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depending on undefined preprocessor symbols evaluating to zero.
Make panic.c use proper function prototypes.
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From: Christoph Hellwig <hch@lst.de>
Change sysrq sync/remount from a magic bdflush hook to proper pdflush
operations. The sync operation reuses most of the regular sys_sync path now
instead of implementing it's own superblock walking and (broken) local disk
detection, the remount implementation has been moved to super.c, cleaned up
and updated for the last two years locking changes. It also shares some code
with the regular remount path now.
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From: Russell Miller <rmiller@duskglow.com>
A BUG or an oops will often leave a machine in a useless state. There is no
way to remotely recover the machine from that state.
The patch adds a /proc/sys/kernel/panic_on_oops sysctl which, when set, will
cause the x86 kernel to call panic() at the end of the oops handler. If the
user has also set /proc/sys/kernel/panic then a reboot will occur.
The implementation will try to sleep for a while before panicing so the oops
info has a chance of hitting the logs.
The implementation is designed so that other architectures can easily do this
in their oops handlers.
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This implements EXPORT_SYMBOL_GPL and MODULE_LICENSE properly (so
restrictions are enforced). Also fixes "proprietory" spelling.
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Make people use the proper cli/sti replacements
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This is a massive cleanup of the IRQ subsystem. It's losely based on
Linus' original idea and DaveM's original implementation, to fold our
various irq, softirq and bh counters into the preemption counter.
with this approach it was possible:
- to remove the 'big IRQ lock' on SMP - on which sti() and cli() relied.
- to streamline/simplify arch/i386/kernel/irq.c significantly.
- to simplify the softirq code.
- to remove the preemption count increase/decrease code from the lowlevel
IRQ assembly code.
- to speed up schedule() a bit.
Global sti() and cli() is gone forever on SMP, there is no more globally
synchronizing irq-disabling capability. All code that relied on sti()
and cli() and restore_flags() must use other locking mechanisms from now
on (spinlocks and __cli()/__sti()).
obviously this patch breaks massive amounts of code, so only limited
.configs are working at the moment (UP is expected to be unaffected, but
SMP will require various driver updates).
The patch was developed and tested on SMP systems, and while the code is
still a bit rough in places, the base IRQ code appears to be pretty
robust and clean.
while it boots already so the worst is over, there is lots of work left:
eg. to fix the serial layer to not use cli()/sti() and bhs ...
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This is needed for things running on the host which want to know when UML
panics, and what the panic message was.
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Newer Athlons have means of checking if they are SMP capable or not.
This code adds checks that printk a warning on systems not intended
for SMP, and set the taint flag that modutils is already aware of.
The taint code is also improved to use defines instead of magic numbers.
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- me/Al Viro: fix bdget() oops with block device modules that don't
clean up after they exit
- Alan Cox: continued merging (drivers, license tags)
- David Miller: sparc update, network fixes
- Christoph Hellwig: work around broken drivers that add a gendisk more
than once
- Jakub Jelinek: handle more ELF loading special cases
- Trond Myklebust: NFS client and lockd reclaimer cleanups/fixes
- Greg KH: USB updates
- Mikael Pettersson: sparate out local APIC / IO-APIC config options
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- Neil Brown: md cleanups/fixes
- Andrew Morton: console locking merge
- Andrea Arkangeli: major VM merge
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