26 Jan, 2011
1 commit
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The -rt patches change the console_semaphore to console_mutex. As a
result, a quite large chunk of the patches changes all
acquire/release_console_sem() to acquire/release_console_mutex()This commit makes things use more neutral function names which dont make
implications about the underlying lock.The only real change is the return value of console_trylock which is
inverted from try_acquire_console_sem()This patch also paves the way to switching console_sem from a semaphore to
a mutex.[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: make console_trylock return 1 on success, per Geert]
Signed-off-by: Torben Hohn
Cc: Thomas Gleixner
Cc: Greg KH
Cc: Ingo Molnar
Cc: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Jan, 2011
3 commits
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No functional change.
Signed-off-by: Thomas Gleixner
Cc: Kyle McMartin
Acked-by: James Bottomley -
All architectures are finally converted. Remove the cruft.
Signed-off-by: Thomas Gleixner
Cc: Richard Henderson
Cc: Mike Frysinger
Cc: David Howells
Cc: Tony Luck
Cc: Greg Ungerer
Cc: Michal Simek
Acked-by: David Howells
Cc: Kyle McMartin
Acked-by: Benjamin Herrenschmidt
Cc: Chen Liqin
Cc: "David S. Miller"
Cc: Chris Metcalf
Cc: Jeff Dike -
The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel. A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.Reviewed-by: Ingo Molnar
Acked-by: David Woodhouse
Signed-off-by: David Rientjes
Cc: Greg KH
Cc: "David S. Miller"
Cc: Jens Axboe
Cc: Arnd Bergmann
Cc: Robin Holt
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Jan, 2011
2 commits
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on Parisc, we have an include of linux/mm.h inside our asm/pgtable.h, so
this patchcommit 14fd403f2146f740942d78af4e0ee59396ad8eab
Author: Andrea Arcangeli
Date: Thu Jan 13 15:46:37 2011 -0800thp: export maybe_mkwrite
Causes us an unsatisfiable use of pte_mkwrite in linux/mm.h
The fix is obviously not to include linux/mm.h in our pgtable.h, which
unbreaks the build.Signed-off-by: James Bottomley
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Remove the broken line wrapping handling in pdc_iodc_print().
It is broken in 3 ways :
- It doesn't keep track of the current screen position, it just
assumes that the new buffer will be printed at the begining of the
screen.
- It doesn't take in account that non printable characters won't
increase the current position on the screen.
- And last but not least, it triggers a kernel panic if a backspace
is the first char in the provided buffer :Backtrace:
[] pdc_console_write+0x44/0x78
[] pdc_console_tty_write+0x20/0x38
[] n_tty_write+0x2a4/0x550
[] tty_write+0x1e0/0x2d8
[] vfs_write+0xb8/0x188
[] sys_write+0x68/0xb8
[] syscall_exit+0x0/0x14Most terminals handle the line wrapping just fine. I've confirmed that
it works correctly on a C8000 with both vga and serial output.Signed-off-by: Guy Martin
Cc: Stable Tree
Signed-off-by: James Bottomley
14 Jan, 2011
2 commits
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Define MADV_NOHUGEPAGE.
Signed-off-by: Andrea Arcangeli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Define MADV_HUGEPAGE.
Signed-off-by: Andrea Arcangeli
Acked-by: Rik van Riel
Acked-by: Arnd Bergmann
Acked-by: Mel Gorman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Jan, 2011
1 commit
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* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (36 commits)
serial: apbuart: Fixup apbuart_console_init()
TTY: Add tty ioctl to figure device node of the system console.
