01 Apr, 2014
1 commit
-
Pull core locking updates from Ingo Molnar:
"The biggest change is the MCS spinlock generalization changes from Tim
Chen, Peter Zijlstra, Jason Low et al. There's also lockdep
fixes/enhancements from Oleg Nesterov, in particular a false negative
fix related to lockdep_set_novalidate_class() usage"* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
locking/mutex: Fix debug checks
locking/mutexes: Add extra reschedule point
locking/mutexes: Introduce cancelable MCS lock for adaptive spinning
locking/mutexes: Unlock the mutex without the wait_lock
locking/mutexes: Modify the way optimistic spinners are queued
locking/mutexes: Return false if task need_resched() in mutex_can_spin_on_owner()
locking: Move mcs_spinlock.h into kernel/locking/
m68k: Skip futex_atomic_cmpxchg_inatomic() test
futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() test
Revert "sched/wait: Suppress Sparse 'variable shadowing' warning"
lockdep: Change lockdep_set_novalidate_class() to use _and_name
lockdep: Change mark_held_locks() to check hlock->check instead of lockdep_no_validate
lockdep: Don't create the wrong dependency on hlock->check == 0
lockdep: Make held_lock->check and "int check" argument bool
locking/mcs: Allow architecture specific asm files to be used for contended case
locking/mcs: Order the header files in Kbuild of each architecture in alphabetical order
sched/wait: Suppress Sparse 'variable shadowing' warning
hung_task/Documentation: Fix hung_task_warnings description
locking/mcs: Allow architectures to hook in to contended paths
locking/mcs: Micro-optimize the MCS code, add extra comments
...
08 Mar, 2014
1 commit
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Pull c6x build fix from Mark Salter:
"Build fix for c6x"* tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
c6x: fix build failure caused by cache.h
05 Mar, 2014
1 commit
-
A patch to linux/irqflags.h uncovered a problem with c6x asm/cache.h
which causes a build failure:/arch/c6x/include/asm/cache.h:63:20: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘c6x_cache_init’
extern void __init c6x_cache_init(void);The asm/cache.h was relying on linux/irqflags.h to pull in linux/init.h
but the recent patch changed that. The c6x header should have included
linux/init.h all along.Signed-off-by: Mark Salter
10 Feb, 2014
2 commits
-
This patch allows each architecture to add its specific assembly optimized
arch_mcs_spin_lock_contended and arch_mcs_spinlock_uncontended for
MCS lock and unlock functions.Signed-off-by: Tim Chen
Cc: Scott J Norton
Cc: Raghavendra K T
Cc: AswinChandramouleeswaran
Cc: George Spelvin
Cc: Rik vanRiel
Cc: Andrea Arcangeli
Cc: MichelLespinasse
Cc: Peter Hurley
Cc: Andi Kleen
Cc: Alex Shi
Cc: Dave Hansen
Cc: Tim Chen
Cc: Arnd Bergmann
Cc: "Figo.zhang"
Cc: "Paul E.McKenney"
Cc: "H. Peter Anvin"
Cc: Davidlohr Bueso
Cc: Waiman Long
Cc: Ingo Molnar
Cc: Will Deacon
Cc: Andrew Morton
Cc: Linus Torvalds
Cc: Matthew R Wilcox
Signed-off-by: Peter Zijlstra
Link: http://lkml.kernel.org/r/1390347382.3138.67.camel@schen9-DESK
Signed-off-by: Ingo Molnar -
We perform a clean up of the Kbuid files in each architecture.
