You could open the /proc/sys/net/ipv4/conf/<if>/<whatever> file, then
wait for interface to go away, try to grab as much memory as possible in
hope to hit the (kfreed) ctl_table. Then fill it with pointers to your
function. Then do read from file you've opened and if you are lucky,
you'll get it called as ->proc_handler() in kernel mode.
So this is at least an Oops and possibly more. It does depend on an
interface going away though, so less of a security risk than it would
otherwise be.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patch from Nicolas Pitre
Make it completely deterministic and leave nothing to chance
(even if it had at worst 0.001% probability of failing).
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Nicolas Pitre
Noticed by Woody Suwalski <woodys@xandros.com>.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Ben Dooks
Force a watchdog reset if the system fails to
decompress properly.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Dirk Opfer
This patch updates the tosa machine to use the new SharpSL PCMCIA layer introduced with Patch #3093/1
Depends on #3093/1
Signed-off-by: Dirk Opfer <Dirk@Opfer-Online.de>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Richard Purdie
The Sharp SL-Cxx00 models have a combined power control for the SD
and CF slot 0. This patch adds hooks to the scoop driver to allow
machines to provide a custom control function for this and such a
function is added for spitz/akita/borzoi.
It also moves the gpio init code into the machine files as this
is machine dependent and differs between some models. A couple of
warnings when compiling for collie are also fixed.
Signed-off-by: Richard Purdie
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Ben Dooks
Fix the map_desc entries to use the new .pfn
initialiser for the Simtec BAST machine support.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Ben Dooks
Fix the initialisation of the map_desc fields
in the Thorcom VR1000 machine support to use
the new .pfn initialiser.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Dirk Opfer
This patch adds MMC, IRDA and UDC support to the Sharp SL-6000x device. Also it adds a platform device for the keyboard driver.
Signed-off-by: Dirk Opfer
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add infrastructure for supporting per-cpu local timers to update
the profiling information and update system time accounting.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ia64 translates normal loads and stores to special MMIO regions into I/O port
accesses. Reserve these special MMIO regions in /proc/iomem.
Sample /proc/iomem:
f8100000000-f81003fffff : PCI Bus 0000:80 I/O Ports 00000000-00000fff
f8100400000-f81007fffff : PCI Bus 0000:8e I/O Ports 00001000-00001fff
f8100800000-f8100ffffff : PCI Bus 0000:9c I/O Ports 00002000-00003fff
f8101000000-f81017fffff : PCI Bus 0000:aa I/O Ports 00004000-00005fff
and corresponding /proc/ioports:
00000000-00000fff : PCI Bus 0000:80
00001000-00001fff : PCI Bus 0000:8e
00002000-00003fff : PCI Bus 0000:9c
00004000-00005fff : PCI Bus 0000:aa
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
When a page has a memory uncorrectable ECC error, the recovery
code wants to prevent the page from being reused. This change
bumps the reference count to prevent the page from getting back
on the free list.
Signed-off-by: Russ Anderson (rja@sgi.com)
Signed-off-by: Tony Luck <tony.luck@intel.com>
paddr needs to be shifted by PAGE_SHIFT to be valid
input for pfn_valid().
Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
The determination of whether an MCA is recoverable or not must
be based on the bits set in the PSP (Processor State Parameter).
The specific bits are shown in the Intel IA-64 Architecture Software
Developer's Manual, Vol 2, Table 11-6 Software Recovery Bits in
Processor State Parameter. Those bits should be consistent
across the entire IA-64 family of processors.
Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Update comment on get_user_insn to the more general "pte lock", which may
or may not be the page_table_lock. Note vmtruncate handled like kswapd.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
At the moment, attempting to invoke a signal-handler on the normal
stack is guaranteed to fail if the stack-pointer happens not to be
16-byte aligned. This is because the signal-trampoline will attempt
to store fp-regs with stf.spill instructions, which will trap for
misaligned addresses. This isn't terribly useful behavior. It's
better to just always align the signal frame to the next lower 16-byte
boundary.
Signed-off-by: David Mosberger-Tang <David.Mosberger@acm.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
The original memory less node allocation attempted to use NODEDATA_ALIGN for
alignment. The bootmem allocator only allows a power of two alignments. This
causes a BUG_ON for some nodes. For cpu only nodes just allocate with a
PERCPU_PAGE_SIZE alignment.
Some older firmware reports SLIT distances of 0xff and results in bestnode
not being computed. This is now treated correctly.
The failed allocation check was removed because it's redundant. The
bootmem allocator already makes this check.