tty: add 'active' sysfs attribute to tty0 and console device
drivers: serial: apbuart: Handle OF failures gracefully
Serial: Avoid unbalanced IRQ wake disable during resume
tty: fix typos/errors in tty_driver.h comments
pch_uart : fix warnings for 64bit compile
8250: fix uninitialized FIFOs
ip2: fix compiler warning on ip2main_pci_tbl
specialix: fix compiler warning on specialix_pci_tbl
rocket: fix compiler warning on rocket_pci_ids
8250: add a UPIO_DWAPB32 for 32 bit accesses
8250: use container_of() instead of casting
serial: omap-serial: Add support for kernel debugger
serial: fix pch_uart kconfig & build
drivers: char: hvc: add arm JTAG DCC console support
RS485 documentation: add 16C950 UART description
serial: ifx6x60: fix memory leak
serial: ifx6x60: free IRQ on error
Serial: EG20T: add PCH_UART driver
...Fixed up conflicts in drivers/serial/apbuart.c with evil merge that
makes the code look fairly sane (unlike either side).
17 Dec, 2010
1 commit
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This has been in the SuSE kernels for a very long time.
Signed-off-by: Werner Fink
Signed-off-by: Greg Kroah-Hartman
05 Dec, 2010
2 commits
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The generic conversion eliminates the spurious no_ack and no_end
routines, converts all the cascaded handlers to handle_simple_irq() and
makes iosapic use a modified handle_percpu_irq() to become the same as
the CPU irq's. This isn't an essential change, but it eliminates the
mask/unmask overhead of handle_level_irq().Signed-off-by: James Bottomley
Tested-by: Helge Deller
Signed-off-by: Kyle McMartin -
The essential problem we're currently having is that dino (and gsc) is a
cascaded CPU interrupt. Under the old __do_IRQ() handler, our CPU
interrupts basically did an ack followed by an end. In the new scheme,
we replaced them with level handlers which do a mask, an ack and then an
unmask (but no end). Instead, with the renaming of end to eoi, we
actually want to call the percpu flow handlers, because they actually
have all the characteristics we want.This patch does the conversion and gets my C360 booting again.
Signed-off-by: James Bottomley
Signed-off-by: Kyle McMartin
30 Nov, 2010
1 commit
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Noticed-by: Randy Dunlap
Signed-off-by: Kyle McMartin
18 Nov, 2010
1 commit
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The big kernel lock has been removed from all these files at some point,
leaving only the #include.Remove this too as a cleanup.
Signed-off-by: Arnd Bergmann
Signed-off-by: Linus Torvalds
17 Nov, 2010
1 commit
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* use newly added for_each_console for iterating consoles
* add proper console locking
* do not initialize tmp twice
* no need to declare console_drivers, it's already done in console.hSigned-off-by: Jiri Slaby
Acked-by: Kyle McMartin
Cc: Helge Deller
Cc: "James E.J. Bottomley"
Cc: linux-parisc@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman
29 Oct, 2010
3 commits
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* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (38 commits)
kbuild: convert `arch/tile' to the kconfig mainmenu upgrade
README: cite nconfig
Revert "kconfig: Temporarily disable dependency warnings"
kconfig: Use PATH_MAX instead of 128 for path buffer sizes.
kconfig: Fix realloc usage()
kconfig: Propagate const
kconfig: Don't go out from read config loop when you read new symbol
kconfig: fix menuconfig on debian lenny
kbuild: migrate all arch to the kconfig mainmenu upgrade
kconfig: expand file names
kconfig: use the file's name of sourced file
kconfig: constify file name
kconfig: don't emit warning upon rootmenu's prompt redefinition
kconfig: replace KERNELVERSION usage by the mainmenu's prompt
kconfig: delay gconf window initialization
kconfig: expand by default the rootmenu's prompt
kconfig: add a symbol string expansion helper
kconfig: regen parser
kconfig: implement the `mainmenu' directive
kconfig: allow PACKAGE to be defined on the compiler's command-line
...Fix up trivial conflict in arch/mn10300/Kconfig
-
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
parisc: add tty driver to PDC console
drivers/parisc/iosapic.c: Remove unnecessary kzalloc cast
parisc: remove homegrown L1_CACHE_ALIGN macro
arch/parisc: Removing undead ifdef CONFIG_PA20
parisc: unwind - optimise linked-list searches for modules
parisc: change to new flag variable
drivers/char/agp/parisc-agp.c: eliminate memory leak
parisc: kill __do_IRQ
parisc: convert eisa interrupts to flow handlers
parisc: convert gsc and dino pci interrupts to flow handlers
parisc: convert suckyio interrupts to flow handlers
parisc: convert iosapic interrupts to proper flow handlers
parisc: convert cpu interrupts to proper flow handlers
parisc: lay groundwork for killing __do_IRQ
parisc: add prlimit64 syscall
parisc: squelch warning when using dev_get_stats -
Commit 3e4d3af501cc ("mm: stack based kmap_atomic()") overlooked the
fact that parisc uses kmap as a coherence mechanism, so even though we
have no highmem, we do need to supply our own versions of kmap (and
atomic). This patch converts the parisc kmap to the form which is
needed to keep it compiling (it's a simple prototype and name change).Signed-off-by: James Bottomley
Acked-by: Kyle McMartin
Signed-off-by: Linus Torvalds
28 Oct, 2010
2 commits
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Add missing __user markup on the argument of put_user().