We order the files in each Kbuild in alphabetical order
by running the below script.for i in arch/*/include/asm/Kbuild
do
cat $i | gawk '/^generic-y/ {
i = 3;
do {
for (; i ${i}.sorted;
mv ${i}.sorted $i;
doneSigned-off-by: Tim Chen
Cc: Arnd Bergmann
Cc: Matthew R Wilcox
Cc: AswinChandramouleeswaran
Cc: Dave Hansen
Cc: "Paul E.McKenney"
Cc: Scott J Norton
Cc: Will Deacon
Cc: "Figo.zhang"
Cc: Linus Torvalds
Cc: Rik van Riel
Cc: Waiman Long
Cc: Peter Hurley
Cc: Andrea Arcangeli
Cc: Tim Chen
Cc: Alex Shi
Cc: Raghavendra K T
Cc: Andi Kleen
Cc: George Spelvin
Cc: MichelLespinasse
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Davidlohr Bueso
Cc: Andrew Morton
Signed-off-by: Peter Zijlstra
[ Fixed build bug. ]
Signed-off-by: Ingo Molnar
18 Dec, 2013
1 commit
-
Reported-by: Stephen Rothwell
Signed-off-by: David S. Miller
20 Nov, 2013
1 commit
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Pull irq cleanups from Ingo Molnar:
"This is a multi-arch cleanup series from Thomas Gleixner, which we
kept to near the end of the merge window, to not interfere with
architecture updates.This series (motivated by the -rt kernel) unifies more aspects of IRQ
handling and generalizes PREEMPT_ACTIVE"* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
preempt: Make PREEMPT_ACTIVE generic
sparc: Use preempt_schedule_irq
ia64: Use preempt_schedule_irq
m32r: Use preempt_schedule_irq
hardirq: Make hardirq bits generic
m68k: Simplify low level interrupt handling code
genirq: Prevent spurious detection for unconditionally polled interrupts
16 Nov, 2013
1 commit
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Pull Kconfig cleanups from Mark Salter:
"Remove some unused config options from C6X and clean up PC_PARPORT
dependencies. The latter was discussed here:https://lkml.org/lkml/2013/10/8/12"
* tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
c6x: remove unused COMMON_CLKDEV Kconfig parameter
Kconfig cleanup (PARPORT_PC dependencies)
x86: select ARCH_MIGHT_HAVE_PC_PARPORT
unicore32: select ARCH_MIGHT_HAVE_PC_PARPORT
sparc: select ARCH_MIGHT_HAVE_PC_PARPORT
sh: select ARCH_MIGHT_HAVE_PC_PARPORT
powerpc: select ARCH_MIGHT_HAVE_PC_PARPORT
parisc: select ARCH_MIGHT_HAVE_PC_PARPORT
mips: select ARCH_MIGHT_HAVE_PC_PARPORT
microblaze: select ARCH_MIGHT_HAVE_PC_PARPORT
m68k: select ARCH_MIGHT_HAVE_PC_PARPORT
ia64: select ARCH_MIGHT_HAVE_PC_PARPORT
arm: select ARCH_MIGHT_HAVE_PC_PARPORT
alpha: select ARCH_MIGHT_HAVE_PC_PARPORT
c6x: remove unused parameter in Kconfig
14 Nov, 2013
1 commit
-
No point in having this bit defined by architecture.
Signed-off-by: Thomas Gleixner
Acked-by: Peter Zijlstra
Link: http://lkml.kernel.org/r/20130917183629.090698799@linutronix.de
12 Nov, 2013
1 commit
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Pull devicetree updates from Rob Herring:
"DeviceTree updates for 3.13. This is a bit larger pull request than
usual for this cycle with lots of clean-up.- Cross arch clean-up and consolidation of early DT scanning code.
- Clean-up and removal of arch prom.h headers. Makes arch specific
prom.h optional on all but Sparc.
- Addition of interrupts-extended property for devices connected to
multiple interrupt controllers.
- Refactoring of DT interrupt parsing code in preparation for
deferred probe of interrupts.
- ARM cpu and cpu topology bindings documentation.
