09 Dec, 2006
4 commits
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This patch replaces bitreverse() by bitrev32. The only users of bitreverse()
are crc32 itself and via-velocity.Cc: Jeff Garzik
Cc: Matt Domsch
Signed-off-by: Akinobu Mita
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch provides two bit reverse functions and bit reverse table.
- reverse the order of bits in a u32 value
u8 bitrev8(u8 x);
- reverse the order of bits in a u32 value
u32 bitrev32(u32 x);
- byte reverse table
const u8 byte_rev_table[256];
Signed-off-by: Akinobu Mita
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This makes i386 use the generic BUG machinery. There are no functional
changes from the old i386 implementation.The main advantage in using the generic BUG machinery for i386 is that the
inlined overhead of BUG is just the ud2a instruction; the file+line(+function)
information are no longer inlined into the instruction stream. This reduces
cache pollution, and makes disassembly work properly.Signed-off-by: Jeremy Fitzhardinge
Cc: Andi Kleen
Cc: Hugh Dickens
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Rusty Russell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds common handling for kernel BUGs, for use by architectures as
they wish. The code is derived from arch/powerpc.The advantages of having common BUG handling are:
- consistent BUG reporting across architectures
- shared implementation of out-of-line file/line data
- implement CONFIG_DEBUG_BUGVERBOSE consistentlyThis means that in inline impact of BUG is just the illegal instruction
itself, which is an improvement for i386 and x86-64.A BUG is represented in the instruction stream as an illegal instruction,
which has file/line information associated with it. This extra information is
stored in the __bug_table section in the ELF file.When the kernel gets an illegal instruction, it first confirms it might
possibly be from a BUG (ie, in kernel mode, the right illegal instruction).
It then calls report_bug(). This searches __bug_table for a matching
instruction pointer, and if found, prints the corresponding file/line
information. If report_bug() determines that it wasn't a BUG which caused the
trap, it returns BUG_TRAP_TYPE_NONE.Some architectures (powerpc) implement WARN using the same mechanism; if the
illegal instruction was the result of a WARN, then report_bug(Q) returns
CONFIG_DEBUG_BUGVERBOSE; otherwise it returns BUG_TRAP_TYPE_BUG.lib/bug.c keeps a list of loaded modules which can be searched for __bug_table
entries. The architecture must call
module_bug_finalize()/module_bug_cleanup() from its corresponding
module_finalize/cleanup functions.Unsetting CONFIG_DEBUG_BUGVERBOSE will reduce the kernel size by some amount.
At the very least, filename and line information will not be recorded for each
but, but architectures may decide to store no extra information per BUG at
all.Unfortunately, gcc doesn't have a general way to mark an asm() as noreturn, so
architectures will generally have to include an infinite loop (or similar) in
the BUG code, so that gcc knows execution won't continue beyond that point.
gcc does have a __builtin_trap() operator which may be useful to achieve the
same effect, unfortunately it cannot be used to actually implement the BUG
itself, because there's no way to get the instruction's address for use in
generating the __bug_table entry.[randy.dunlap@oracle.com: Handle BUG=n, GENERIC_BUG=n to prevent build errors]
[bunk@stusta.de: include/linux/bug.h must always #include
Cc: Andi Kleen
Cc: Hugh Dickens
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Rusty Russell
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Dec, 2006
10 commits
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* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (156 commits)
[PATCH] x86-64: Export smp_call_function_single
[PATCH] i386: Clean up smp_tune_scheduling()
[PATCH] unwinder: move .eh_frame to RODATA
[PATCH] unwinder: fully support linker generated .eh_frame_hdr section
[PATCH] x86-64: don't use set_irq_regs()
[PATCH] x86-64: check vector in setup_ioapic_dest to verify if need setup_IO_APIC_irq
[PATCH] x86-64: Make ix86 default to HIGHMEM4G instead of NOHIGHMEM
[PATCH] i386: replace kmalloc+memset with kzalloc
[PATCH] x86-64: remove remaining pc98 code
[PATCH] x86-64: remove unused variable
[PATCH] x86-64: Fix constraints in atomic_add_return()
[PATCH] x86-64: fix asm constraints in i386 atomic_add_return
[PATCH] x86-64: Correct documentation for bzImage protocol v2.05
[PATCH] x86-64: replace kmalloc+memset with kzalloc in MTRR code
[PATCH] x86-64: Fix numaq build error
[PATCH] x86-64: include/asm-x86_64/cpufeature.h isn't a userspace header
[PATCH] unwinder: Add debugging output to the Dwarf2 unwinder
[PATCH] x86-64: Clarify error message in GART code
[PATCH] x86-64: Fix interrupt race in idle callback (3rd try)
[PATCH] x86-64: Remove unwind stack pointer alignment forcing again
...Fixed conflict in include/linux/uaccess.h manually
Signed-off-by: Linus Torvalds
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Make the locking self-test failures (of 'FAILURE' type) easier to debug by
printing more information.Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Always build hweight8/16/32/64() functions into the kernel so that loadable
modules may use them.I didn't remove GENERIC_HWEIGHT since ALPHA_EV67, ia64, and some variants
of UltraSparc(64) provide their own hweight functions.Fixes config/build problems with NTFS=m and JOYSTICK_ANALOG=m.
