platform_device_register_simple() returns error code as pointer when it
fails.  The return value should be checked by IS_ERR().

Cc: Abhay Salunke <abhay_salunke@dell.com>
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Change Documentation/filesystems/udf.txt from saying that read/write mounts
on cd media are not supported to instead state the current level of
support.  Specifically that it works fine on dvd+rw media and can be made
to work on cd-rw media via the pktcdvd device.

Cc: Peter Osterlund <petero2@telia.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

http://kernelfun.blogspot.com/2006/11/mokb-14-11-2006-linux-26x-selinux.html

mount that image...
fs: filesystem was not cleanly unmounted, running fsck.hfs is recommended.  mounting read-only.
hfs: get root inode failed.
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000018
 printing eip
...
EIP is at superblock_doinit+0x21/0x767
...
 [] selinux_sb_kern_mount+0xc/0x4b
 [] vfs_kern_mount+0x99/0xf6
 [] do_kern_mount+0x2d/0x3e
 [] do_mount+0x5fa/0x66d
 [] sys_mount+0x77/0xae
 [] syscall_call+0x7/0xb
DWARF2 unwinder stuck at syscall_call+0x7/0xb

hfs_fill_super() returns success even if
  root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
or
  sb->s_root = d_alloc_root(root_inode);

fails.  This superblock finds its way to superblock_doinit() which does:

        struct dentry *root = sb->s_root;
        struct inode *inode = root->d_inode;

and boom.  Need to make sure the error cases return an error, I think.

[akpm@osdl.org: return -ENOMEM on oom]
Signed-off-by: NEric Sandeen <sandeen@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix compilation failure.
Signed-off-by: NArnaud Giersch <arnaud.giersch@free.fr>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The PCI Express and Hypertransport chip-specific source files should only
be built when the kernel has the capability of actually compiling them.

This fixes the driver build on, for example, ia64.
Signed-off-by: NBryan O'Sullivan <bryan.osullivan@qlogic.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Finally add the third PowerBook Wallstreet 233MHz model to the list of
known display resolutions.

Without this change, a 640x480 video mode is used.  A workaround so far was
to boot with 'video=atyfb:vmode:14'
Signed-off-by: NOlaf Hering <olaf@aepfle.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Solomon Peachy <pizza@shaftnet.org>
Cc: James Simmons <jsimmons@infradead.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

On rename, for both the old and new lower dentry objects, eCryptfs is
missing a dput on the lower parent directory dentry.  This patch will
prevent the BUG() at fs/dcache.c:613 from being hit after renaming a file
inside eCryptfs and then doing a umount on the lower filesystem.
Signed-off-by: NMichael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix possible NULL dereference in pnxrgbfb.
Signed-off-by: NVitaly Wool <vwool@ru.mvista.com>
Cc: James Simmons <jsimmons@infradead.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Make the drivers' names less generic to avoid possible confusion in future,
as was requested by Russell King.
Signed-off-by: NVitaly Wool <vwool@ru.mvista.com>
Acked-by: NJames Simmons <jsimmons@infradead.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

I got an oops when booting 2.6.19-rc5-mm1 on my ia64 machine.

Below is the log.

Oops 11012296146944 [1]
Modules linked in: binfmt_misc dm_mirror dm_multipath dm_mod thermal processor f
an container button sg eepro100 e100 mii

Pid: 0, CPU 0, comm:              swapper
psr : 0000121008022038 ifs : 800000000000040b ip  : [<a0000001000e1411>]    Not
tainted
ip is at __do_IRQ+0x371/0x3e0
unat: 0000000000000000 pfs : 000000000000040b rsc : 0000000000000003
rnat: 656960155aa56aa5 bsps: a00000010058b890 pr  : 656960155aa55a65
ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c0270033f
csd : 0000000000000000 ssd : 0000000000000000
b0  : a0000001000e1390 b6  : a0000001005beac0 b7  : e00000007f01aa00
f6  : 000000000000000000000 f7  : 0ffe69090000000000000
f8  : 1000a9090000000000000 f9  : 0ffff8000000000000000
f10 : 1000a908ffffff6f70000 f11 : 1003e0000000000000909
r1  : a000000100fbbff0 r2  : 0000000000010002 r3  : 0000000000010001
r8  : fffffffffffbffff r9  : a000000100bd8060 r10 : a000000100dd83b8
r11 : fffffffffffeffff r12 : a000000100bcbbb0 r13 : a000000100bc4000
r14 : 0000000000010000 r15 : 0000000000010000 r16 : a000000100c01aa8
r17 : a000000100d2c350 r18 : 0000000000000000 r19 : a000000100d2c300
r20 : a000000100c01a88 r21 : 0000000080010100 r22 : a000000100c01ac0
r23 : a0000001000108e0 r24 : e000000477980004 r25 : 0000000000000000
r26 : 0000000000000000 r27 : e00000000913400c r28 : e0000004799ee51c
r29 : e0000004778b87f0 r30 : a000000100d2c300 r31 : a00000010005c7e0