- Various DT vendor binding documentation updates"* tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (82 commits)
powerpc: add missing explicit OF includes for ppc
dt/irq: add empty of_irq_count for !OF_IRQ
dt: disable self-tests for !OF_IRQ
of: irq: Fix interrupt-map entry matching
MIPS: Netlogic: replace early_init_devtree() call
of: Add Panasonic Corporation vendor prefix
of: Add Chunghwa Picture Tubes Ltd. vendor prefix
of: Add AU Optronics Corporation vendor prefix
of/irq: Fix potential buffer overflow
of/irq: Fix bug in interrupt parsing refactor.
of: set dma_mask to point to coherent_dma_mask
of: add vendor prefix for PHYTEC Messtechnik GmbH
DT: sort vendor-prefixes.txt
of: Add vendor prefix for Cadence
of: Add empty for_each_available_child_of_node() macro definition
arm/versatile: Fix versatile irq specifications.
of/irq: create interrupts-extended property
microblaze/pci: Drop PowerPC-ism from irq parsing
of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code.
of/irq: Use irq_of_parse_and_map()
...
30 Oct, 2013
1 commit
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This removes the COMMON_CLKDEV kernel configuration
parameter defined in arch/c6x/Kconfig, but used nowhere
in the makefiles and source code.Signed-off-by: Michael Opdenacker
Signed-off-by: Mark Salter
10 Oct, 2013
4 commits
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Now that prom.h is optional, all the empty prom.h headers can be removed.
Signed-off-by: Rob Herring
Acked-by: Vineet Gupta
Acked-by: Catalin Marinas
Acked-by: Grant Likely
Cc: Will Deacon
Cc: Mark Salter
Cc: Aurelien Jacquiot
Cc: James Hogan
Cc: Jonas Bonn
Cc: Chris Zankel
Cc: Max Filippov -
All arches do essentially the same thing now for
early_init_dt_setup_initrd_arch, so it can now be removed.Signed-off-by: Rob Herring
Acked-by: Vineet Gupta
Cc: Russell King
Cc: Mark Salter
Cc: Aurelien Jacquiot
Cc: James Hogan
Cc: Michal Simek
Cc: Ralf Baechle
Cc: Jonas Bonn
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: x86@kernel.org
Cc: Chris Zankel
Cc: Max Filippov
Acked-by: Grant Likely -
Convert c6x to use new early_init_dt_scan function.
Signed-off-by: Rob Herring
Acked-by: Mark Salter
Cc: Aurelien Jacquiot
Cc: linux-c6x-dev@linux-c6x.org -
Save some pointless copying of the kernel command line and just use
boot_command_line instead.Also remove default_command_line as it is not referenced anywhere, and
the DT code already handles the default command line.Signed-off-by: Rob Herring
Tested-by: Mark Salter
Acked-by: Mark Salter
Cc: Aurelien Jacquiot
Cc: linux-c6x-dev@linux-c6x.org
Reviewed-by: Grant Likely
25 Sep, 2013
1 commit
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In order to prepare to per-arch implementations of preempt_count move
the required bits into an asm-generic header and use this for all
archs.Signed-off-by: Peter Zijlstra
Link: http://lkml.kernel.org/n/tip-h5j0c1r3e3fk015m30h8f1zx@git.kernel.org
Signed-off-by: Ingo Molnar
19 Sep, 2013
1 commit
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This patch proposes to remove the TMS320C6X_CACHES_ON kernel configuration
parameter defined in arch/c6x/Kconfig, but used nowhere
in the makefiles and source code.Signed-off-by: Michael Opdenacker
Acked by: Mark Salter
13 Sep, 2013
1 commit
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After the last architecture switched to generic hard irqs the config
options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code
for !CONFIG_GENERIC_HARDIRQS can be removed.Signed-off-by: Martin Schwidefsky
29 Aug, 2013
1 commit
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Most architectures use the same implementation. Collapse the common ones
into a single weak function that can be overridden.Signed-off-by: Grant Likely
24 Jul, 2013
1 commit
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On some PAE architectures, the entire range of physical memory could reside
outside the 32-bit limit. These systems need the ability to specify the
initrd location using 64-bit numbers.This patch globally modifies the early_init_dt_setup_initrd_arch() function to
use 64-bit numbers instead of the current unsigned long.There has been quite a bit of debate about whether to use u64 or phys_addr_t.
