28 May, 2010
40 commits
-
There are more architectures that don't support ARCH_HAS_SG_CHAIN than
those that support it. This removes removes ARCH_HAS_SG_CHAIN in
asm-generic/scatterlist.h and lets arhictectures to define it.It's clearer than defining ARCH_HAS_SG_CHAIN asm-generic/scatterlist.h and
undefing it in arhictectures that don't support it.Signed-off-by: FUJITA Tomonori
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: FUJITA Tomonori
Acked-by: Matt Turner
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: FUJITA Tomonori
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cc: FUJITA Tomonori
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There are only two ways to define sg_dma_len(); use sg->dma_length or
sg->length. This patch introduces NEED_SG_DMA_LENGTH that enables
architectures to choose sg->dma_length or sg->length.Signed-off-by: FUJITA Tomonori
Cc: Arnd Bergmann
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Cc: Russell King
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is the first half of the attempt to use asm-generic/scatterlist.h
on every architecture.There are only two ways to define scatterlist structure. So it's easy
to convert every architecture to use asm-generic/scatterlist.h.This patch:
The trick for ISA_DMA_THRESHOLD in asm-generic/scatterlist.h doesn't work
for powerpc. This lets architectures defin ISA_DMA_THRESHOLD.Hopefully, we can remove ISA_DMA_THRESHOLD in the future; we can do better
to decide if the bouncing is necessary or not.Signed-off-by: FUJITA Tomonori
Cc: Arnd Bergmann
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Cc: Russell King
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds three new types of kernel "crashes" in the lkdtm driver to
trigger hardlockups, softlockups and task hung states at will.The first two are useful to test the new generic lockup detector and check
its further regressions. The latter one is a bonus to check the hung task
detector regressions even though it's not currently in rework.Signed-off-by: Frederic Weisbecker
Cc: Simon Kagstrom
Cc: Ingo Molnar
Cc: Don Zickus
Cc: Cyrill Gorcunov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add the necessary parts to be enable the use of LZO-compressed initramfs
build into the kernel.Signed-off-by: Albin Tonnerre
Cc: "H. Peter Anvin"
Cc: Michal Marek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
radix_tree_prev_hole() used LONG_MAX to detect underflow; however,
ULONG_MAX is clearly what was intended, both here and by its only user
(count_history_pages at mm/readahead.c).Reviewed-by: Wu Fengguang
Signed-off-by: Cesar Eduardo Barros
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The aio compat code was not converting the struct iovecs from 32bit to
64bit pointers, causing either EINVAL to be returned from io_getevents, or
EFAULT as the result of the I/O. This patch passes a compat flag to
io_submit to signal that pointer conversion is necessary for a given iocb
array.A variant of this was tested by Michael Tokarev. I have also updated the
libaio test harness to exercise this code path with good success.
Further, I grabbed a copy of ltp and ran the
testcases/kernel/syscall/readv and writev tests there (compiled with -m32
on my 64bit system). All seems happy, but extra eyes on this would be
welcome.[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix CONFIG_COMPAT=n build]
Signed-off-by: Jeff Moyer
Reported-by: Michael Tokarev
Cc: Zach Brown
Cc: [2.6.35.1]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It was reported in http://lkml.org/lkml/2010/3/8/309 that 32 bit readv and
writev AIO operations were not functioning properly. It turns out that
the code to convert the 32bit io vectors to 64 bits was never written.
The results of that can be pretty bad, but in my testing, it mostly ended
up in generating EFAULT as we walked off the list of I/O vectors provided.This patch set fixes the problem in my environment. are greatly
appreciated.This patch:
Factor out code that will be used by both compat_do_readv_writev and the
compat aio submission code paths.Signed-off-by: Jeff Moyer
Reported-by: Michael Tokarev
Cc: Zach Brown
Cc: [2.6.35.1]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Most distros turn the console verbosity down and that means a backtrace
after a panic never makes it to the console. I assume we haven't seen
this because a panic is often preceeded by an oops which will have called
console_verbose. There are however a lot of places we call panic
directly, and they are broken.Use console_verbose like we do in the oops path to ensure a directly
called panic will print a backtrace.Signed-off-by: Anton Blanchard
Acked-by: Greg Kroah-Hartman
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use ERR_CAST(x) rather than ERR_PTR(PTR_ERR(x)). The former makes more
clear what is the purpose of the operation, which otherwise looks like a
no-op.The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)//
@@
type T;
T x;
identifier f;
@@T f (...) { }
@@
expression x;
@@- ERR_PTR(PTR_ERR(x))
+ ERR_CAST(x)
//Signed-off-by: Julia Lawall
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add ARCH_KMALLOC_MINALIGN description in "Platform Issues" section.