Call Trace:
 [<a000000100014600>] show_stack+0x40/0xa0
                                sp=a000000100bcb760 bsp=a000000100bc4f40
 [<a000000100014f00>] show_regs+0x840/0x880
                                sp=a000000100bcb930 bsp=a000000100bc4ee8
 [<a000000100037fb0>] die+0x250/0x320
                                sp=a000000100bcb930 bsp=a000000100bc4ea0
 [<a00000010005e5f0>] ia64_do_page_fault+0x8d0/0xa20
                                sp=a000000100bcb950 bsp=a000000100bc4e50
 [<a00000010000caa0>] ia64_leave_kernel+0x0/0x290
                                sp=a000000100bcb9e0 bsp=a000000100bc4e50
 [<a0000001000e1410>] __do_IRQ+0x370/0x3e0
                                sp=a000000100bcbbb0 bsp=a000000100bc4df0
 [<a000000100011f50>] ia64_handle_irq+0x170/0x220
                                sp=a000000100bcbbb0 bsp=a000000100bc4dc0
 [<a00000010000caa0>] ia64_leave_kernel+0x0/0x290
                                sp=a000000100bcbbb0 bsp=a000000100bc4dc0
 [<a000000100012390>] ia64_pal_call_static+0x90/0xc0
                                sp=a000000100bcbd80 bsp=a000000100bc4d78
 [<a000000100015630>] default_idle+0x90/0x160
                                sp=a000000100bcbd80 bsp=a000000100bc4d58
 [<a000000100014290>] cpu_idle+0x1f0/0x440
                                sp=a000000100bcbe20 bsp=a000000100bc4d18
 [<a000000100009980>] rest_init+0xc0/0xe0
                                sp=a000000100bcbe20 bsp=a000000100bc4d00
 [<a0000001009f8ea0>] start_kernel+0x6a0/0x6c0
                                sp=a000000100bcbe20 bsp=a000000100bc4ca0
 [<a0000001000089f0>] __end_ivt_text+0x6d0/0x6f0
                                sp=a000000100bcbe30 bsp=a000000100bc4c00
 <0>Kernel panic - not syncing: Aiee, killing interrupt handler!

The root cause is that some irq_chip variables, especially ia64_msi_chip,
initiate their memeber end to point to NULL. __do_IRQ doesn't check
if irq_chip->end is null and just calls it after processing the interrupt.

As irq_chip->end is called at many places, so I fix it by reinitiating
irq_chip->end to dummy_irq_chip.end, e.g., a noop function.
Signed-off-by: NZhang Yanmin <yanmin.zhang@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

[PATCH] ipmi: use platform_device_add() instead of platform_device_register() to register device allocated dynamically

I got below warning when running 2.6.19-rc5-mm1 on my ia64 machine.

WARNING at lib/kobject.c:172 kobject_init()

Call Trace:
 [<a0000001000137c0>] show_stack+0x40/0xa0
                                sp=e0000002ff9f7bc0 bsp=e0000002ff9f0d10
 [<a000000100013850>] dump_stack+0x30/0x60
                                sp=e0000002ff9f7d90 bsp=e0000002ff9f0cf8
 [<a000000100407bb0>] kobject_init+0x90/0x160
                                sp=e0000002ff9f7d90 bsp=e0000002ff9f0cd0
 [<a0000001005ae080>] device_initialize+0x40/0x1c0
                                sp=e0000002ff9f7da0 bsp=e0000002ff9f0cb0
 [<a0000001005b88c0>] platform_device_register+0x20/0x60
                                sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c90
 [<a000000100592560>] try_smi_init+0xbc0/0x11e0
                                sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c50
 [<a000000100594900>] init_ipmi_si+0xaa0/0x12e0
                                sp=e0000002ff9f7de0 bsp=e0000002ff9f0bd8
 [<a000000100009910>] init+0x350/0x780
                                sp=e0000002ff9f7e00 bsp=e0000002ff9f0ba8
 [<a000000100011d30>] kernel_thread_helper+0x30/0x60
                                sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80
 [<a0000001000090c0>] start_kernel_thread+0x20/0x40
                                sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80
WARNING at lib/kobject.c:172 kobject_init()