It was concluded to stick to u64 to be consistent with rest of the device
tree code. As summarized by Geert, "The address to load the initrd is decided
by the bootloader/user and set at that point later in time. The dtb should not
be tied to the kernel you are booting"More details on the discussion can be found here:
https://lkml.org/lkml/2013/6/20/690
https://lkml.org/lkml/2012/9/13/544Signed-off-by: Santosh Shilimkar
Acked-by: Rob Herring
Acked-by: Vineet Gupta
Acked-by: Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by: Grant Likely
04 Jul, 2013
8 commits
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Merge first patch-bomb from Andrew Morton:
- various misc bits
- I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been
distracted. There has been quite a bit of activity.
- About half the MM queue
- Some backlight bits
- Various lib/ updates
- checkpatch updates
- zillions more little rtc patches
- ptrace
- signals
- exec
- procfs
- rapidio
- nbd
- aoe
- pps
- memstick
- tools/testing/selftests updates* emailed patches from Andrew Morton : (445 commits)
tools/testing/selftests: don't assume the x bit is set on scripts
selftests: add .gitignore for kcmp
selftests: fix clean target in kcmp Makefile
selftests: add .gitignore for vm
selftests: add hugetlbfstest
self-test: fix make clean
selftests: exit 1 on failure
kernel/resource.c: remove the unneeded assignment in function __find_resource
aio: fix wrong comment in aio_complete()
drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode
drivers/memstick/host/r592.c: convert to module_pci_driver
drivers/memstick/host/jmb38x_ms: convert to module_pci_driver
pps-gpio: add device-tree binding and support
drivers/pps/clients/pps-gpio.c: convert to module_platform_driver
drivers/pps/clients/pps-gpio.c: convert to devm_* helpers
drivers/parport/share.c: use kzalloc
Documentation/accounting/getdelays.c: avoid strncpy in accounting tool
aoe: update internal version number to v83
aoe: update copyright date
aoe: perform I/O completions in parallel
... -
Prepare for removing num_physpages and simplify mem_init().
Signed-off-by: Jiang Liu
Cc: Mark Salter
Cc: Aurelien Jacquiot
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Normalize global variables exported by vmlinux.lds to conform usage
guidelines from include/asm-generic/sections.h.Use _text to mark the start of the kernel image including the head text,
and _stext to mark the start of the .text section.This patch also fixes possible bugs due to current address layout that
[__init_begin, __init_end] is a sub-range of [_stext, _etext] and pages
within range [__init_begin, __init_end] will be freed by free_initmem().Signed-off-by: Jiang Liu
Cc: Mark Salter
Cc: Aurelien Jacquiot
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Concentrate code to modify totalram_pages into the mm core, so the arch
memory initialized code doesn't need to take care of it. With these
changes applied, only following functions from mm core modify global
variable totalram_pages: free_bootmem_late(), free_all_bootmem(),
free_all_bootmem_node(), adjust_managed_page_count().With this patch applied, it will be much more easier for us to keep
totalram_pages and zone->managed_pages in consistence.Signed-off-by: Jiang Liu
Acked-by: David Howells
Cc: "H. Peter Anvin"
Cc: "Michael S. Tsirkin"
Cc:
Cc: Arnd Bergmann
Cc: Catalin Marinas
Cc: Chris Metcalf
Cc: Geert Uytterhoeven
Cc: Ingo Molnar
Cc: Jeremy Fitzhardinge
Cc: Jianguo Wu
Cc: Joonsoo Kim
Cc: Kamezawa Hiroyuki
Cc: Konrad Rzeszutek Wilk
Cc: Marek Szyprowski
Cc: Mel Gorman
Cc: Michel Lespinasse
Cc: Minchan Kim
Cc: Rik van Riel
Cc: Rusty Russell
Cc: Tang Chen
Cc: Tejun Heo
Cc: Thomas Gleixner
Cc: Wen Congyang
Cc: Will Deacon
Cc: Yasuaki Ishimatsu
Cc: Yinghai Lu
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Address more review comments from last round of code review.
1) Enhance free_reserved_area() to support poisoning freed memory with
pattern '0'. This could be used to get rid of poison_init_mem()
on ARM64.
