)

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

with module_param macro, the __setup code can be killed now:
	const __setup("all-generic-ide", ide_generic_all_on);

and the module name "generic.ko" is not descriptive to its functionality,
can be changed in Makefile, the "ide-pci-generic.ko" is better.

the ide-pci-generic.all-generic-ide parameter also documented
in Documentation/kernel-parameters.txt
Signed-off-by: Denis Cheng <crquan@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/legacy/hd.c: In function 'hd_request':
drivers/ide/legacy/hd.c:424: warning: 'stat' may be used uninitialized in this function

gcc is being stupid.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-acpi.c: In function 'ide_acpi_init':
drivers/ide/ide-acpi.c:175: warning: 'dev_handle' may be used uninitialized in this function
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This is Palmchip BK3710 IDE controller support.

The IDE controller logic supports PIO, MultiWord-DMA and Ultra-DMA modes.
Supports interface to Compact Flash (CF) configured in True-IDE mode.

Bart:
- remove dead code
- fix ide_hwif_setup_dma() build problem
Signed-off-by: Anton Salnikov <asalnikov@ru.mvista.com>
Reviewed-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Reviewed-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

On Tuesday 05 February 2008, Linus Torvalds wrote:
> 
> On Sat, 2 Feb 2008, Bartlomiej Zolnierkiewicz wrote:
> > 
> > * next part of IDE probing code re-organization saga
> >   (that would be me)
> 
> This seems to cause very irritating and bogus messages for me:
> 
>       Probing IDE interface ide0...
>       Probing IDE interface ide1...
>       ide2: I/O resource 0x0-0x7 not free.
>       ide2: ports already in use, skipping probe
>       ide3: I/O resource 0x0-0x7 not free.
>       ide3: ports already in use, skipping probe
>       ide4: I/O resource 0x0-0x7 not free.
>       ide4: ports already in use, skipping probe
>       ide5: I/O resource 0x0-0x7 not free.
>       ide5: ports already in use, skipping probe
>       ide6: I/O resource 0x0-0x7 not free.
>       ide6: ports already in use, skipping probe
>       ide7: I/O resource 0x0-0x7 not free.
>       ide7: ports already in use, skipping probe
>       ide8: I/O resource 0x0-0x7 not free.
>       ide8: ports already in use, skipping probe
>       ide9: I/O resource 0x0-0x7 not free.
>       ide9: ports already in use, skipping probe
> 
> and that's just totally bogus. It shouldn't even request that region, 
> since it's not been allocated!

The commit 139ddfca ("ide: move handling of
I/O resources out of ide_probe_port()") changed the ordering of hwif->noprobe
check vs ide_hwif_request_regions() call (so that we now reserve I/O regions
before checking for hwif->noprobe).  However ide-generic host driver depended
on hwif->noprobe to be set for skipping probing of empty ide_hwifs[] slots.

Fix it by passing only indexes of non-empty slots to ide_device_add_all()
from ide_generic_init().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

smbfs is a bit buggy and has no maintainer.  Change it to shout at the user on
the first five mount attempts - tell them to switch to CIFS.

Come December we'll mark it BROKEN and see what happens.

[olecom@flower.upol.cz: documentation update]
Cc: Urban Widmark <urban@teststation.com>
Acked-by: Steven French <sfrench@us.ibm.com>
Signed-off-by: Oleg Verych <olecom@flower.upol.cz>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Cc: David Howells <dhowells@redhat.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Richard Curnow <rc@rc0.org.uk>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>