Ugly #include dependencies. We need to have local_softirq_pending()
defined before it gets used in <linux/interrupt.h>. But <asm/hardirq.h>
provides the definition *after* this #include chain:
  <linux/irq.h>
    <asm/irq.h>
      <asm/hw_irq.h>
        <linux/interrupt.h>
Signed-off-by: NTony Luck <tony.luck@intel.com>
[ cherry-picked from the ia64 tree to fix "2bf2160d: irq: Add tracepoint to softirq_raise" ]
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Just a minor cleanup patch that makes things easier to the following patches.
No functionality change in this patch.
Signed-off-by: NVenkatesh Pallipadi <venki@google.com>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1286237003-12406-3-git-send-email-venki@google.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NIngo Molnar <mingo@elte.hu>
Acked-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NIngo Molnar <mingo@elte.hu>
Acked-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Russell King <linux@arm.linux.org.uk>

We don't need a complex IOMMU dependency list on IA64 so
we just define the IOMMU_* macro which is used the DMAR driver, as a dummy.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
LKML-Reference: <1286564028-2352-2-git-send-email-konrad.wilk@oracle.com>
Reported-by: NTony Luck <tony.luck@intel.com>
Tested-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>

This is called before early_irq_init() which will clobber any
registrations made too early.  Move the calls to ia64_mca_late_init().
Signed-off-by: NTony Luck <tomy.luck@intel.com>

Thomas Gleixner is cleaning up the generic irq code, and ia64 ran
into problems because it calls register_intr() before early_irq_init()
is called.  Move the call to acpi_boot_init() from setup_arch() to
init_IRQ().

As a bonus - moving the call later means we no longer need the
hacks in iosapic.c to switch between the bootmem and regular
allocator - we can just used kzalloc() for allocation.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Thomas Gleixner <tglx@linutronix.de> wrote:
>__do_IRQ() has been deprecated after a two years migration phase in
>commit 0e57aa11. Since then another 18 months have gone by ...

Mostly trivial stuff for this. The only tricky part was realizing
that the new handler_*_irq() paths do not use desc->chip->end(irq).
Not a problem for the edge case as the ia64 iosapic routine for
that was nop(). But the "level" case handled interrupt migration
there.  Just use a slightly modified version of the "end" routine
as "unmask" for the level triggered case.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

By moving the iounmap up above the test, it takes place whether the test
succeeds or fails.
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Get rid of init_MUTEX[_LOCKED]() and use sema_init() instead.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Replace sizeof(xen_branch_target) / sizeof(xen_branch_target[0]) with
ARRAY_SIZE(xen_branch_target) in arch/ia64/xen/xen_pv_ops.c
Signed-off-by: NNikitas Angelinas <nikitasangelinas@gmail.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Missed this file in commit 32974ad4
   [IA64] Remove COMPAT_IA32 support

It is no longer needed, so remove it.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Several Linux features are dependent on stack trace support. Add
it so they can be enabled.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Ugly #include dependencies. We need to have local_softirq_pending()
defined before it gets used in <linux/interrupt.h>. But <asm/hardirq.h>
provides the definition *after* this #include chain:
  <linux/irq.h>
    <asm/irq.h>
      <asm/hw_irq.h>
        <linux/interrupt.h>
Signed-off-by: NTony Luck <tony.luck@intel.com>

We don't need a comlex IOMMU dependency list on IA64 so
we just define the IOMMU_* macro as a dummy.
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Tony's fix (f574c843) has a small bug,
it incorrectly uses "r3" as a scratch register in the first of the two
unlock paths ... it is also inefficient.  Optimize the fast path again.
Signed-off-by: NPetr Tesarik <ptesarik@suse.cz>
Signed-off-by: NTony Luck <tony.luck@intel.com>

compat_alloc_user_space() expects the caller to independently call
access_ok() to verify the returned area.  A missing call could
introduce problems on some architectures.

This patch incorporates the access_ok() check into
compat_alloc_user_space() and also adds a sanity check on the length.
The existing compat_alloc_user_space() implementations are renamed
arch_compat_alloc_user_space() and are used as part of the
implementation of the new global function.