Call Trace:
 [<a0000001000137c0>] show_stack+0x40/0xa0
                                sp=e0000002ff9f7b40 bsp=e0000002ff9f0db0
 [<a000000100013850>] dump_stack+0x30/0x60
                                sp=e0000002ff9f7d10 bsp=e0000002ff9f0d98
 [<a000000100407bb0>] kobject_init+0x90/0x160
                                sp=e0000002ff9f7d10 bsp=e0000002ff9f0d70
 [<a0000001005ae080>] device_initialize+0x40/0x1c0
                                sp=e0000002ff9f7d20 bsp=e0000002ff9f0d50
 [<a0000001005b88c0>] platform_device_register+0x20/0x60
                                sp=e0000002ff9f7d50 bsp=e0000002ff9f0d30
 [<a00000010058ac00>] ipmi_register_smi+0xcc0/0x18e0
                                sp=e0000002ff9f7d50 bsp=e0000002ff9f0c90
 [<a000000100592600>] try_smi_init+0xc60/0x11e0
                                sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c50
 [<a000000100594900>] init_ipmi_si+0xaa0/0x12e0
                                sp=e0000002ff9f7de0 bsp=e0000002ff9f0bd8
 [<a000000100009910>] init+0x350/0x780
                                sp=e0000002ff9f7e00 bsp=e0000002ff9f0ba8
 [<a000000100011d30>] kernel_thread_helper+0x30/0x60
                                sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80
 [<a0000001000090c0>] start_kernel_thread+0x20/0x40
                                sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80

The root cause is the device struct is initialized twice.

If the device is allocated dynamically by platform_device_alloc,
platform_device_alloc will initialize struct device, then,
platform_device_add should be used to register the device.

The difference between platform_device_register and platform_device_add is
platform_device_register will initiate the device while platform_device_add
won't.
Signed-off-by: NZhang Yanmin <yanmin.zhang@intel.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Getting there.  Hopefully the MSI and other interrupt problems are all
solved now.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The windfarm code, in it's current incarnation, uses request_module() to
load the various submodules it needs for a given platform so that only
the main platform control module needs to be modprobed. However, it was
missing various bits. This fixes it. In the future, we'll use some
hotplug mecanisms to try to get all of this auto-loaded on the platforms
where it matters but that isn't ready yet.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

All the infrastructure is already in place for this, so we only need
to allocate a syscall number and hook it up.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This adds the /sys/devices/system/cpu/*/topology/thread_siblings
files on powerpc.  These files are already available on other
architectures.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Komuro reports that ISA interrupts do not work after a disable_irq(),
causing some PCMCIA drivers to not work, with messages like

	eth0: Asix AX88190: io 0x300, irq 3, hw_addr xx:xx:xx:xx:xx:xx
	eth0: found link beat
	eth0: autonegotiation complete: 100baseT-FD selected
	eth0: interrupt(s) dropped!
	eth0: interrupt(s) dropped!
	eth0: interrupt(s) dropped!
	...

Linus Torvalds <torvalds@osdl.org> said:

  "Now, edge-triggered interrupts are a _lot_ harder to mask, because the
   Intel APIC is an unbelievable piece of sh*t, and has the edge-detect logic
   _before_ the mask logic, so if a edge happens _while_ the device is
   masked, you'll never ever see the edge ever again (unmasking will not
   cause a new edge, so you simply lost the interrupt).

   So when you "mask" an edge-triggered IRQ, you can't really mask it at all,
   because if you did that, you'd lose it forever if the IRQ comes in while
   you masked it. Instead, we're supposed to leave it active, and set a flag,
   and IF the IRQ comes in, we just remember it, and mask it at that point
   instead, and then on unmasking, we have to replay it by sending a
   self-IPI."

This trivial patch solves the problem.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@redhat.com>
Acked-by: NKomuro <komurojun-mbn@nifty.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Disable MSI support on HD-audio driver as default since there are too
many broken devices.

The module option is changed from disable_msi to enable_msi, too.  For
turning MSI support on, pass enable_msi=1, instead.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

port is dereferenced even if it is NULL.  Dereference it _after_ the
check if (!port)...  Thanks Eric <ef87@yahoo.com> for reporting this.

This fixes

	http://bugzilla.kernel.org/show_bug.cgi?id=7527Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6:
  [PATCH] x86-64: Fix race in exit_idle
  [PATCH] x86-64: Fix vgetcpu when CONFIG_HOTPLUG_CPU is disabled
  [PATCH] x86: Add acpi_user_timer_override option for Asus boards
  [PATCH] x86-64: setup saved_max_pfn correctly (kdump)
  [PATCH] x86-64: Handle reserve_bootmem_generic beyond end_pfn
  [PATCH] x86-64: shorten the x86_64 boot setup GDT to what the comment says
  [PATCH] x86-64: Fix PTRACE_[SG]ET_THREAD_AREA regression with ia32 emulation.
  [PATCH] x86-64: Fix partial page check to ensure unusable memory is not being marked usable.
  Revert "[PATCH] MMCONFIG and new Intel motherboards"

This reverts commit 0130b0b3.

Sergey Vlasov points out (and Vadim Lobanov concurs) that the bug it was
supposed to fix must be some unrelated memory corruption, and the "fix"
actually causes more problems:

  "However, the new code does not look safe in all cases.  If some other
   task has opened more files while dup_fd() released oldf->file_lock, the
   new code will update open_files to the new larger value.  But newf was
   allocated with the old smaller value of open_files, therefore subsequent
   accesses to newf may try to write into unallocated memory."

so revert it.

Cc: Sharyathi Nagesh <sharyath@in.ibm.com>
Cc: Sergey Vlasov <vsu@altlinux.ru>
Cc: Vadim Lobanov <vlobanov@speakeasy.net>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: fix double-completion on error
  [PATCH] pata_artop: fix "& (1 >>" typo
  [PATCH] hpt37x: Check the enablebits

Commit cb07c9a1 causes the wrong return
value.  is_hugepage_only_range() is a boolean, so we should return
-EINVAL rather than 1.

Also - we can use "mm" instead of looking up "current->mm" again.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

cpqarray needs to call disk_stat_add() for iostat to work.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

cciss needs to call disk_stat_add() for iostat to work.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

When building a monolithic kernel, the load order of drivers does not
work for SAS libata users, resulting in a kernel oops.

Convert libata to use subsys_initcall instead of module_init, which
ensures that libata gets loaded before any LLDD.

This is the same thing that scsi core does to solve the problem.  The
load order problem was observed on ipr SAS adapters and should exist for
other SAS users as well.
Signed-off-by: NBrian King <brking@us.ibm.com>
Acked-by: NJeff Garzik <jgarzik@pobox.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Unlike mmap(), the codepath for brk() creates a vma without first checking
that it doesn't touch a region exclusively reserved for hugepages.  On
powerpc, this can allow it to create a normal page vma in a hugepage
region, causing oopses and other badness.

Add a test to prevent this.  With this patch, brk() will simply fail if it
attempts to move the break into a hugepage reserved region.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

(David:)

If hugetlbfs_file_mmap() returns a failure to do_mmap_pgoff() - for example,
because the given file offset is not hugepage aligned - then do_mmap_pgoff
will go to the unmap_and_free_vma backout path.

But at this stage the vma hasn't been marked as hugepage, and the backout path
will call unmap_region() on it.  That will eventually call down to the
non-hugepage version of unmap_page_range().  On ppc64, at least, that will
cause serious problems if there are any existing hugepage pagetable entries in
the vicinity - for example if there are any other hugepage mappings under the
same PUD.  unmap_page_range() will trigger a bad_pud() on the hugepage pud
entries.  I suspect this will also cause bad problems on ia64, though I don't
have a machine to test it on.

(Hugh:)

prepare_hugepage_range() should check file offset alignment when it checks
virtual address and length, to stop MAP_FIXED with a bad huge offset from
unmapping before it fails further down.  PowerPC should apply the same
prepare_hugepage_range alignment checks as ia64 and all the others do.

Then none of the alignment checks in hugetlbfs_file_mmap are required (nor
is the check for too small a mapping); but even so, move up setting of
VM_HUGETLB and add a comment to warn of what David Gibson discovered - if
hugetlbfs_file_mmap fails before setting it, do_mmap_pgoff's unmap_region
when unwinding from error will go the non-huge way, which may cause bad
behaviour on architectures (powerpc and ia64) which segregate their huge
mappings into a separate region of the address space.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: NAdam Litke <agl@us.ibm.com>
Acked-by: NDavid Gibson <david@gibson.dropbear.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Looks like I still take care of the USB gadget/peripheral framework.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Acked-by: NGreg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix binary/logical operator typo which leads to unreachable code.  Noticed
while looking at other issues; I don't have the relevant hardware to test
this.
Signed-off-by: NNathan Lynch <ntl@pobox.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: NJames Simmons <jsimmons@infradead.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Resolve the panic on failed mount of an autofs filesystem originally
reported by Mao Bibo.