2) A previous patch has disabled memory poison for initmem on s390
by mistake, so restore to the original behavior.
3) Remove redundant PAGE_ALIGN() when calling free_reserved_area().Signed-off-by: Jiang Liu
Cc: Geert Uytterhoeven
Cc: "H. Peter Anvin"
Cc: "Michael S. Tsirkin"
Cc:
Cc: Arnd Bergmann
Cc: Catalin Marinas
Cc: Chris Metcalf
Cc: David Howells
Cc: Ingo Molnar
Cc: Jeremy Fitzhardinge
Cc: Jianguo Wu
Cc: Joonsoo Kim
Cc: Kamezawa Hiroyuki
Cc: Konrad Rzeszutek Wilk
Cc: Marek Szyprowski
Cc: Mel Gorman
Cc: Michel Lespinasse
Cc: Minchan Kim
Cc: Rik van Riel
Cc: Rusty Russell
Cc: Tang Chen
Cc: Tejun Heo
Cc: Thomas Gleixner
Cc: Wen Congyang
Cc: Will Deacon
Cc: Yasuaki Ishimatsu
Cc: Yinghai Lu
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Change signature of free_reserved_area() according to Russell King's
suggestion to fix following build warnings:arch/arm/mm/init.c: In function 'mem_init':
arch/arm/mm/init.c:603:2: warning: passing argument 1 of 'free_reserved_area' makes integer from pointer without a cast [enabled by default]
free_reserved_area(__va(PHYS_PFN_OFFSET), swapper_pg_dir, 0, NULL);
^
In file included from include/linux/mman.h:4:0,
from arch/arm/mm/init.c:15:
include/linux/mm.h:1301:22: note: expected 'long unsigned int' but argument is of type 'void *'
extern unsigned long free_reserved_area(unsigned long start, unsigned long end,mm/page_alloc.c: In function 'free_reserved_area':
>> mm/page_alloc.c:5134:3: warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast [enabled by default]
In file included from arch/mips/include/asm/page.h:49:0,
from include/linux/mmzone.h:20,
from include/linux/gfp.h:4,
from include/linux/mm.h:8,
from mm/page_alloc.c:18:
arch/mips/include/asm/io.h:119:29: note: expected 'const volatile void *' but argument is of type 'long unsigned int'
mm/page_alloc.c: In function 'free_area_init_nodes':
mm/page_alloc.c:5030:34: warning: array subscript is below array bounds [-Warray-bounds]Also address some minor code review comments.
Signed-off-by: Jiang Liu
Reported-by: Arnd Bergmann
Cc: "H. Peter Anvin"
Cc: "Michael S. Tsirkin"
Cc:
Cc: Catalin Marinas
Cc: Chris Metcalf
Cc: David Howells
Cc: Geert Uytterhoeven
Cc: Ingo Molnar
Cc: Jeremy Fitzhardinge
Cc: Jianguo Wu
Cc: Joonsoo Kim
Cc: Kamezawa Hiroyuki
Cc: Konrad Rzeszutek Wilk
Cc: Marek Szyprowski
Cc: Mel Gorman
Cc: Michel Lespinasse
Cc: Minchan Kim
Cc: Rik van Riel
Cc: Rusty Russell
Cc: Tang Chen
Cc: Tejun Heo
Cc: Thomas Gleixner
Cc: Wen Congyang
Cc: Will Deacon
Cc: Yasuaki Ishimatsu
Cc: Yinghai Lu
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Need include "asm/uaccess.h" to pass compiling.