This fix has been boot tested on 4 node machine which has 4 cpu only nodes
and 1 memory node. Thanks to Pete Keilty for reporting this and helping me
test it.
Signed-off-by: Bob Picco <bob.picco@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
arch/arm/kernel/irq.c:998:26: warning: Using plain integer as NULL pointer
arch/arm/kernel/smp.c:145:25: warning: Using plain integer as NULL pointer
arch/arm/kernel/smp.c:362:5: warning: symbol 'smp_call_function_on_cpu' was not declared. Should it be static?
drivers/video/amba-clcd.c:521:12: warning: symbol 'amba_clcdfb_init' was not declared. Should it be static?
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This factors out the common bits of arch/powerpc/xmon/start_*.c into
a new nonstdio.c, and removes some stuff that was supposed to make
xmon's I/O routines somewhat stdio-like but was never used.
It also makes the parsing of the xmon= command line option common,
so that ppc32 can now use xmon={off,on,early} also.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Some powermac machines were crashing in the quiesce firmware call
in prom_init.c because we have just closed the OF stdin device;
notably my 1999 G3 powerbook does this. To avoid this, don't
close the OF stdin device on powermacs.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Until we have local timer support, we need to broadcast the
timer interrupt to the other CPUs. Also, add the missing
smp_send_timer() prototype to asm/smp.h
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ppc64 needs a special sysfs probe file for adding new memory.
Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
memmap_init_zone() sets page count to 1. Before 'freeing' the
page, we need to clear the count. This is the same that is done
on free_all_bootmem_core() for memory discovered at boot time.
Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Add the create_section_mapping() routine to create hptes for memory
sections dynamically added after system boot.
Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
For some stupid reason I can't explain (brown paper bag is at hand), I
removed the check pfn_valid() in the code that does the icache/dcache
coherency on POWER4 and later. That causes us to eventually try to
access non existing struct page when hashing in IO pages.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
On Tue, Nov 08, 2005 at 08:12:56AM +1100, Benjamin Herrenschmidt wrote:
> Yes, the MAX_ORDER should be different indeed. But can Kconfig do that ?
> That is have the default value be different based on a Kconfig option ?
> I don't see that ... We may have to do things differently here...
This seems to be done in other parts of the Kconfig file. Using those
as an example, this should keep the MAX_ORDER block size at 16MB.
Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Even though we can enable and disable xmon at runtime now, there are a
few places in the merge tree that call xmon and xmon_printf directly.
In the case below we call die() which will call xmon if it is enabled.
Also remove an unnecessary include of xmon.h in smp.c.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Oprofile was hardwiring the MMCRA sample bit to 1 but on newer cpus
(eg POWER5) we want to vary it based on the group being sampled.
Add a temporary workaround until people update their oprofile userspace.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
On ppc64 we end up with a negative value for the data size in the memory
boot message:
Memory: 2035560k/2097152k available (5792k kernel code, 89564k reserved,
18014398509481632k data, 870k bss, 352k init)
It turns out the section ordering of the linker script is different on
ppc32 and ppc64, so just count data as _edata - _sdata which should work
on both.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
xmon() prototype is inconsistent between ARCH=ppc and ARCH=powerpc,
thus causing ARCH=ppc build breakage.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Building a PowerMac kernel with ARCH=powerpc causes a bunch of warnings,
this fixes some of them
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Some more U3 revisions have the missing "interrupts" property in U3,
this adds them to the fixup code in prom_init.c
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This patch updates g5_defconfig for ARCH=powerpc in order to add the SMU
support & thermal drivers to it, the pmac sound driver (works on some
G5s) and replaces rivafb with nvidiafb which works better for the cards
found in G5 based machines.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This patch adds the ability to the SMU driver to recover missing
calibration partitions from the SMU chip itself. It also adds some
dynamic mecanism to /proc/device-tree so that new properties are visible
to userland.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
CPU freq support using 970FX powertune facility for iMac G5 and SMU
based single CPU desktop.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
OK, the Fedora ppc32 and ppc64 kernels should both be arch/powerpc by
tomorrow. They're booting on G5, POWER5, and my powerbook. I'll test
pmac SMP and Pegasos later -- but pmac smp is known broken in arch/ppc
anyway, and I'll live with a potential Pegasos regression for now; it
wasn't supported officially in FC4 either.
I needed to fix ppc32 initrd -- we were never setting initrd_start.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
drivers/drm/ now implements proper ->compat_ioctl methods, so this isn't
needed anymore.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