It addresses two issues that happen after the mount fail.  The first a NULL
pointer reference to a field (pipe) in the autofs superblock info structure
and second the lack of super block cleanup by the autofs and autofs4
modules.
Signed-off-by: NIan Kent <raven@themaw.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Stray bracket in debug code.
Signed-off-by: NNicolas Kaiser <nikai@nikai.net>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix http://bugzilla.kernel.org/show_bug.cgi?id=7264

We need to target this quirk a little more tightly, using the T20 DMI string.

Cc: Pavel Kysilka <goldenfish@bsys.cz>
Acked-by: NKristen Carlson Accardi <kristen.c.accardi@intel.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix interrupt routing for via 586 bridges.  pirq can be 5 which needs to be
mapped to INTD.  But currently the access functions can handle only pirq
1-4.  this is similar to the other via chipsets where pirq 4 and 5 are both
mapped to INTD.  Fixes bugzilla #7490

Cc: Daniel Paschka <monkey20181@gmx.net>
Cc: Adrian Bunk <bunk@susta.de>
Signed-off-by: NDaniel Ritz <daniel.ritz@gmx.ch>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

When we get a mismatch between handlers on the same IRQ, all we get is "IRQ
handler type mismatch for IRQ n".  Let's print the name of the
presently-registered handler with which we got the mismatch.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

When another interrupt happens in exit_idle the exit idle notifier
could be called an incorrect number of times.

Add a test_and_clear_bit_pda and use it handle the bit
atomically against interrupts to avoid this.

Pointed out by Stephane Eranian
Signed-off-by: NAndi Kleen <ak@suse.de>

The vgetcpu per CPU initialization previously relied on CPU hotplug
events for all CPUs to initialize the per CPU state. That only
worked only on kernels with CONFIG_HOTPLUG_CPU enabled.  On the
others some CPUs didn't get their state initialized properly
and vgetcpu wouldn't work.

Change the initialization sequence to instead run in a normal
initcall (which runs after the normal CPU bootup) and initialize
all running CPUs there. Later hotplug CPUs are still handled
with an hotplug notifier.

This actually simplifies the code somewhat.
Signed-off-by: NAndi Kleen <ak@suse.de>

Timer overrides are normally disabled on Nvidia board because
they are commonly wrong, except on new ones with HPET support.
Unfortunately there are quite some Asus boards around that
don't have HPET, but need a timer override.

We don't know yet how to handle this transparently,
but at least add a command line option to force the timer override
and let them boot.

Cc: len.brown@intel.com
Signed-off-by: NAndi Kleen <ak@suse.de>

x86_64: setup saved_max_pfn correctly

2.6.19-rc4 has broken CONFIG_CRASH_DUMP support on x86_64. It is impossible
to read out the kernel contents from /proc/vmcore because saved_max_pfn is set
to zero instead of the max_pfn value before the user map is setup.

This happens because saved_max_pfn is initialized at parse_early_param() time,
and at this time no active regions have been registered. save_max_pfn is setup
from e820_end_of_ram(), more exact find_max_pfn_with_active_regions() which
returns 0 because no regions exist.

This patch fixes this by registering before and removing after the call
to e820_end_of_ram().
Signed-off-by: NMagnus Damm <magnus@valinux.co.jp>
Signed-off-by: NAndi Kleen <ak@suse.de>

This can happen on kexec kernels with some configurations, in particularly
on Unisys ES7000 systems.

Analysis by Amul Shah

Cc: Amul Shah <amul.shah@unisys.com>
Signed-off-by: NAndi Kleen <ak@suse.de>

Stephen Tweedie, Herbert Xu, and myself have been struggling with a very
nasty bug in Xen.  But it also pointed out a small bug in the x86_64
kernel boot setup.

The GDT limit being setup by the initial bzImage code when entering into
protected mode is way too big.  The comment by the code states that the
size of the GDT is 2048, but the actual size being set up is much bigger
(32768). This happens simply because of one extra '0'.

Instead of setting up a 0x800 size, 0x8000 is set up.  On bare metal this
is fine because the CPU wont load any segments unless  they are
explicitly used.  But unfortunately, this breaks Xen on vmx FV, since it
(for now) blindly loads all the segments into the VMCS if they are less
than the gdt limit. Since the real mode segments are around 0x3000, we are
getting junk into the VMCS and that later causes an exception.

Stephen Tweedie has written up a patch to fix the Xen side and will be
submitting that to those folks. But that doesn't excuse the GDT limit
being a magnitude too big.

AK: changed to compute true gdt size in assembler, fixed comment
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NAndi Kleen <ak@suse.de>