Signed-off-by: FUJITA Tomonori
Cc: "David S. Miller"
Cc: Matt Mackall
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Handing DMA mapping errors is essential. Let's put it in the more
appropriate place rather than the end of the doc.Signed-off-by: FUJITA Tomonori
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Now we have . Architectures should use it
instead of inventing the own scatterlist struct. Let's update the
description.Signed-off-by: FUJITA Tomonori
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add the concrete DMA mapping error handling for SCSI drivers on the
queuecommand path.Signed-off-by: FUJITA Tomonori
Cc: James Bottomley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since 2.6.5, it had been commented, 'for backwards compatibility,
removed in 2.7.x'. Since 2.6.31, it have been marked as __deprecated.I think that we can remove the API safely now.
Signed-off-by: FUJITA Tomonori
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
dma_sync_single() is deprecated and will be removed soon.
No functional change since dma_sync_single is the wrapper of
dma_sync_single_for_cpu.saa7134-go7007.c is commented out but anyway let's replace it.
Signed-off-by: FUJITA Tomonori
Cc: Greg Kroah-Hartman
Cc: Ben Hutchings
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Adds the concrete DMA mapping error handling for Networking drivers on the
transmit path.Signed-off-by: FUJITA Tomonori
Acked-by: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sync_single_range_for_cpu and sync_single_range_for_device hooks are
unnecessary because sync_single_for_cpu and sync_single_for_device can
be used instead.Signed-off-by: FUJITA Tomonori
Reviewed-by: Konrad Rzeszutek Wilk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
swiotlb_sync_single_range_for_cpu and swiotlb_sync_single_range_for_device
are unnecessary because swiotlb_sync_single_for_cpu and
swiotlb_sync_single_for_device can be used instead.Signed-off-by: FUJITA Tomonori
Reviewed-by: Konrad Rzeszutek Wilk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sync_single_range_for_cpu and sync_single_range_for_device hooks in
swiotlb_dma_ops are unnecessary because sync_single_for_cpu and
sync_single_for_device are used there.Signed-off-by: FUJITA Tomonori
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Becky Bruce
Reviewed-by: Konrad Rzeszutek Wilk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sync_single_range_for_cpu and sync_single_range_for_device hooks in
swiotlb_dma_ops are unnecessary because sync_single_for_cpu and
sync_single_for_device are used there.Signed-off-by: FUJITA Tomonori
Cc: "H. Peter Anvin"
Cc: Ingo Molnar
Cc: Thomas Gleixner
Reviewed-by: Konrad Rzeszutek Wilk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sync_single_range_for_cpu and sync_single_range_for_device hooks in
swiotlb_dma_ops are unnecessary because sync_single_for_cpu and
sync_single_for_device are used there.Signed-off-by: FUJITA Tomonori
Cc: Tony Luck
Cc: Fenghua Yu
Reviewed-by: Konrad Rzeszutek Wilk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Reduces text by eliminating multiple __FILE__ uses.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Joe Perches
Cc: Doug Thompson
Cc: Mauro Carvalho Chehab
Cc: Tim Small
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch moves the definition of struct rnd_state and the inline
__seed() function to linux/random.h. It renames the static __random32()
function to prandom32() and exports it for use in modules.prandom32() is useful as a privately-seeded pseudo random number generator
that can give the same result every time it is initialized.For FCoE FC-BB-6 VN2VN mode self-selected unique FC address generation, we
need an pseudo-random number generator seeded with the 64-bit world-wide
port name. A truly random generator or one seeded with randomness won't
do because the same sequence of numbers should be generated each time we
boot or the link comes up.A prandom32_seed() inline function is added to the header file. It is
inlined not for speed, but so the function won't be expanded in the base
kernel, but only in the module that uses it.Signed-off-by: Joe Eykholt
Acked-by: Matt Mackall
Cc: Theodore Ts'o
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cosmetic, no changes in the compiled code. Just s/NULL/SIG_DFL/ to make
it more readable and grep-friendly.Note: probably SIG_IGN makes more sense, we could kill ignore_signals().
But then kernel_init() should do flush_signal_handlers() before exec().Signed-off-by: Oleg Nesterov
Cc: Cedric Le Goater
Cc: Dave Hansen
Cc: Eric Biederman
Cc: Herbert Poetzl
Cc: Mathias Krause
Acked-by: Roland McGrath
Acked-by: Serge Hallyn
Cc: Sukadev Bhattiprolu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
copy_process(pid => &init_struct_pid) doesn't do attach_pid/etc.