Kernel: arch/x86_64/boot/bzImage is ready (#19)
Building modules, stage 2.
MODPOST 94 modules
WARNING: "hweight32" [fs/ntfs/ntfs.ko] undefined!
WARNING: "hweight16" [drivers/input/joystick/analog.ko] undefined!
WARNING: "hweight8" [drivers/input/joystick/analog.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There was lots of #ifdef noise in the kernel due to hotcpu_notifier(fn,
prio) not correctly marking 'fn' as used in the !HOTPLUG_CPU case, and thus
generating compiler warnings of unused symbols, hence forcing people to add
#ifdefs.the compiler can skip truly unused functions just fine:
text data bss dec hex filename
1624412 728710 3674856 6027978 5bfaca vmlinux.before
1624412 728710 3674856 6027978 5bfaca vmlinux.after[akpm@osdl.org: topology.c fix]
Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This allows a hyphenated range of positive numbers in the string passed
to command line helper function, get_options.Currently the command line option "isolcpus=" takes as its argument a
list of cpus.Format: ,...,
Valid values of include all cpus, 0 to "number of CPUs in
system - 1". This can get extremely long when isolating the majority of
cpus on a large system. The kernel isolcpus code would not need any
changing to use this feature. To use it, the change would be in the
command line format for 'isolcpus='
Format:
,...,
or
- (must be a positive range in ascending
order.)
or a mixture
,...,-Signed-off-by: Derek Fults
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Print the other (hopefully) known good pointer when list_head debugging
too, which may yield additional clues.Also fix for 80-columns to win akpm brownie points.
Signed-off-by: Dave Jones
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make PRINTK_TIME depend on PRINTK. Only display/offer it if PRINTK is
enabled.Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make radix tree lookups safe to be performed without locks. Readers are
protected against nodes being deleted by using RCU based freeing. Readers
are protected against new node insertion by using memory barriers to ensure
the node itself will be properly written before it is visible in the radix
tree.Each radix tree node keeps a record of their height (above leaf nodes).
This height does not change after insertion -- when the radix tree is
extended, higher nodes are only inserted in the top. So a lookup can take
the pointer to what is *now* the root node, and traverse down it even if
the tree is concurrently extended and this node becomes a subtree of a new
root."Direct" pointers (tree height of 0, where root->rnode points directly to
the data item) are handled by using the low bit of the pointer to signal
whether rnode is a direct pointer or a pointer to a radix tree node.When a reader wants to traverse the next branch, they will take a copy of
the pointer. This pointer will be either NULL (and the branch is empty) or
non-NULL (and will point to a valid node).[akpm@osdl.org: cleanups]
[Lee.Schermerhorn@hp.com: bugfixes, comments, simplifications]
[clameter@sgi.com: build fix]
Signed-off-by: Nick Piggin
Cc: "Paul E. McKenney"
Signed-off-by: Lee Schermerhorn
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Replace all uses of kmem_cache_t with struct kmem_cache.
The patch was generated using the following script:
#!/bin/sh
#
# Replace one string by another in all the kernel sources.
#set -e
for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do
quilt add $file
sed -e "1,\$s/$1/$2/g" $file >/tmp/$$
mv /tmp/$$ $file
quilt refresh
doneThe script was run like this
sh replace kmem_cache_t "struct kmem_cache"
Signed-off-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Dec, 2006
1 commit
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When a spinlock lockup occurs, arrange for the NMI code to emit an all-cpu
backtrace, so we get to see which CPU is holding the lock, and where.Cc: Andi Kleen
Cc: Ingo Molnar
Cc: Badari Pulavarty
Signed-off-by: Andrew Morton
Signed-off-by: Andi Kleen
05 Dec, 2006
1 commit
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* master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc: (194 commits)
[POWERPC] Add missing EXPORTS for mpc52xx support
[POWERPC] Remove obsolete PPC_52xx and update CLASSIC32 comment
[POWERPC] ps3: add a default zImage target
[POWERPC] Add of_platform_bus support to mpc52xx psc uart driver
[POWERPC] typo fix and whitespace cleanup on mpc52xx-uart driver
[POWERPC] Fix debug printks for 32-bit resources in the PCI code
[POWERPC] Replace kmalloc+memset with kzalloc
[POWERPC] Linkstation / kurobox support
[POWERPC] Add the e300c3 core to the CPU table.
[POWERPC] ppc: m48t35 add missing bracket
[POWERPC] iSeries: don't build head_64.o unnecessarily
[POWERPC] iSeries: stop dt_mod.o being rebuilt unnecessarily
[POWERPC] Fix cputable.h for combined build
[POWERPC] Allow CONFIG_BOOTX_TEXT on iSeries
[POWERPC] Allow xmon to build on legacy iSeries
[POWERPC] Change ppc64_defconfig to use AUTOFS_V4 not V3
[POWERPC] Tell firmware we can handle POWER6 compatible mode
[POWERPC] Clean images in arch/powerpc/boot
[POWERPC] Fix OF pci flags parsing
[POWERPC] defconfig for lite5200 board
...
04 Dec, 2006
2 commits
-
Signed-off-by: Al Viro
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Allow architectures to provide their own implementation of the big endian MMIO
accessors and "repeat" MMIO accessors for use by the generic iomap.Signed-off-by: Linus Torvalds
More-or-less-tested-by: Benjamin Herrenschmidt
Signed-off-by: Paul Mackerras
02 Dec, 2006
2 commits
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* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (36 commits)
Driver core: show drivers in /sys/module/
Documentation/driver-model/platform.txt update/rewrite
Driver core: platform_driver_probe(), can save codespace
driver core: Use klist_remove() in device_move()
driver core: Introduce device_move(): move a device to a new parent.
Driver core: make drivers/base/core.c:setup_parent() static
driver core: Introduce device_find_child().
sysfs: sysfs_write_file() writes zero terminated data
cpu topology: consider sysfs_create_group return value
Driver core: Call platform_notify_remove later
ACPI: Change ACPI to use dev_archdata instead of firmware_data
Driver core: add dev_archdata to struct device
Driver core: convert sound core to use struct device
Driver core: change mem class_devices to be real devices
Driver core: convert fb code to use struct device
Driver core: convert firmware code to use struct device
Driver core: convert mmc code to use struct device
Driver core: convert ppdev code to use struct device
Driver core: convert PPP code to use struct device
Driver core: convert cpuid code to use struct device
... -
Provide a function device_move() to move a device to a new parent device. Add
auxilliary functions kobject_move() and sysfs_move_dir().
kobject_move() generates a new uevent of type KOBJ_MOVE, containing the
previous path (DEVPATH_OLD) in addition to the usual values. For this, a new
interface kobject_uevent_env() is created that allows to add further
environmental data to the uevent at the kobject layer.Signed-off-by: Cornelia Huck
Acked-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
30 Nov, 2006
1 commit
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Changes persistant -> persistent. www.dictionary.com does not know
persistant (with an A), but should it be one of those things you can
spell in more than one correct way, let me know.Signed-off-by: Jan Engelhardt
Signed-off-by: Adrian Bunk
30 Oct, 2006
1 commit
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* master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 3914/1: [Jornada7xx] - Typo Fix in cpu-sa1110.c (b != B)
[ARM] 3913/1: n2100: fix IRQ routing for second ethernet port
[ARM] Add KBUILD_IMAGE target support
[ARM] Fix suspend oops caused by PXA2xx PCMCIA driver
[ARM] Fix i2c-pxa slave mode support
[ARM] 3900/1: Fix VFP Division by Zero exception handling.
[ARM] 3899/1: Fix the normalization of the denormal double precision number.
[ARM] 3909/1: Disable UWIND_INFO for ARM (again)
[ARM] Add __must_check to uaccess functions
[ARM] Add realview SMP default configuration
[ARM] Fix SMP irqflags support
29 Oct, 2006
1 commit
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strstrip() does not remove the last blank from strings which only consist
of blanks.Example:
char string[] = " ";
strstrip(string);results in " ", but should produce an empty string!
The following patch solves this problem:
Acked-by: Martin Schwidefsky
Signed-off-by: Michael Holzheu
Acked-by: Pekka Enberg
Acked-by Joern Engel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Oct, 2006
1 commit
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According to Daniel Jacobowitz, UNWIND_INFO is not useful on ARM, and
in fact doesn't even compile.This patch disables the option for ARM.
Signed-off-by: Kevin Hilman
Signed-off-by: Russell King
21 Oct, 2006
1 commit
-
Qooting Adrian:
- net/sunrpc/svc.c uses highest_possible_node_id()
- include/linux/nodemask.h says highest_possible_node_id() is
out-of-line #if MAX_NUMNODES > 1- the out-of-line highest_possible_node_id() is in lib/cpumask.c
- lib/Makefile: lib-$(CONFIG_SMP) += cpumask.o
CONFIG_ARCH_DISCONTIGMEM_ENABLE=y, CONFIG_SMP=n, CONFIG_SUNRPC=y-> highest_possible_node_id() is used in net/sunrpc/svc.c
CONFIG_NODES_SHIFT defined and > 0-> include/linux/numa.h: MAX_NUMNODES > 1
-> compile error
The bug is not present on architectures where ARCH_DISCONTIGMEM_ENABLE
depends on NUMA (but m32r isn't the only affected architecture).So move the function into page_alloc.c
Cc: Adrian Bunk
Cc: Paul Jackson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2006
3 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: fm801-gp - handle errors from pci_enable_device()
Input: gameport core - handle errors returned by device_bind_driver()
Input: serio core - handle errors returned by device_bind_driver()
Lockdep: fix compile error in drivers/input/serio/serio.c
Input: serio - add lockdep annotations
Lockdep: add lockdep_set_class_and_subclass() and lockdep_set_subclass()
Input: atkbd - supress "too many keys" error message
Input: i8042 - supress ACK/NAKs when blinking during panic
Input: add missing exports to fix modular build -
This library function should be in obj-y and not in lib-y. But when we do
that it clashes unpleasantly with the assembly-language implementation in the
ia64 architecture.Instead of trying to fix it all up, just remove the generic carta_random32 in
the expectation that the recently-made-generic random32() will suffice.If/when perfmon is migrated to random32, ia64's private carta_random32
implementation can also be removed.Cc: Stephane Eranian
Cc: "Luck, Tony"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make net_random() more widely available by calling it random32
akpm: hopefully this will permit the removal of carta_random32. That needs
confirmation from Stephane - this code looks somewhat more computationally
expensive, and has a different (ie: callee-stateful) interface.[akpm@osdl.org: lots of build fixes, cleanups]
Signed-off-by: Stephen Hemminger
Signed-off-by: David S. Miller
Cc: Stephane Eranian
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Oct, 2006
1 commit
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The lack of asm-um/Kbuild is deliberate.
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
12 Oct, 2006
4 commits
-
lib/bitmap.c:bitmap_parse() is a library function that received as input a
user buffer. This seemed to have originated from the way the write_proc
function of the /proc filesystem operates.This has been reworked to not use kmalloc and eliminates a lot of
get_user() overhead by performing one access_ok before using __get_user().We need to test if we are in kernel or user space (is_user) and access the
buffer differently. We cannot use __get_user() to access kernel addresses
in all cases, for example in architectures with separate address space for
kernel and user.This function will be useful for other uses as well; for example, taking
input for /sysfs instead of /proc, so it was changed to accept kernel
buffers. We have this use for the Linux UWB project, as part as the
upcoming bandwidth allocator code.Only a few routines used this function and they were changed too.
Signed-off-by: Reinette Chatre
Signed-off-by: Inaky Perez-Gonzalez
Cc: Paul Jackson
Cc: Joe Korty
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is a follow-up patch based on the review for perfmon2. This patch
adds the carta_random32() library routine + carta_random32.h header file.This is fast, simple, and efficient pseudo number generator algorithm. We
use it in perfmon2 to randomize the sampling periods. In this context, we
do not need any fancy randomizer.Signed-off-by: stephane eranian
Cc: David Mosberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In order to encourage people to notice when they break the exported
headers, add a config option which automatically runs the sanity checks
when building vmlinux. That way, those who use allyesconfig will notice
failures.Signed-off-by: David Woodhouse
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We got several false bug reports because of enabled
CONFIG_DETECT_SOFTLOCKUP. Disable soft lockup detection on s390, since it
doesn't work on a virtualized architecture.Cc: Martin Schwidefsky
Signed-off-by: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Oct, 2006
3 commits
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This annotation makes it possible to assign a subclass on lock init. This
annotation is meant to reduce the _nested() annotations by assigning a
default subclass.One could do without this annotation and rely on lockdep_set_class()
exclusively, but that would require a manual stack of struct lock_class_key
objects.Signed-off-by: Peter Zijlstra
Signed-off-by: Dmitry Torokhov -
Signed-off-by: Dmitry Torokhov
-
struct radix_tree_root has unused upper bits of ->gfp_mask reused for
tags bitmap. Annotated.Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
06 Oct, 2006
1 commit
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Modules might want this.
Cc: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Oct, 2006
1 commit
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Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.Signed-Off-By: David Howells
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
04 Oct, 2006
1 commit
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Many files include the filename at the beginning, serveral used a wrong one.
Signed-off-by: Uwe Zeisberger
Signed-off-by: Adrian Bunk
03 Oct, 2006
1 commit
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It is a non-standard heap-sort algorithm implementation because the index
of child node is wrong . The sort function still outputs right result, but
the performance is O( n * ( log(n) + 1 ) ) , about 10% ~ 20% worse than
standard algorithm.Signed-off-by: keios
Acked-by: Matt Mackall
Acked-by: Zou Nan hai
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