Signed-off-by: Namhyung Kim
Cc: Kyle McMartin
Cc: Helge Deller
Cc: "James E.J. Bottomley"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix up the arguments to arch_ptrace() to take account of the fact that
@addr and @data are now unsigned long rather than long as of a preceding
patch in this series.Signed-off-by: Namhyung Kim
Cc:
Acked-by: Roland McGrath
Acked-by: David Howells
Acked-by: Geert Uytterhoeven
Acked-by: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Oct, 2010
1 commit
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Since we no longer need to provide KM_type, the whole pte_*map_nested()
API is now redundant, remove it.Signed-off-by: Peter Zijlstra
Acked-by: Chris Metcalf
Cc: David Howells
Cc: Hugh Dickins
Cc: Rik van Riel
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Steven Rostedt
Cc: Russell King
Cc: Ralf Baechle
Cc: David Miller
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Oct, 2010
1 commit
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* 'config' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl:
BKL: introduce CONFIG_BKL.
dabusb: remove the BKL
sunrpc: remove the big kernel lock
init/main.c: remove BKL notations
blktrace: remove the big kernel lock
rtmutex-tester: make it build without BKL
dvb-core: kill the big kernel lock
dvb/bt8xx: kill the big kernel lock
tlclk: remove big kernel lock
fix rawctl compat ioctls breakage on amd64 and itanic
uml: kill big kernel lock
parisc: remove big kernel lock
cris: autoconvert trivial BKL users
alpha: kill big kernel lock
isapnp: BKL removal
s390/block: kill the big kernel lock
hpet: kill BKL, add compat_ioctl
22 Oct, 2010
6 commits
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This patch adds a tty driver to the PDC console. It allows the use
of ports not supported by linux as a console (e.g. serial port on
C8000.) The tty driver will not register the ttyB device if PDC console
driver has been unregistered. This happens when the early printk
console is disabled as it has not been selected as the primary console.Signed-off-by: Guy Martin
Signed-off-by: Kyle McMartin -
Let's use the standard L1_CACHE_ALIGN macro instead.
Signed-off-by: FUJITA Tomonori
Signed-off-by: Kyle McMartin -
The CONFIG_PA20 ifdef isn't necessary at this point, because it is
checked in an outer ifdef level already and has no effect here.Signed-off-by: Christian Dietrich
Signed-off-by: Kyle McMartin -
Having many dozens of modules, the searches down the linked
list of sections would dominate the lookup time, dwarfing
any savings from the binary search within the section.A simple move-to-front optimisation exploits the commonality
of the code paths taken, and in simple real-world tests
on other architectures reduced the number of steps in the
search to barely more than 1.Signed-off-by: Phil Carmody
Signed-off-by: Kyle McMartin -
Replace EXTRA_CFLAGS with ccflags-y.