The related error (with allmodconfig):
arch/c6x/mm/init.c: In function `paging_init':
arch/c6x/mm/init.c:46:2: error: implicit declaration of function `set_fs' [-Werror=implicit-function-declaration]
arch/c6x/mm/init.c:46:9: error: `KERNEL_DS' undeclared (first use in this function)
arch/c6x/mm/init.c:46:9: note: each undeclared identifier is reported only once for each function it appears inSigned-off-by: Chen Gang
Cc: [3.10.x]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pull "exotic" arch fixes from Geert Uytterhoeven:
"This is a collection of several exotic architecture fixes, and a few
other fixes for issues that were detected while doing the former"* 'exotic-arch-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: (35 commits)
lib: Move fonts from drivers/video/console/ to lib/fonts/
console/font: Refactor font support code selection logic
Revert "staging/solo6x10: depend on CONFIG_FONTS"
input: cros_ec_keyb_clear_keyboard() depends on CONFIG_PM_SLEEP
score: Wire up asm-generic/xor.h
score: Remove unneeded
openrisc: Wire up asm-generic/xor.h
h8300/boot: Use POSIX "$((..))" instead of bashism "$[...]"
h8300: Mark H83002 and H83048 CPU support broken
h8300: Switch h8300 to drivers/Kconfig
h8300: Limit timer channel ranges in Kconfig
h8300: Wire up asm-generic/xor.h
h8300: Fill the system call table using a CALL() macro
h8300: Fix
h8300: Hardcode symbol prefixes in asm sources
h8300: add missing definition for read_barries_depends()
frv: head.S - Remove commented-out initialization code
cris: Wire up asm-generic/vga.h
parport: disable PC-style parallel port support on cris
console: Disable VGA text console support on cris
...
29 Jun, 2013
1 commit
-
Signed-off-by: Al Viro
16 Jun, 2013
1 commit
-
Signed-off-by: Geert Uytterhoeven
Acked-by: Mark Salter
Tested-by: Mark Salter
01 May, 2013
2 commits
-
show_regs() is inherently arch-dependent but it does make sense to print
generic debug information and some archs already do albeit in slightly
different forms. This patch introduces a generic function to print debug
information from show_regs() so that different archs print out the same
information and it's much easier to modify what's printed.show_regs_print_info() prints out the same debug info as dump_stack()
does plus task and thread_info pointers.* Archs which didn't print debug info now do.
alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
um, xtensa* Already prints debug info. Replaced with show_regs_print_info().
The printed information is superset of what used to be there.arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86
* s390 is special in that it used to print arch-specific information
along with generic debug info. Heiko and Martin think that the
arch-specific extra isn't worth keeping s390 specfic implementation.
Converted to use the generic version.Note that now all archs print the debug info before actual register
dumps.An example BUG() dump follows.
kernel BUG at /work/os/work/kernel/workqueue.c:4841!
invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
Hardware name: empty empty/S3992, BIOS 080011 10/26/2007
task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
RIP: 0010:[] [] init_workqueues+0x4/0x6
RSP: 0000:ffff88007c861ec8 EFLAGS: 00010246
RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
Call Trace:
[] do_one_initcall+0x122/0x170
[] kernel_init_freeable+0x9b/0x1c8
[] ? rest_init+0x140/0x140
[] kernel_init+0xe/0xf0
[] ret_from_fork+0x7c/0xb0
[] ? rest_init+0x140/0x140
...v2: Typo fix in x86-32.
v3: CPU number dropped from show_regs_print_info() as
dump_stack_print_info() has been updated to print it. s390
specific implementation dropped as requested by s390 maintainers.Signed-off-by: Tejun Heo
Acked-by: David S. Miller
Acked-by: Jesper Nilsson
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Bjorn Helgaas
Cc: Fengguang Wu
Cc: Mike Frysinger
Cc: Vineet Gupta
Cc: Sam Ravnborg
Acked-by: Chris Metcalf [tile bits]
Acked-by: Richard Kuo [hexagon bits]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Both dump_stack() and show_stack() are currently implemented by each
architecture. show_stack(NULL, NULL) dumps the backtrace for the
current task as does dump_stack(). On some archs, dump_stack() prints
extra information - pid, utsname and so on - in addition to the
backtrace while the two are identical on other archs.The usages in arch-independent code of the two functions indicate
show_stack(NULL, NULL) should print out bare backtrace while
dump_stack() is used for debugging purposes when something went wrong,
so it does make sense to print additional information on the task which
triggered dump_stack().There's no reason to require archs to implement two separate but mostly
identical functions. It leads to unnecessary subtle information.This patch expands the dummy fallback dump_stack() implementation in
lib/dump_stack.c such that it prints out debug information (taken from
x86) and invokes show_stack(NULL, NULL) and drops arch-specific
dump_stack() implementations in all archs except blackfin. Blackfin's
dump_stack() does something wonky that I don't understand.Debug information can be printed separately by calling
dump_stack_print_info() so that arch-specific dump_stack()
implementation can still emit the same debug information. This is used
in blackfin.This patch brings the following behavior changes.
* On some archs, an extra level in backtrace for show_stack() could be
printed. This is because the top frame was determined in
dump_stack() on those archs while generic dump_stack() can't do that
reliably. It can be compensated by inlining dump_stack() but not
sure whether that'd be necessary.* Most archs didn't use to print debug info on dump_stack(). They do
now.An example WARN dump follows.
WARNING: at kernel/workqueue.c:4841 init_workqueues+0x35/0x505()
Hardware name: empty
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #9
0000000000000009 ffff88007c861e08 ffffffff81c614dc ffff88007c861e48
ffffffff8108f50f ffffffff82228240 0000000000000040 ffffffff8234a03c
0000000000000000 0000000000000000 0000000000000000 ffff88007c861e58
Call Trace:
[] dump_stack+0x19/0x1b
[] warn_slowpath_common+0x7f/0xc0
[] warn_slowpath_null+0x1a/0x20
[] init_workqueues+0x35/0x505
...v2: CPU number added to the generic debug info as requested by s390
folks and dropped the s390 specific dump_stack(). This loses %ksp
from the debug message which the maintainers think isn't important
enough to keep the s390-specific dump_stack() implementation.dump_stack_print_info() is moved to kernel/printk.c from
lib/dump_stack.c. Because linkage is per objecct file,
dump_stack_print_info() living in the same lib file as generic
dump_stack() means that archs which implement custom dump_stack()
- at this point, only blackfin - can't use dump_stack_print_info()
as that will bring in the generic version of dump_stack() too. v1
The v1 patch broke build on blackfin due to this issue. The build
breakage was reported by Fengguang Wu.Signed-off-by: Tejun Heo
Acked-by: David S. Miller
Acked-by: Vineet Gupta
Acked-by: Jesper Nilsson
Acked-by: Vineet Gupta
Acked-by: Martin Schwidefsky [s390 bits]
Cc: Heiko Carstens
Cc: Mike Frysinger
Cc: Fengguang Wu
Cc: Bjorn Helgaas
Cc: Sam Ravnborg
Acked-by: Richard Kuo [hexagon bits]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Apr, 2013
2 commits
-
Pull SMP/hotplug changes from Ingo Molnar:
"This is a pretty large, multi-arch series unifying and generalizing
the various disjunct pieces of idle routines that architectures have
historically copied from each other and have grown in random, wildly
inconsistent and sometimes buggy directions:101 files changed, 455 insertions(+), 1328 deletions(-)
this went through a number of review and test iterations before it was
committed, it was tested on various architectures, was exposed to
linux-next for quite some time - nevertheless it might cause problems
on architectures that don't read the mailing lists and don't regularly
test linux-next.This cat herding excercise was motivated by the -rt kernel, and was
brought to you by Thomas "the Whip" Gleixner."* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
idle: Remove GENERIC_IDLE_LOOP config switch
um: Use generic idle loop
ia64: Make sure interrupts enabled when we "safe_halt()"
sparc: Use generic idle loop
idle: Remove unused ARCH_HAS_DEFAULT_IDLE
bfin: Fix typo in arch_cpu_idle()
xtensa: Use generic idle loop
x86: Use generic idle loop
unicore: Use generic idle loop
tile: Use generic idle loop
tile: Enter idle with preemption disabled
sh: Use generic idle loop
score: Use generic idle loop
s390: Use generic idle loop
powerpc: Use generic idle loop
parisc: Use generic idle loop
openrisc: Use generic idle loop
mn10300: Use generic idle loop
mips: Use generic idle loop
microblaze: Use generic idle loop
... -
Use common help functions to free reserved pages.
Signed-off-by: Jiang Liu
Cc: Mark Salter
Cc: Aurelien Jacquiot
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Apr, 2013
1 commit
-
All archs are converted over. Remove the config switch and the
fallback code.Signed-off-by: Thomas Gleixner
10 Apr, 2013
1 commit
-
arch_local_irq_save() and friends are required to act as compiler
memory barriers. This patch adds a "memory" clobber to the inline
asm code in arch_local_irq_restore() which is used as the building
block for other functions needing to set/clear the interrupt enable
in the CSR register.Signed-off-by: Mark Salter
08 Apr, 2013
1 commit
-
Signed-off-by: Thomas Gleixner
Cc: Linus Torvalds
Cc: Rusty Russell
Cc: Paul McKenney
Cc: Peter Zijlstra
Reviewed-by: Cc: Srivatsa S. Bhat
Cc: Magnus Damm
Cc: Mark Salter
Link: http://lkml.kernel.org/r/20130321215234.087033904@linutronix.de
Signed-off-by: Thomas Gleixner
27 Feb, 2013
1 commit
-
Pull vfs pile (part one) from Al Viro:
"Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
locking violations, etc.The most visible changes here are death of FS_REVAL_DOT (replaced with
"has ->d_weak_revalidate()") and a new helper getting from struct file
to inode. Some bits of preparation to xattr method interface changes.Misc patches by various people sent this cycle *and* ocfs2 fixes from
several cycles ago that should've been upstream right then.PS: the next vfs pile will be xattr stuff."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
saner proc_get_inode() calling conventions
proc: avoid extra pde_put() in proc_fill_super()
fs: change return values from -EACCES to -EPERM
fs/exec.c: make bprm_mm_init() static
ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
ocfs2: fix possible use-after-free with AIO
ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
target: writev() on single-element vector is pointless
export kernel_write(), convert open-coded instances
fs: encode_fh: return FILEID_INVALID if invalid fid_type
kill f_vfsmnt
vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
nfsd: handle vfs_getattr errors in acl protocol
switch vfs_getattr() to struct path
default SET_PERSONALITY() in linux/elf.h
ceph: prepopulate inodes only when request is aborted
d_hash_and_lookup(): export, switch open-coded instances
9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
9p: split dropping the acls from v9fs_set_create_acl()
...
26 Feb, 2013
1 commit
-
Signed-off-by: Al Viro
24 Feb, 2013
1 commit
-
Pull signal handling cleanups from Al Viro:
"This is the first pile; another one will come a bit later and will
contain SYSCALL_DEFINE-related patches.- a bunch of signal-related syscalls (both native and compat)
unified.- a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
(fixing several potential problems with missing argument
validation, while we are at it)- a lot of now-pointless wrappers killed
- a couple of architectures (cris and hexagon) forgot to save
altstack settings into sigframe, even though they used the
(uninitialized) values in sigreturn; fixed.- microblaze fixes for delivery of multiple signals arriving at once
- saner set of helpers for signal delivery introduced, several
architectures switched to using those."* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
x86: convert to ksignal
sparc: convert to ksignal
arm: switch to struct ksignal * passing
alpha: pass k_sigaction and siginfo_t using ksignal pointer
burying unused conditionals
make do_sigaltstack() static
arm64: switch to generic old sigaction() (compat-only)
arm64: switch to generic compat rt_sigaction()
arm64: switch compat to generic old sigsuspend
arm64: switch to generic compat rt_sigqueueinfo()
arm64: switch to generic compat rt_sigpending()
arm64: switch to generic compat rt_sigprocmask()
arm64: switch to generic sigaltstack
sparc: switch to generic old sigsuspend
sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
sparc: kill sign-extending wrappers for native syscalls
kill sparc32_open()
sparc: switch to use of generic old sigaction
sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
mips: switch to generic sys_fork() and sys_clone()
...