This patch assumes NULL will cause __get_user()/__put_user() to either
fail or access userspace on all architectures.  This should be
followed by checking the return value of compat_access_user_space()
for NULL in the callers, at which time the access_ok() in the callers
can also be removed.
Reported-by: NBen Hawkes <hawkes@sota.gen.nz>
Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NChris Metcalf <cmetcalf@tilera.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Acked-by: NIngo Molnar <mingo@elte.hu>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NTony Luck <tony.luck@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: James Bottomley <jejb@parisc-linux.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: <stable@kernel.org>

It's clear from the comment in the code about keeping the
kernel's unwind table at the front of the list that some
attention has been paid to access patterns. Tests on other
architectures have shown that a move-to-front optimisation
improves searches dramatically.
Signed-off-by: NPhil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

The expression in the comment was mis-bracketted.
There was also no need to introduce a coding-style breaking
macro for a single use, so just made it a static const.
Signed-off-by: NPhil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

When ia64 converted to using ticket locks, an inline implementation
of trylock/unlock in fsys.S was missed.  This was not noticed because
in most circumstances it simply resulted in using the slow path because
the siglock was apparently not available (under old spinlock rules).

Problems occur when the ticket spinlock has value 0x0 (when first
initialised, or when it wraps around). At this point the fsys.S
code acquires the lock (changing the 0x0 to 0x1. If another process
attempts to get the lock at this point, it will change the value from
0x1 to 0x2 (using new ticket lock rules). Then the fsys.S code will
free the lock using old spinlock rules by writing 0x0 to it. From
here a variety of bad things can happen.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Sysrq operations do not accept tty argument anymore so no need to pass
it to us.

[Stephen Rothwell <sfr@canb.auug.org.au>: fix build breakage in drm code
 caused by sysrq using bool but not including linux/types.h]

[Sachin Sant <sachinp@in.ibm.com>: fix build breakage in s390 keyboadr
 driver]
Acked-by: NAlan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: NJason Wessel <jason.wessel@windriver.com>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

arch/ia64/kernel/process.c:636: error: conflicting types for ‘sys_execve’

commit d7627467
Make do_execve() take a const filename pointer

Missed the declaration of sys_execve in the ia64 asm/unistd.h (perhaps
because there is no reason for it to be there ... it might be a left over
from the COMPAT code?). Just delete the conflicting version.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Make do_execve() take a const filename pointer so that kernel_execve() compiles
correctly on ARM:

arch/arm/kernel/sys_arm.c:88: warning: passing argument 1 of 'do_execve' discards qualifiers from pointer target type

This also requires the argv and envp arguments to be consted twice, once for
the pointer array and once for the strings the array points to.  This is
because do_execve() passes a pointer to the filename (now const) to
copy_strings_kernel().  A simpler alternative would be to cast the filename
pointer in do_execve() when it's passed to copy_strings_kernel().

do_execve() may not change any of the strings it is passed as part of the argv
or envp lists as they are some of them in .rodata, so marking these strings as
const should be fine.

Further kernel_execve() and sys_execve() need to be changed to match.

This has been test built on x86_64, frv, arm and mips.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Tested-by: NRalf Baechle <ralf@linux-mips.org>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Use the defconfig files generated by "make savedefconfig" for
remaining defconfig files.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

unifdef-y and header-y have same semantic, so drop unifdef-y
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Three new syscalls for 2.6.36: prlimit64, fanotify_init and
fanotify_mark.  Wire up the ia64 syscall table for them.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Mark arguments to certain system calls as being const where they should be but
aren't.  The list includes:

 (*) The filename arguments of various stat syscalls, execve(), various utimes
     syscalls and some mount syscalls.

 (*) The filename arguments of some syscall helpers relating to the above.

 (*) The buffer argument of various write syscalls.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

These have been broken (returning "int") since the dawn of
time. But there were no users that needed the whole value
until commit
 424acaae
 rwsem: wake queued readers when writer blocks on active read lock

made this change:

-           (rwsem_atomic_update(0, sem) & RWSEM_ACTIVE_MASK))
-               /* Someone grabbed the sem already */
+           rwsem_atomic_update(0, sem) < RWSEM_WAITING_BIAS)
+               /* Someone grabbed the sem for write already */

RWSEM_ACTIVE_MASK is 0xffffffffL, so the old code only looked
at the low order 32-bits. The new code needs to see all 64 bits.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Some nice improvements were made to rwsem in commit:

 424acaae
 rwsem: wake queued readers when writer blocks on active read lock

but this change overlooked that ia64 had defined RWSEM_WAITING_BIAS
as an unsigned value, while the new code required a signed value (as
it is in every other architecture).

This fix suggested by the original patch author: Michel Lespinasse.
Signed-off-by: NTony Luck <tony.luck@intel.com>

Architectures implement dma_is_consistent() in different ways (some
misinterpret the definition of API in DMA-API.txt).  So it hasn't been so
useful for drivers.  We have only one user of the API in tree.  Unlikely
out-of-tree drivers use the API.

Even if we fix dma_is_consistent() in some architectures, it doesn't look
useful at all.  It was invented long ago for some old systems that can't
allocate coherent memory at all.  It's better to export only APIs that are
definitely necessary for drivers.

Let's remove this API.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

dma_get_cache_alignment returns the minimum DMA alignment.  Architectures
defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN).  So we
can unify dma_get_cache_alignment implementations.

Note that some architectures implement dma_get_cache_alignment wrongly.
dma_get_cache_alignment() should return the minimum DMA alignment.  So
fully-coherent architectures should return 1.  This patch also fixes this
issue.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Switch ia64/perfmon to using the d_dname() instead of relying on
__d_path() to prepend the name of the root dentry to the path.

CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

This patch is against the 2.6.34 source.

Paraphrased from the 1989 BSD patch by David Borman @ cray.com:

     These are the changes needed for the kernel to support
     LINEMODE in the server.

     There is a new bit in the termios local flag word, EXTPROC.
     When this bit is set, several aspects of the terminal driver
     are disabled.  Input line editing, character echo, and mapping
     of signals are all disabled.  This allows the telnetd to turn
     off these functions when in linemode, but still keep track of
     what state the user wants the terminal to be in.

     New ioctl:
         TIOCSIG         Generate a signal to processes in the
                         current process group of the pty.

     There is a new mode for packet driver, the TIOCPKT_IOCTL bit.
     When packet mode is turned on in the pty, and the EXTPROC bit
     is set, then whenever the state of the pty is changed, the
     next read on the master side of the pty will have the TIOCPKT_IOCTL
     bit set.  This allows the process on the server side of the pty
     to know when the state of the terminal has changed; it can then
     issue the appropriate ioctl to retrieve the new state.

Since the original BSD patches accompanied the source code for telnet
I've left that reference here, but obviously the feature is useful for
any remote terminal protocol, including ssh.

The corresponding feature has existed in the BSD tty driver since 1989.
For historical reference, a good copy of the relevant files can be found
here:

http://anonsvn.mit.edu/viewvc/krb5/trunk/src/appl/telnet/?pathrev=17741Signed-off-by: NHoward Chu <hyc@symas.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

As Jeff Dike pointed out, the Hayes ESP driver was removed in commit
f53a2ade, so these ioctl definitions
should also be removed.  This cleans up the remaining arch-specific
locations of this ioctl value.

Thanks to Arnd for pointing these out.

Cc: Jeff Dike <jdike@addtoit.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Workqueues are now initialized as part of the early_initcall().  So they
are available for use during cold boot process aswell.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Define stubs for the numa_*_id() generic percpu related functions for
non-NUMA configurations in <asm-generic/topology.h> where the other
non-numa stubs live.

Fixes ia64 !NUMA build breakage -- e.g., tiger_defconfig

Back out now unneeded '#ifndef CONFIG_NUMA' guards from ia64 smpboot.c
Signed-off-by: NLee Schermerhorn <lee.schermerhorn@hp.com>
Tested-by: NTony Luck <tony.luck@intel.com>
Acked-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Architectures don't need to define ISA_DMA_THRESHOLD anymore.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: NJames Bottomley <James.Bottomley@suse.de>
Acked-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NJens Axboe <jaxboe@fusionio.com>