Signed-off-by: matt mooney
Signed-off-by: Kyle McMartin -
* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-irqflags:
Fix IRQ flag handling naming
MIPS: Add missing #inclusions of
smc91x: Add missing #inclusion of
Drop a couple of unnecessary asm/system.h inclusions
SH: Add missing consts to sys_execve() declaration
Blackfin: Rename IRQ flags handling functions
Blackfin: Add missing dep to asm/irqflags.h
Blackfin: Rename DES PC2() symbol to avoid collision
Blackfin: Split the BF532 BFIN_*_FIO_FLAG() functions to their own header
Blackfin: Split PLL code from mach-specific cdef headers
19 Oct, 2010
1 commit
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Provide a mechanism that allows running code in IRQ context. It is
most useful for NMI code that needs to interact with the rest of the
system -- like wakeup a task to drain buffers.Perf currently has such a mechanism, so extract that and provide it as
a generic feature, independent of perf so that others may also
benefit.The IRQ context callback is generated through self-IPIs where
possible, or on architectures like powerpc the decrementer (the
built-in timer facility) is set to generate an interrupt immediately.Architectures that don't have anything like this get to do with a
callback from the timer tick. These architectures can call
irq_work_run() at the tail of any IRQ handlers that might enqueue such
work (like the perf IRQ handler) to avoid undue latencies in
processing the work.Signed-off-by: Peter Zijlstra
Acked-by: Kyle McMartin
Acked-by: Martin Schwidefsky
[ various fixes ]
Signed-off-by: Huang Ying
LKML-Reference:
Signed-off-by: Ingo Molnar
17 Oct, 2010
1 commit
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The parisc version of the perf code is sufficiently
protected by its own spinlock, no need to use the BKL.Signed-off-by: Arnd Bergmann
Cc: Kyle McMartin
Cc: Helge Deller
Cc: "James E.J. Bottomley"
Cc: linux-parisc@vger.kernel.org
14 Oct, 2010
5 commits
-
Signed-off-by: Kyle McMartin
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Shift the ->end call (cpu eoi) from __do_IRQ into our
unmask handler. Also nuke some redundant code.Signed-off-by: Kyle McMartin
-
Only major change is renaming functions to match the conventions
expected by the generic irq code.Signed-off-by: Kyle McMartin
-
Use proper accessors and handlers for generic irq cleanups. We just
call back into __do_IRQ through desc->handler now, and remove the
explicit calls.Signed-off-by: Kyle McMartin
-
Signed-off-by: Kyle McMartin
12 Oct, 2010
1 commit
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We need to revert the temporary hack in 71ebc01, hence the merge.
07 Oct, 2010
1 commit
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Fix the IRQ flag handling naming. In linux/irqflags.h under one configuration,
it maps:local_irq_enable() -> raw_local_irq_enable()
local_irq_disable() -> raw_local_irq_disable()
local_irq_save() -> raw_local_irq_save()
...and under the other configuration, it maps:
raw_local_irq_enable() -> local_irq_enable()
raw_local_irq_disable() -> local_irq_disable()
raw_local_irq_save() -> local_irq_save()
...This is quite confusing. There should be one set of names expected of the
arch, and this should be wrapped to give another set of names that are expected
by users of this facility.Change this to have the arch provide:
flags = arch_local_save_flags()
flags = arch_local_irq_save()
arch_local_irq_restore(flags)
arch_local_irq_disable()
arch_local_irq_enable()
arch_irqs_disabled_flags(flags)
arch_irqs_disabled()
arch_safe_halt()Then linux/irqflags.h wraps these to provide:
raw_local_save_flags(flags)
raw_local_irq_save(flags)
raw_local_irq_restore(flags)
raw_local_irq_disable()
raw_local_irq_enable()
raw_irqs_disabled_flags(flags)
raw_irqs_disabled()
raw_safe_halt()with type checking on the flags 'arguments', and then wraps those to provide:
local_save_flags(flags)
local_irq_save(flags)
local_irq_restore(flags)
local_irq_disable()
local_irq_enable()
irqs_disabled_flags(flags)
irqs_disabled()
safe_halt()with tracing included if enabled.