It shouldn't, but this means that the idle threads run with the wrong
pids copied from the caller's task_struct. In x86 case the caller is
either kernel_init() thread or keventd.In particular, this means that after the series of cpu_up/cpu_down an
idle thread (which never exits) can run with .pid pointing to nowhere.Change fork_idle() to initialize idle->pids[] correctly. We only set
.pid = &init_struct_pid but do not add .node to list, INIT_TASK() does
the same for the boot-cpu idle thread (swapper).Signed-off-by: Oleg Nesterov
Cc: Cedric Le Goater
Cc: Dave Hansen
Cc: Eric Biederman
Cc: Herbert Poetzl
Cc: Mathias Krause
Acked-by: Roland McGrath
Acked-by: Serge Hallyn
Cc: Sukadev Bhattiprolu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
"statically initialize struct pid for swapper" commit 820e45db says:
Statically initialize a struct pid for the swapper process (pid_t == 0)
and attach it to init_task. This is needed so task_pid(), task_pgrp()
and task_session() interfaces work on the swapper process also.OK, but:
- it doesn't make sense to add init_task.pids[].node into
init_struct_pid.tasks[], and in fact this just wrong.idle threads are special, they shouldn't be visible on any
global list. In particular do_each_pid_task(init_struct_pid)
shouldn't see swapper.This is the actual reason why kill(0, SIGKILL) from /sbin/init
(which starts with 0,0 special pids) crashes the kernel. The
signal sent to pgid/sid == 0 must never see idle threads, even
if the previous patch fixed the crash itself.- we have other idle threads running on the non-boot CPUs, see
the next patch.Change INIT_STRUCT_PID/INIT_PID_LINK to create the empty/unhashed
hlist_head/hlist_node. Like any other idle thread swapper can never exit,
so detach_pid()->__hlist_del() is not possible, but we could change
INIT_PID_LINK() to set pprev = &next if needed.All we need is the valid swapper->pids[].pid == &init_struct_pid.
Reported-by: Mathias Krause
Signed-off-by: Oleg Nesterov
Cc: Cedric Le Goater
Cc: Dave Hansen
Cc: Eric Biederman
Cc: Herbert Poetzl
Cc: Mathias Krause
Acked-by: Roland McGrath
Acked-by: Serge Hallyn
Cc: Sukadev Bhattiprolu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The trivial /sbin/init doing
int main(void)
{
kill(0, SIGKILL)
}crashes the kernel.
This happens because __kill_pgrp_info(init_struct_pid) also sends SIGKILL
to the swapper process which runs with the uninitialized ->thread_group.Change INIT_TASK() to initialize ->thread_group properly.
Note: the real problem is that the swapper process must not be visible to
signals, see the next patch. But this change is right anyway and fixes
the crash.Reported-and-tested-by: Mathias Krause
Signed-off-by: Oleg Nesterov
Cc: Cedric Le Goater
Cc: Dave Hansen
Cc: Eric Biederman
Cc: Herbert Poetzl
Cc: Mathias Krause
Acked-by: Roland McGrath
Acked-by: Serge Hallyn
Acked-by: Sukadev Bhattiprolu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On a system with a substantial number of processors, the early default
pid_max of 32k will not be enough. A system with 1664 CPU's, there are
25163 processes started before the login prompt. It's estimated that with
2048 CPU's we will pass the 32k limit. With 4096, we'll reach that limit
very early during the boot cycle, and processes would stall waiting for an
available pid.This patch increases the early maximum number of pids available, and
increases the minimum number of pids that can be set during runtime.[akpm@linux-foundation.org: fix warnings]
Signed-off-by: Hedi Berriche
Signed-off-by: Mike Travis
Signed-off-by: Robin Holt
Acked-by: Linus Torvalds
Cc: Ingo Molnar
Cc: Pavel Machek
Cc: Alan Cox
Cc: Greg KH
Cc: Rik van Riel
Cc: John Stoffel
Cc: Jack Steiner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix the maintenance access functions to farend RapidIO devices.
1. Fixed shift of the given offset, to open the maintenance window
2. Mask offset to limit access to the opened maintenance window
3. Added extended destid part to rowtear register, required for 16bit modeThis method is matching maintenance transactions generation described
by Freescale in the appnote AN2932. With this modification full access
to a 16MB maintenance window is possible, this patch is required for
IDT cps switches. For easier handling of the access routines, the
access was limited to aligned memory regions. This should be no problem
because all registers are 32bit wide.Signed-off-by: Thomas Moll
Tested-by: Alexandre Bounine
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix to use correct default value for routing table entries.
Signed-off-by: Alexandre Bounine
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Cc: Thomas Moll
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add switch specific domain routines required for 16-bit routing support in
switches with hierarchical implementation of routing tables.Signed-off-by: Alexandre Bounine
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Cc: Thomas Moll
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Modify the way how RapidIO switch operations are declared. Multiple
assignments through the linker script replaced by single initialization
call.Signed-off-by: Alexandre Bounine
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Cc: Thomas Moll
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add debug configuration option for RapidIO subsystem.
Signed-off-by: Alexandre Bounine
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Cc: Thomas Moll
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Alexandre Bounine
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Cc: Thomas Moll
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add the functionality to enable Input receiver and Output transmitter of
every port, to allow non-maintenance traffic.Signed-off-by: Thomas Moll
Signed-off-by: Alexandre Bounine
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add Machine Check exception handling into RapidIO port driver for
Freescale SoCs (MPC85xx).Signed-off-by: Alexandre Bounine
Tested-by: Thomas Moll
Cc: Matt Porter
Cc: Li Yang
Cc: Kumar Gala
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
