When the kernel is working well and we want to restart cleanly
kernel_restart is the function to use.   But in many instances
the kernel wants to reboot when thing are expected to be working
very badly such as from panic or a software watchdog handler.

This patch adds the function emergency_restart() so that
callers can be clear what semantics they expect when calling
restart.  emergency_restart() is expected to be callable
from interrupt context and possibly reliable in even more
trying circumstances.

This is an initial generic implementation for all architectures.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

It is obvious we wanted to call kernel_restart here
but since we don't have it the code was expanded inline and hasn't
been correct since sometime in 2.4.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Because the factors of sys_reboot don't exist people calling
into the reboot path duplicate the code badly, leading to
inconsistent expectations of code in the reboot path.

This patch should is just code motion.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

In the recent addition of device_suspend calls into
sys_reboot two code paths were missed.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

*** Warning: "fc_remote_port_block" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!
*** Warning: "scsi_is_fc_rport" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!
*** Warning: "fc_remote_port_unblock" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!
*** Warning: "fc_remote_port_rolechg" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!
*** Warning: "fc_release_transport" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!
*** Warning: "fc_remove_host" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!
*** Warning: "fc_remote_port_add" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!
*** Warning: "fc_attach_transport" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!

Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Older gcc's dont support anonymous unions, so this driver gets hundreds of
error.

Fortunately the fix is easy...

Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Cc: Robert Love <rml@novell.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add inotify syscall entries to x86-64.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add missing fsnotify_open() hook to sys32_open().

Add fsnotify_open() hook to sys32_open() on x86-64.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Check for (unlikely) errors in the filesystem initialization stuff in
our module_init() function.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Change default inotify limits: Maximum instances per user to 128 and
maximum events per queue to 16k.  The max instances used to be 128; the
change to 8 was a mistake.  Memory consumption is fine.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Handle error out paths better.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Bug fix: Ensure that the fd passed to inotify_add_watch() and
inotify_rm_watch() belongs to inotify.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

As an optimization, use fget_light() and fput_light() where possible.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Miscellaneous invariant clean up, comment fixes, and so on.  Trivial
stuff.
Signed-off-by: NRobert Love <rml@novell.com>
Signed-off-by: NJohn McCutchan <ttb@tentacle.dhs.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NPatrick McHardy <kaber@trash.net>
Acked-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

These two bits were accesses non-atomically from assembler
code.  So, in order to eliminate any potential races resulting
from that, move these pieces of state into two bytes elsewhere
in struct thread_info.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It is only used by some localized code in irq.c, and also
delete enable_prom_timer() as that is totally unused.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

rwsem_atomic_update and rwsem_atomic_add can be implemented
straightly using atomic_*() routines.

Also, rwsem_cmpxchgw() is totally unused, kill it.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Noticed this while comparing sparc64's bitops.h to ppc64's.
We can cast the volatile memory argument to be non-volatile.

While we're here, __inline__ --> inline.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It needs to happen before any header includes because nowadays
some things implicitly include asm/unistd.h which ends up being
before the __KERNEL_SYSCALLS__ define gets done.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use wait-queue directly instead of the deprecated sleep_on()
function. This required adding a local wait-queue. Also use new (added in
separate patch to K-J) usecs to jiffies function to convert value.
Signed-off-by: NNishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: NDomen Puncer <domen@coderock.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use msleep_interruptible() instead of schedule_timeout() to guarantee
the task delays as expected. Change the units of poll_interval to
msecs as it is only used in this delay.
Signed-off-by: NNishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: NDomen Puncer <domen@coderock.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use msleep_interruptible() instead of
schedule_timeout() to guarantee the task delays as expected.
Signed-off-by: NNishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: NMaximilian Attems <janitor@sternwelten.at>
Signed-off-by: NDomen Puncer <domen@coderock.org>

I can't see any effect of this option outside the i386-specific APM code.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use the reserved by never used NETLINK_SKIP value instead.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NCal Peake <cp@absolutedigital.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Patch from Lucas Correia Villa Real

This patch replaces the sizeof()'s %d specifier by %ld on a S3C2410 DMA
printk.
Signed-off-by: NLucas Correia Villa Real <lucasvr@gobolinux.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

http://bugzilla.kernel.org/show_bug.cgi?id=4534Signed-off-by: NLuming Yu <luming.yu@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

It is no longer valid to not replace instructions, since we depend on
different behaviour depending on CPU capabilities.

If you need to limit the capabilities of the replacements (because the
boot CPU has features that non-boot CPU's do not have, for example), you
need to explicitly disable those capabilities that are not shared across
all CPU's.

For example, if your boot CPU has FXSR, but other CPU's in your system
do not, you need to use the "nofxsr" kernel command line, not disable
instruction replacement per se.

This one ends up using an inline asm format that claims to read memory
and then clobber it (rather than just write it directly), which made it
easier to use the existing "alternative_input()" infrastructure support.

Now the fxsave code matches the fxrstor.