The arch functions can now all be inline functions rather than some of them
having to be macros.Signed-off-by: David Howells [X86, FRV, MN10300]
Signed-off-by: Chris Metcalf [Tile]
Signed-off-by: Michal Simek [Microblaze]
Tested-by: Catalin Marinas [ARM]
Acked-by: Thomas Gleixner
Acked-by: Haavard Skinnemoen [AVR]
Acked-by: Tony Luck [IA-64]
Acked-by: Hirokazu Takata [M32R]
Acked-by: Greg Ungerer [M68K/M68KNOMMU]
Acked-by: Ralf Baechle [MIPS]
Acked-by: Kyle McMartin [PA-RISC]
Acked-by: Paul Mackerras [PowerPC]
Acked-by: Martin Schwidefsky [S390]
Acked-by: Chen Liqin [Score]
Acked-by: Matt Fleming [SH]
Acked-by: David S. Miller [Sparc]
Acked-by: Chris Zankel [Xtensa]
Reviewed-by: Richard Henderson [Alpha]
Reviewed-by: Yoshinori Sato [H8300]
Cc: starvik@axis.com [CRIS]
Cc: jesper.nilsson@axis.com [CRIS]
Cc: linux-cris-kernel@axis.com
06 Oct, 2010
1 commit
-
With all the recent module loading cleanups, we've minimized the code
that sits under module_mutex, fixing various deadlocks and making it
possible to do most of the module loading in parallel.However, that whole conversion totally missed the rather obscure code
that adds a new module to the list for BUG() handling. That code was
doubly obscure because (a) the code itself lives in lib/bugs.c (for
dubious reasons) and (b) it gets called from the architecture-specific
"module_finalize()" rather than from generic code.Calling it from arch-specific code makes no sense what-so-ever to begin
with, and is now actively wrong since that code isn't protected by the
module loading lock any more.So this commit moves the "module_bug_{finalize,cleanup}()" calls away
from the arch-specific code, and into the generic code - and in the
process protects it with the module_mutex so that the list operations
are now safe.Future fixups:
- move the module list handling code into kernel/module.c where it
belongs.
- get rid of 'module_bug_list' and just use the regular list of modules
(called 'modules' - imagine that) that we already create and maintain
for other reasons.Reported-and-tested-by: Thomas Gleixner
Cc: Rusty Russell
Cc: Adrian Bunk
Cc: Andrew Morton
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds
20 Sep, 2010
1 commit
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Signed-off-by: Arnaud Lacombe
Reviewed-by: Sam Ravnborg
Reviewed-by: Michal Marek
15 Sep, 2010
1 commit
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compat_alloc_user_space() expects the caller to independently call
access_ok() to verify the returned area. A missing call could
introduce problems on some architectures.This patch incorporates the access_ok() check into
compat_alloc_user_space() and also adds a sanity check on the length.
The existing compat_alloc_user_space() implementations are renamed
arch_compat_alloc_user_space() and are used as part of the
implementation of the new global function.This patch assumes NULL will cause __get_user()/__put_user() to either
fail or access userspace on all architectures. This should be
followed by checking the return value of compat_access_user_space()
for NULL in the callers, at which time the access_ok() in the callers
can also be removed.Reported-by: Ben Hawkes
Signed-off-by: H. Peter Anvin
Acked-by: Benjamin Herrenschmidt
Acked-by: Chris Metcalf
Acked-by: David S. Miller
Acked-by: Ingo Molnar
Acked-by: Thomas Gleixner
Acked-by: Tony Luck
Cc: Andrew Morton
Cc: Arnd Bergmann
Cc: Fenghua Yu
Cc: H. Peter Anvin
Cc: Heiko Carstens
Cc: Helge Deller
Cc: James Bottomley
Cc: Kyle McMartin
Cc: Martin Schwidefsky
Cc: Paul Mackerras
Cc: Ralf Baechle
Cc:
