The database performance group have found that half the cycles spent
in kmem_cache_free are spent in this one call to BUG_ON.  Moving it
into the CONFIG_SLAB_DEBUG-only function cache_free_debugcheck() is a
performance win of almost 0.5% on their particular benchmark.

The call was added as part of commit ddc2e812
with the comment that "overhead should be minimal".  It may have been
minimal at the time, but it isn't now.

[ Quoth Pekka Enberg: "I don't think the BUG_ON per se caused the
  performance regression but rather the virt_to_head_page() changes to
  virt_to_cache() that were added later." ]
Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
Acked-by: NPekka J Enberg <penberg@cs.helsinki.fi>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup:
  x86 setup: don't recalculate ss:esp unless really necessary

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  sdio_uart: fix sign of paramter status in sdio_uart_receive_chars()

This also fixes a sparse warning about different signedness.
Only compile tested, because i do not have the hardware.
Signed-off-by: NAndre Haupt <andre@bitwigglers.org>
Acked-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Subdividing the paravirt_ops structure caused a regression in certain
non-GPL modules which try to use mmu_ops and cpu_ops.  This restores the
old behaviour, and makes it consistent with the non-CONFIG_PARAVIRT case.

Takashi Iwai <tiwai@suse.de> adds:
> I took at this problem (as I have an nvidia card on one of my
> workstations), and found out that the following suffer from
> EXPORT_SYMBOL_GPL changes:
>
> * local_disable_irq(), local_irq_save*(), etc.
> * MSR-related macros like rdmsr(), wrmsr(), read_cr0(), etc.
>   wbinvd(), too.
> * pmd_val(), pgd_val(), etc are all involved with pv_mm_ops.
>   pmd_large() and pmd_bad() is also indirectly involved.
>   __flush_tlb() and friends suffer, too.

Christoph Hellwig objects to this patch on the grounds that modules
shouldn't be using these operations anyway.  I don't think this is a
particularly good reason to reject the patch, for several reasons:

1. These operations are still available to modules when not using
   CONFIG_PARAVIRT, since they are implicitly exported as inline
   functions via the kernel headers.  Exporting the same functionality as
   GPL-only symbols just adds a gratuitious difference between
   CONFIG_PARAVIRT and non-CONFIG_PARAVIRT configurations.  If we really
   think these operations are not for module use (or non-GPL module use),
   then we should solve the problem in a general way.

2. It's a regression from previous kernels, which would work these
   modules even with CONFIG_PARAVIRT enabled.

3. The operations in question seem pretty reasonable for modules to
   use.  The control registers/MSRs can be accessed directly anyway, so there's
   no benefit in preventing modules from using standard interfaces.  And it seems
   reasonable to allow a graphics driver to create its own mappings if it wants.

Therefore, I think this patch should go in for 2.6.24.  If people
really think that these operations should not be available to modules,
then we can address that separately.
Signed-off-by: NJeremy Fitzhardinge <Jeremy.Fitzhardinge@citrix.com>
Cc: Tobias Powalowski <t.powa@gmx.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Keep lguest from being enabled on VISWS or VOYAGER configs, just as is
already done for VMI and XEN.  Otherwise randconfigs with VISWS and LGUEST
have this problem:

In file included from arch/x86/kernel/setup_32.c:61:
include/asm-x86/mach-visws/setup_arch.h:8:1: warning: "ARCH_SETUP" redefined
In file included from include/asm/msr.h:80,
                 from include/asm/processor_32.h:17,
                 from include/asm/processor.h:2,
                 from include/asm/thread_info_32.h:16,
                 from include/asm/thread_info.h:2,
                 from include/linux/thread_info.h:21,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:49,
                 from include/linux/seqlock.h:29,
                 from include/linux/time.h:8,
                 from include/linux/timex.h:57,
                 from include/linux/sched.h:53,
                 from arch/x86/kernel/setup_32.c:24:
include/asm/paravirt.h:458:1: warning: this is the location of the previous definition

(and of course, this happens because kconfig does not follow dependencies
when [evil] select is used...)
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

ACPI uses NR_CPUS in various loops and in some it accesses per cpu data of
processors that are not present(!) and that will never be present.

The pointers to per cpu data are typically not initialized for processors
that are not present.  So we seem to be reading something here from offset
0 in memory.

Make ACPI use nr_cpu_ids instead. That stops at the end of the possible
processors.

Convert one loop to NR_CPUS to use the cpu_possible map instead.  That way
ranges of processor that can never be brought online are skipped during the
loop.
Signed-off-by: NChristoph Lameter <clameter@sgi.com>
Cc: Len Brown <lenb@kernel.org>
Acked-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Make them depend on TCGETS2.  If that one is implemented the rest should be
there as well.
Acked-by: NAlan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

In wait_task_stopped() exit_code already contains the right value for the
si_status member of siginfo, and this is simply set in the non WNOWAIT
case.

If you call waitid() with a stopped or traced process, you'll get the signal
in siginfo.si_status as expected -- however if you call waitid(WNOWAIT) at the
same time, you'll get the signal << 8 | 0x7f

Pass it unchanged to wait_noreap_copyout(); we would only need to shift it
and add 0x7f if we were returning it in the user status field and that
isn't used for any function that permits WNOWAIT.
Signed-off-by: NScott James Remnant <scott@ubuntu.com>
Signed-off-by: NOleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Arrange the sections in the FRV arch so that a BRA instruction with a
16-bit displacement can always reach from the trap table to entry.S,
tlb-miss.S and break.S.

The problem otherwise is that the linker can insert sufficient code between
the slots in the trap table and the targets of the branch instructions in
those slots that the displacement field in the instruction isn't
sufficiently large.  This is because the branch targets were in the .text
section along with most of the other code in the kernel.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix the extern declaration of kallsyms_num_syms to indicate that the symbol
does not reside in the small-data storage space, and so may not be accessed
relative to the small data base register.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

RTC code is using mutex to assure exclusive access to /dev/rtc.  This is
however wrong usage, as it leaves the mutex locked when returning into
userspace, which is unacceptable.

Convert rtc->char_lock into bit operation.
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
Acked-by: NAlessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Invalidate attributes on rename, since some filesystems may update
st_ctime.  Reported by Szabolcs Szakacsits
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

I found problems accessing (executing) previously existing files, until
I did chmod on them (or setattr).

If the fi->attr_version is not initialized, then it could be
larger than fc->attr_version until a setattr is executed, and as a
result the inode attributes would never be set.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

FUSE_FILE_OPS is meant to signal that the kernel will send the open file to to
the userspace filesystem for operations on open files, so that sillyrenaming
unlinked files becomes unnecessary.

However this needs VFS changes, which won't make it into 2.6.24.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Some open flags (O_APPEND, O_DIRECT) can be changed with fcntl(F_SETFL, ...)
after open, but fuse currently only sends the flags to userspace in open.

To make it possible to correcly handle changing flags, send the
current value to userspace in each read and write.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Extract repeated code into helper function, as suggested by Akpm.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Currently reading a fuse file will stop at cached i_size and return
EOF, even though the file might have grown since the attributes were
last updated.

So detect if trying to read past EOF, and refresh the attributes
before continuing with the read.

Thanks to mpb for the report.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Changes __meminit to __init_refok.

WARNING: vmlinux.o(.text+0x1d07c): Section mismatch: reference to
.init.text:find_e820_area (between 'init_memory_mapping' and 'arch_add_memory')
Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fixes section mismatch below.

WARNING: vmlinux.o(.text+0x946b5): Section mismatch: reference to .init.text:'
__alloc_bootmem_node (between 'vmemmap_alloc_block' and 'vmemmap_pgd_populate')
Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch adds document for EFI x86_64 boot support.  The setup and operation
guide of EFI based system is documented in Documentation/x86_64/uefi.txt.
Signed-off-by: NChandramouli Narayanan <mouli@linux.intel.com>
Signed-off-by: NHuang Ying <ying.huang@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch adds Graphics Output Protocol support to the kernel.  UEFI2.0 spec
deprecates Universal Graphics Adapter (UGA) protocol and only Graphics Output
Protocol (GOP) is produced.  Therefore, the boot loader needs to query the
UEFI firmware with appropriate Output Protocol and pass the video information
to the kernel.  As a result of GOP protocol, an EFI framebuffer driver is
needed for displaying console messages.  The patch adds a EFI framebuffer
driver.  The EFI frame buffer driver in this patch is based on the Intel Mac
framebuffer driver.

The ELILO bootloader takes care of passing the video information as
appropriate for EFI firmware.

The framebuffer driver has been tested in i386 kernel and x86_64 kernel on EFI
platform.
Signed-off-by: NChandramouli Narayanan <mouli@linux.intel.com>
Signed-off-by: NHuang Ying <ying.huang@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Revert 7eea4364.

Lucy said:

  This patch will work with the 19HS but WILL BREAK all other Keyspan
  adapters.  It will take me a few days to get to looking at a correct fix but
  that keyspan_send_setup(port, 1) (and the '1' is the important part) must
  happen once when the port is first opened.  The cflag can just be set to
  whatever the normal default is for your serial environment.

So revert this again pending the proper fix.

Cc: Borislav Petkov <bbpetkov@yahoo.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Lucy McCoy <lucy@keyspan.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Cc: Edgar Hucek <hostmaster@ed-soft.at>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

With NO_HZ disabled, the UML idle loop effectively becomes a busy loop, as
it will sleep for no time.

The cause was forgetting to restart the tick after waking up from sleep.
It was disabled before sleeping, and the remaining time used as the
interval to sleep.  So, the tick needs to be restarted when nanosleep
finishes.

This is done by introducing after_sleep_interval, which is empty in the
NO_HZ case, but which sets the tick starting in the !NO_HZ case.
Signed-off-by: NJeff Dike <jdike@linux.intel.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

got this HiSax bootup crash on a "make randconfig" bzImage bootup:

 Calling initcall 0xc0bb1320: HiSax_init+0x0/0x380()
 HiSax: Linux Driver for passive ISDN cards
 HiSax: Version 3.5 (kernel)
 HiSax: Layer1 Revision 2.46.2.5
 HiSax: Layer2 Revision 2.30.2.4
 HiSax: TeiMgr Revision 2.20.2.3
 HiSax: Layer3 Revision 2.22.2.3
 HiSax: LinkLayer Revision 2.59.2.4
 HiSax: Total 1 card defined
 HiSax: Card 1 Protocol EDSS1 Id=HiSax (0)
 HiSax: HFC-S driver Rev. 1.10.2.4
 HFCS: defined at 0x500 IRQ 5 HZ 250
 Teles 16.3c: IRQ 5 count 0
 HFCS: resetting card
 Teles 16.3c: IRQ 5 count 0
 Teles 16.3c: IRQ(5) getting no interrupts during init 1
 HFCS: resetting card
 ------------[ cut here ]------------
 kernel BUG at include/linux/timer.h:145!
 invalid opcode: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
 Modules linked in:

 Pid: 1, comm: swapper Not tainted (2.6.24-rc3 #2045)
 EIP: 0060:[<c063afbf>] EFLAGS: 00010286 CPU: 0
 EIP is at hfcs_card_msg+0x15f/0x180
 EAX: c0cf2e5c EBX: 000000f2 ECX: 00000000 EDX: ffff1193
 ESI: f76e8000 EDI: f76e8000 EBP: f7c23ec4 ESP: f7c23eac
  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
 Process swapper (pid: 1, ti=f7c22000 task=f7c0e000 task.ti=f7c22000)
 Stack: 00000000 f7c23ec4 c011703b 00000002 f76e8000 00000000 f7c23ef8 c060c3e5
        c0a7c9c0 c0a315dc 00000005 00000001 00000000 f7c23f34 00000000 c0b5c9c0
        f7c23f34 00000000 c0f5a8e0 f7c23f80 c0bb154f 00000000 00000001 c0a9b5b9
 Call Trace:
  [<c010339a>] show_trace_log_lvl+0x1a/0x40
  [<c0103469>] show_stack_log_lvl+0xa9/0xe0
  [<c010355f>] show_registers+0xbf/0x200
  [<c01037a4>] die+0x104/0x220
  [<c0103943>] do_trap+0x83/0xc0
  [<c0103ca8>] do_invalid_op+0x88/0xa0
  [<c083621a>] error_code+0x6a/0x70
  [<c060c3e5>] checkcard+0x4a5/0x620
  [<c0bb154f>] HiSax_init+0x22f/0x380
  [<c0b867b7>] kernel_init+0x97/0x2a0
  [<c0102f87>] kernel_thread_helper+0x7/0x20
  =======================
 Code: e8 43 ae ff 8b 57 3c 85 d2 0f 84 ef fe ff ff b8 a0 99 ad c0 b9 02 00 00 00 e8 ce 11 ae ff 83 c4 0c b8 00 00 00 00 5b 5e 5f c9 c3 <0f> 0b eb fe 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
 EIP: [<c063afbf>] hfcs_card_msg+0x15f/0x180 SS:ESP 0068:f7c23eac
 Kernel panic - not syncing: Attempted to kill init!

The box has no HiSax card installed.

the reason for the crash is add_timer() done on an already running
timer. This happens because for some reason CARD_INIT is called twice.

this patch works this problem around by using mod_timer() - this gets
a booting system - but it would be nice to figure out why CARD_INIT
is done twice.

the ISDN config section (generated via make randconfig) is this:

#
# ISDN feature submodules
#
# CONFIG_ISDN_DRV_LOOP is not set
CONFIG_ISDN_DIVERSION=y

#
# ISDN4Linux hardware drivers
#

#
# Passive cards
#
CONFIG_ISDN_DRV_HISAX=y

#
# D-channel protocol features
#
CONFIG_HISAX_EURO=y
CONFIG_DE_AOC=y
# CONFIG_HISAX_NO_SENDCOMPLETE is not set
# CONFIG_HISAX_NO_LLC is not set
# CONFIG_HISAX_NO_KEYPAD is not set
CONFIG_HISAX_1TR6=y
CONFIG_HISAX_NI1=y
CONFIG_HISAX_MAX_CARDS=8

#
# HiSax supported cards
#
CONFIG_HISAX_16_0=y
# CONFIG_HISAX_16_3 is not set
# CONFIG_HISAX_TELESPCI is not set
CONFIG_HISAX_S0BOX=y
# CONFIG_HISAX_AVM_A1 is not set
CONFIG_HISAX_FRITZPCI=y
CONFIG_HISAX_AVM_A1_PCMCIA=y
CONFIG_HISAX_ELSA=y
CONFIG_HISAX_IX1MICROR2=y
CONFIG_HISAX_DIEHLDIVA=y
# CONFIG_HISAX_ASUSCOM is not set
# CONFIG_HISAX_TELEINT is not set
CONFIG_HISAX_HFCS=y
# CONFIG_HISAX_SEDLBAUER is not set
CONFIG_HISAX_SPORTSTER=y
# CONFIG_HISAX_MIC is not set
# CONFIG_HISAX_NETJET is not set
# CONFIG_HISAX_NETJET_U is not set
# CONFIG_HISAX_NICCY is not set
# CONFIG_HISAX_ISURF is not set
# CONFIG_HISAX_HSTSAPHIR is not set
# CONFIG_HISAX_BKM_A4T is not set
# CONFIG_HISAX_SCT_QUADRO is not set
# CONFIG_HISAX_GAZEL is not set
# CONFIG_HISAX_HFC_PCI is not set
# CONFIG_HISAX_W6692 is not set
# CONFIG_HISAX_HFC_SX is not set
# CONFIG_HISAX_DEBUG is not set

#
# HiSax PCMCIA card service modules
#

#
# HiSax sub driver modules
#
CONFIG_HISAX_ST5481=y
CONFIG_HISAX_HFCUSB=y
# CONFIG_HISAX_HFC4S8S is not set
CONFIG_HISAX_FRITZ_PCIPNP=y
CONFIG_HISAX_HDLC=y

#
# Active cards
#
CONFIG_ISDN_DRV_ICN=m
CONFIG_ISDN_DRV_PCBIT=m
CONFIG_ISDN_DRV_SC=y
# CONFIG_ISDN_DRV_ACT2000 is not set
CONFIG_HYSDN=m
# CONFIG_ISDN_DRV_GIGASET is not set
# CONFIG_ISDN_CAPI is not set
CONFIG_PHONE=y
CONFIG_PHONE_IXJ=m
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Cc: Karsten Keil <kkeil@suse.de>
Cc: Kai Germaschewski <kai@germaschewski.name>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

An unprivileged process must be able to kill a setuid root program started
by the same user.  This is legacy behavior needed for instance for xinit to
kill X when the window manager exits.

When an unprivileged user runs a setuid root program in !SECURE_NOROOT
mode, fP, fI, and fE are set full on, so pP' and pE' are full on.  Then
cap_task_kill() prevents the user from signaling the setuid root task.
This is a change in behavior compared to when
!CONFIG_SECURITY_FILE_CAPABILITIES.

This patch introduces a special check into cap_task_kill() just to check
whether a non-root user is signaling a setuid root program started by the
same user.  If so, then signal is allowed.
Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
Cc: Andrew Morgan <morgan@kernel.org>
Cc: Stephen Smalley <sds@epoch.ncsc.mil>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: James Morris <jmorris@namei.org>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

As Herbert Xu pointed out, bytes (chars) with bit 7 (0x80) set are true
with isprint() but they may not be isascii() but be Unicode instead, so
don't try to print them in hex dumps.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

In commit a686cd89:

 "Val's cross-port of the ext3 reservations code into ext2."

include/linux/ext2_fs.h got a new function whose return value is only
defined if __KERNEL__ is defined. Putting #ifdef __KERNEL__ around the
function seems to help, patch below.
Signed-off-by: NEric Sandeen <sandeen@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

 - fix lockup when switching from early console to real console
 - make sysrq reliable
 - fix panic, if sysrq is issued before console is opened
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: NRalf Baechle <ralf@linux-mips.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch corrects recently changed (and now invalid) Kconfig descriptions
for the DMA engine framework:

 - Non-Intel(R) hardware also has DMA engines;
 - DMA is used for more than memcpy and RAID offloading.

In fact, on most platforms memcpy and RAID aren't factors, and DMA
exists so that peripherals can transfer data to/from memory while
the CPU does other work.
Signed-off-by: NHaavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch adds an additional loop, that delays turning off the DMA
until the LCDC core has been turned off. This prevents the picture
to be shifted some random length when the kernel re-initializes
the LCDC.

Without this patch, the LCDC keeps running for some small time after the
PWRCON:LCD_PWR has been cleared ; the FIFO suffers an underrun and on
re-starting the LCDC the FIFO data stays shifted.

This behavior has been seen and fixed on AT91SAM9261-EK and two custom
AT91SAM9261 boards, all of them having different LCD panels.

Thanks a lot to Anti Sullin for submitting this patch (long
time ago).
Signed-off-by: NAnti Sullin <anti.sullin@artecdesign.ee>
Signed-off-by: NAndrew Victor <andrew@sanpeople.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NHaavard Skinnemoen <hskinnemoen@atmel.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

People discuss how the namespaces are working/going-to-work together.

Ted Ts'o proposed to create some document that describes what problems user
may have when he/she creates some new namespace, but keeps others shared.
I liked this idea, so here's the initial version of such a document with
the problems I currently have in mind and can describe somewhat audibly -
the "namespaces compatibility list".

The Documentation/namespaces/ directory is about to contain more docs about
the namespaces stuff.

Thanks to Cedirc for notes and spell checks on the doc, to Daniel for
additional info about IPC and User namespaces interaction and to Randy, who
alluded me to using a spell checker before sending the documentation :)
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Daniel Lezcano <dlezcano@fr.ibm.com>
Cc: Theodore Tso <tytso@mit.edu>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 7d69a1f4 ("remove CONFIG_UTS_NS
and CONFIG_IPC_NS") by Cedric Le Goater accidentally removed the code
that prevented the uts->hostname and uts->domainname values from being
overwritten from another namespace.

In other words, setting hostname/domainname via sysfs (echo xxx >
/proc/sys/kernel/(host|domain)name) cased the new value to be set in
init UTS namespace only.

Return the isolation back.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Acked-by: NCedric Le Goater <clg@fr.ibm.com>
Acked-by: NSerge Hallyn <serue@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Remove errnoeous x character from dev_dbg() call that stops the driver
compiling under debug.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

There should be a pci_dev_put when breaking out of a loop that iterates
over calls to pci_get_device and similar functions.

This was fixed using the following semantic patch.

// <smpl>
@@
identifier d;
type T;
expression e;
iterator for_each_pci_dev;
@@

T *d;
...
for_each_pci_dev(d)
   {... when != pci_dev_put(d)
        when != e = d
(
    return d;
|
+  pci_dev_put(d);
?  return ...;
)
...}
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Cc: Greg KH <greg@kroah.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The code in fb_ddc_read() is said to be based on the implementation of the
radeon driver:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=fc5891c8a3ba284f13994d7bc1f1bfa8283982de

However, comparing the old radeon driver code with the new fb_ddc code
reveals some differences.  Most notably, the I2C bus lines are held at the
end of the function, while the original code was releasing them (as the
comment above correctly says.)

There are a few other differences, which appear to be responsible for read
failures on my system.  While tracing low-level I2C code in i2c-algo-bit, I
noticed that the initial attempt to read the EDID always failed.  It takes
one retry for the read to succeed.  As we are about to remove this
automatic retry property from i2c-algo-bit, reading the EDID would really
fail.

As a summary, the I2C lines quirk which is supposedly needed to read EDID
on some older monitors is currently breaking the (first) read on all other
monitors (and might not even work with older ones - did anyone try since
October 2006?)

After applying the patch below, which makes the code in fb_ddc_read()
really similar to what the radeon driver used to have, the first EDID read
succeeds again.

On top of that, as it appears that this code has been broken for one year
now and nobody seems to have complained, I'm curious if it makes sense to
keep this quirk in place.  It makes the code more complex and slower just
for the sake of monitors which I guess nobody uses anymore.  Can't we just
get rid of it?
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: NRoger Leigh <rleigh@whinlatter.ukfsn.org>
Tested-by: NMichael Buesch <mb@bu3sch.de>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

m68k: zorro7xx needs <asm/amigahw.h> if !CONFIG_AMIGA_PCMCIA

Reported by Ingo Juergensmann <ij@2007.bluespice.org>
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>