18 Dec, 2006
3 commits
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Recent workqueue changes basically make this a formal requirement.
Also, move atomic32.o from lib-y to obj-y since it exports symbols
to modules.Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Use struct irq_chip instead of hw_interrupt_type.
Delete hw_resend_irq(), totally unused.
Signed-off-by: David S. Miller
17 Dec, 2006
2 commits
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* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband:
IB/mthca: Use DEFINE_MUTEX() instead of mutex_init()
IB/mthca: Add HCA profile module parameters
IB/srp: Fix FMR mapping for 32-bit kernels and addresses above 4G
IB: Fix ib_dma_alloc_coherent() wrapper -
On architectures where the atomicity of the bit operations is handled by
external means (ie a separate spinlock to protect concurrent accesses),
just doing a direct assignment on the workqueue data field (as done by
commit 4594bf159f1962cec3b727954b7c598b07e2e737) can cause the
assignment to be lost due to lack of serialization with the bitops on
the same word.So we need to serialize the assignment with the locks on those
architectures (notably older ARM chips, PA-RISC and sparc32).So rather than using an "unsigned long", let's use "atomic_long_t",
which already has a safe assignment operation (atomic_long_set()) on
such architectures.This requires that the atomic operations use the same atomicity locks as
the bit operations do, but that is largely the case anyway. Sparc32
will probably need fixing.Architectures (including modern ARM with LL/SC) that implement sane
atomic operations for SMP won't see any of this matter.Cc: Russell King
Cc: David Howells
Cc: David Miller
Cc: Matthew Wilcox
Cc: Linux Arch Maintainers
Cc: Andrew Morton
Signed-off-by: Linus Torvalds
16 Dec, 2006
6 commits
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Nobody uses it, but it was still wrong. Using the macro argument name
'work' meant that when we used 'work' as a member name, that would also
get replaced by the macro argument.Signed-off-by: Linus Torvalds
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The ib_dma_alloc_coherent() wrapper uses a u64* for the dma_handle
parameter, unlike dma_alloc_coherent, which uses dma_addr_t*. This
means that we need a temporary variable to handle the case when
ib_dma_alloc_coherent() just falls through directly to
dma_alloc_coherent() on architectures where sizeof u64 != sizeof
dma_addr_t.Signed-off-by: Roland Dreier
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* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
[S390] cio: css_register_subchannel race.
[S390] Save prefix register for dump on panic
[S390] Fix reboot hang
[S390] Fix reboot hang on LPARs
[S390] sclp_cpi module license.
[S390] zcrypt: module unload fixes.
[S390] Hipersocket multicast queue: make sure outbound handler is called
[S390] hypfs fixes
[S390] update default configuration -
It has caused more problems than it ever really solved, and is
apparently not getting cleaned up and fixed. We can put it back when
it's stable and isn't likely to make warning or bug events worse.In the meantime, enable frame pointers for more readable stack traces.
Signed-off-by: Linus Torvalds
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Reboot hangs on LPARs without diag308 support. The reason for this is,
that before the reboot is done, the channel subsystem is shut down.
During the reset on each possible subchannel a "store subchannel" is
done. This operation can end in a program check interruption, if the
specified subchannel set is not implemented by the hardware. During
the reset, currently we do not have a program check handler, which
leads to the described kernel bug. We install now a new program check
handler for the reboot code to fix this problem.Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky -
A HiperSocket multicast queue works asynchronously. When sending
buffers, the buffer state change from PRIMED to EMPTY may happen
delayed. Reschedule the checking for changes in the outbound queue,
if there are still PRIMED buffers.Signed-off-by: Ursula Braun
Signed-off-by: Martin Schwidefsky
14 Dec, 2006
29 commits
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At least on PPC, the "op ? op : dma" construct causes a compile failure
because the dma_* is a do{}while(0) macro.This turns all of them into proper if/else to avoid this problem.
Signed-off-by: Ben Collins
Signed-off-by: Linus Torvalds -
Remove the deferred hooks and all related code as scheduled in
feature-removal-schedule.Signed-off-by: Patrick McHardy
Signed-off-by: David S. Miller -
Make fib6_node 'subtree' depend on IPV6_SUBTREES.
Signed-off-by: Kim Nordlund
Signed-off-by: David S. Miller -
Signed-off-by: Ivan Skytte Jorgensen
Signed-off-by: Sridhar Samudrala
Signed-off-by: David S. Miller -
Currently in SCTP, we maintain a local address list by rebuilding the whole
list from the device list whenever we get a address add/delete event.This patch fixes it by only adding/deleting the address for which we
receive the event.Also removed the sctp_local_addr_lock() which is no longer needed as we
now use list_for_each_safe() to traverse this list. This fixes the bugs
in sctp_copy_laddrs_xxx() routines where we do copy_to_user() while
holding this lock.Signed-off-by: Sridhar Samudrala
Signed-off-by: David S. Miller -
To do that, this makes nf_ct_l3proto_try_module_{get,put} compatible
functions. As a result we can remove '#ifdef' surrounds and direct call of
need_conntrack().Signed-off-by: Yasuyuki Kozakai
Signed-off-by: Patrick McHardy
Signed-off-by: David S. Miller -
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 4017/1: [Jornada7xx] - Updating Jornada720.c
[ARM] 3992/1: i.MX/MX1 CPU Frequency scaling support
[ARM] Provide a method to alter the control register
[ARM] 4016/1: prefetch macro is wrong wrt gcc's "delete-null-pointer-checks"
[ARM] Remove empty fixup function
[ARM] 4014/1: include drivers/hid/Kconfig
[ARM] 4013/1: clocksource driver for netx
[ARM] 4012/1: Clocksource for pxa
[ARM] Clean up ioremap code
[ARM] Unuse another Linux PTE bit
[ARM] Clean up KERNEL_RAM_ADDR
[ARM] Add sys_*at syscalls
[ARM] 4004/1: S3C24XX: UDC remove implict addition of VA to regs
[ARM] Formalise the ARMv6 processor name string
[ARM] Handle HWCAP_VFP in VFP support code
[ARM] 4011/1: AT91SAM9260: Fix compilation with NAND driver
[ARM] 4010/1: AT91SAM9260-EK board: Prepare for MACB Ethernet support -
* 'release' of master.kernel.org:/home/ftp/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Move sg_dma_{len,address} from pci.h to scatterlist.h -
platform_device_add_data() makes a copy of the data that is given to it,
and thus the parameter can be const. This removes a warning when data
from get_property() on powerpc is handed to platform_device_add_data(),
as get_property() returns a const pointer.Signed-off-by: Scott Wood
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
Signed-off-by: Russell King
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IA64 is in a tiny minority providing these defines in pci.h.
Almost everyone else has them in scatterlist.hSigned-off-by: Tony Luck
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Support to change MX1 CPU frequency at runtime.
Tested on PiKRON's PiMX1 board and seems to be fully
stable up to 200 MHz end even as low as 8 MHz.Signed-off-by: Pavel Pisa
Signed-off-by: Russell King -
i.MX needs to tweak the control register to support CPU frequency
scaling. Rather than have folk blindly try and change the control
register by writing to it and then wondering why it doesn't work,
provide a method (which is safe for UP only, and therefore only
available for UP) to achieve this.Signed-off-by: Russell King
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optimization
The gcc manual says:
|`-fdelete-null-pointer-checks'
| Use global dataflow analysis to identify and eliminate useless
| checks for null pointers. The compiler assumes that dereferencing
| a null pointer would have halted the program. If a pointer is
| checked after it has already been dereferenced, it cannot be null.
| Enabled at levels `-O2', `-O3', `-Os'.Now the problem can be seen with this test case:
#include
extern void bar(char *x);
void foo(char *x)
{
prefetch(x);
if (x)
bar(x);
}Because the constraint to the inline asm used in the prefetch() macro is
a memory operand, gcc assumes that the asm code does dereference the
pointer and the delete-null-pointer-checks optimization kicks in.
Inspection of generated assembly for the above example shows that bar()
is indeed called unconditionally without any test on the value of x.Of course in the prefetch case there is no real dereference and it
cannot be assumed that a null pointer would have been caught at that
point. This causes kernel oopses with constructs like
hlist_for_each_entry() where the list's 'next' content is prefetched
before the pointer is tested against NULL, and only when gcc feels like
applying this optimization which doesn't happen all the time with more
complex code.It appears that the way to prevent delete-null-pointer-checks
optimization to occur in this case is to make prefetch() into a static
inline function instead of a macro. At least this is what is done on
x86_64 where a similar inline asm memory operand is used (I presume they
would have seen the same problem if it didn't work) and resulting code
for the above example confirms that.An alternative would consist of replacing the memory operand by a
register operand containing the pointer, and use the addressing mode
explicitly in the asm template. But that would be less optimal than an
offsettable memory reference.Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King -
Oops, sorry about that.
Signed-off-by: Linus Torvalds
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Virtually index, physically tagged cache architectures can get away
without cache flushing when forking. This patch adds a new cache
flushing function flush_cache_dup_mm(struct mm_struct *) which for the
moment I've implemented to do the same thing on all architectures
except on MIPS where it's a no-op.Signed-off-by: Ralf Baechle
Signed-off-by: Linus Torvalds -
Provide a custom copy_user_highpage() to deal with aliasing issues on
MIPS. It uses kmap_coherent() to map an user page for kernel with same
color. Rewrite copy_to_user_page() and copy_from_user_page() with the
new interfaces to avoid extra cache flushing.The main part of this patch was originally written by Ralf Baechle;
Atushi Nemoto did the the debugging.Signed-off-by: Atsushi Nemoto
Signed-off-by: Ralf Baechle
Signed-off-by: Linus Torvalds -
To allow a more effective copy_user_highpage() on certain architectures,
a vma argument is added to the function and cow_user_page() allowing
the implementation of these functions to check for the VM_EXEC bit.The main part of this patch was originally written by Ralf Baechle;
Atushi Nemoto did the the debugging.Signed-off-by: Atsushi Nemoto
Signed-off-by: Ralf Baechle
Signed-off-by: Linus Torvalds -
Problem:
1. There is a process containing two thread (T1 and T2). The
thread T1 calls fork(). Then dup_mmap() function called on T1 context.static inline int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
...
flush_cache_mm(current->mm);
... /* A */
(write-protect all Copy-On-Write pages)
... /* B */
flush_tlb_mm(current->mm);
...2. When preemption happens between A and B (or on SMP kernel), the
thread T2 can run and modify data on COW pages without page fault
(modified data will stay in cache).3. Some time after fork() completed, the thread T2 may cause a page
fault by write-protect on a COW page.4. Then data of the COW page will be copied to newly allocated
physical page (copy_cow_page()). It reads data via kernel mapping.
The kernel mapping can have different 'color' with user space
mapping of the thread T2 (dcache aliasing). Therefore
copy_cow_page() will copy stale data. Then the modified data in
cache will be lost.In order to allow architecture code to deal with this problem allow
architecture code to override copy_user_highpage() by defining
__HAVE_ARCH_COPY_USER_HIGHPAGE in .The main part of this patch was originally written by Ralf Baechle;
Atushi Nemoto did the the debugging.Signed-off-by: Atsushi Nemoto
Signed-off-by: Ralf Baechle
Signed-off-by: Linus Torvalds -
* 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
hwmon: Add MAINTAINERS entry for new ams driver
hwmon: New AMS hardware monitoring driver
hwmon/w83793: Add documentation and maintainer
hwmon: New Winbond W83793 hardware monitoring driver
hwmon: Update Rudolf Marek's e-mail address
hwmon/f71805f: Fix the device address decoding
hwmon/f71805f: Always create all fan inputs
hwmon/f71805f: Add support for the Fintek F71872F/FG chip
hwmon: New PC87427 hardware monitoring driver
hwmon/it87: Remove the SMBus interface support
hwmon/hdaps: Update the list of supported devices
hwmon/hdaps: Move the DMI detection data to .data
hwmon/pc87360: Autodetect the VRM version
hwmon/f71805f: Document the fan control features
hwmon/f71805f: Add support for "speed mode" fan speed control
hwmon/f71805f: Support DC fan speed control mode
hwmon/f71805f: Let the user adjust the PWM base frequency
hwmon/f71805f: Add manual fan speed control
hwmon/f71805f: Store the fan control registers -
Run this:
#!/bin/sh
for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do
echo "De-casting $f..."
perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f
doneAnd then go through and reinstate those cases where code is casting pointers
to non-pointers.And then drop a few hunks which conflicted with outstanding work.
Cc: Russell King , Ian Molton
Cc: Mikael Starvik
Cc: Yoshinori Sato
Cc: Roman Zippel
Cc: Geert Uytterhoeven
Cc: Ralf Baechle
Cc: Paul Mackerras
Cc: Kyle McMartin
Cc: Benjamin Herrenschmidt
Cc: Martin Schwidefsky
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Greg KH
Cc: Jens Axboe
Cc: Paul Fulghum
Cc: Alan Cox
Cc: Karsten Keil
Cc: Mauro Carvalho Chehab
Cc: Jeff Garzik
Cc: James Bottomley
Cc: Ian Kent
Cc: Steven French
Cc: David Woodhouse
Cc: Neil Brown
Cc: Jaroslav Kysela
Cc: Takashi Iwai
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Modify the sstfb (Voodoo1/2) driver:
- fix a memleak when removing the sstfb module
- fix sstfb to use the fbdev default videomode database
- add module option "mode_option" to set initial screen mode
- add sysfs-interface to turn VGA-passthrough on/off via
/sys/class/graphics/fbX/vgapass- remove old debug functions from ioctl interface
Signed-off-by: Helge Deller
Acked-By: James Simmons
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove references to non-existent fbmon_valid_timings()
Signed-off-by: Geert Uytterhoeven
Cc: James Simmons
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Define an op descriptor struct, use it to simplify nfsd4_proc_compound().
Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Tuck away the replay_owner in the cstate while we're at it.
Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pass the saved and current filehandles together into all the nfsd4 compound
operations.I want a unified interface to these operations so we can just call them by
pointer and throw out the huge switch statement.Also I'll eventually want a structure like this--that holds the state used
during compound processing--for deferral.Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A comment here incorrectly states that "slack_space" is measured in words, not
bytes. Remove the comment, and adjust a variable name and a few comments to
clarify the situation.This is pure cleanup; there should be no change in functionality.
Signed-off-by: J. Bruce Fields
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The BLK_DEV_SWIM_IOP driver has:
- already been marked as BROKEN in 2.6.0 three years ago and
- is still marked as BROKEN.Drivers that had been marked as BROKEN for such a long time seem to be
unlikely to be revived in the forseeable future.But if anyone wants to ever revive this driver, the code is still
present in the older kernel releases.Signed-off-by: Adrian Bunk
Cc: Jens Axboe
Acked-by: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch converts the tracking of the user space watchdog process from using
a pid_t to use struct pid. This makes us safe from pid wrap around issues and
prepares the way for the pid namespace.Signed-off-by: Eric W. Biederman
Cc: Petr Vandrovec
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
