24 Sep, 2009
6 commits
-
* 'sfi-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-sfi-2.6:
SFI: remove unneeded includes
sfi: Remove unused code
SFI: Hook PCI MMCONFIG
x86: add arch-specific SFI support
SFI: add capability to parse ACPI tables
SFI: add platform-independent core support
SFI: create linux/sfi.h
SFI: Simple Firmware Interface - MAINTAINERS, Kconfig -
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (119 commits)
ACPI: don't pass handle for fixed hardware notifications
ACPI: remove null pointer checks in deferred execution path
ACPI: simplify deferred execution path
acerhdf: additional BIOS versions
acerhdf: convert to dev_pm_ops
acerhdf: fix fan control for AOA150 model
thermal: add missing Kconfig dependency
acpi: switch /proc/acpi/{debug_layer,debug_level} to seq_file
hp-wmi: fix rfkill memory leak on unload
ACPI: remove unnecessary #ifdef CONFIG_DMI
ACPI: linux/acpi.h should not include linux/dmi.h
hwmon driver for ACPI 4.0 power meters
topstar-laptop: add new driver for hotkeys support on Topstar N01
thinkpad_acpi: fix rfkill memory leak on unload
thinkpad-acpi: report brightness events when required
thinkpad-acpi: don't poll by default any of the reserved hotkeys
thinkpad-acpi: Fix procfs hotkey reset command
thinkpad-acpi: deprecate hotkey_bios_mask
thinkpad-acpi: hotkey poll fixes
thinkpad-acpi: be more strict when detecting a ThinkPad
... -
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c: Clearly mark ACPI drivers as such
i2c: Add driver for SMBus Control Method Interface
i2c-pnx: Correct use of request_region/request_mem_region
MAINTAINERS: Add maintainer for AT24 and PCA9564/PCA9665
i2c-piix4: Add AMD SB900 SMBus device ID
i2c/chips: Remove deprecated pcf8574 driver
i2c/chips: Remove deprecated pca9539 driver
i2c/chips: Remove deprecated pcf8575 driver
gpio/pcf857x: Copy i2c_device_id from old pcf8574 driver
i2c/scx200_acb: Provide more information on bus errors
i2c: Provide compatibility links for i2c adapters
i2c: Convert i2c adapters to bus devices
i2c: Convert i2c clients to a device type
i2c/tsl2550: Use combined SMBus transactions
i2c-taos-evm: Switch echo off to improve performance
i2c: Drop unused i2c_driver.id field -
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (142 commits)
USB: Fix sysfs paths in documentation
USB: skeleton: fix coding style issues.
USB: O_NONBLOCK in read path of skeleton
USB: make usb-skeleton honor O_NONBLOCK in write path
USB: skel_read really sucks royally
USB: Add hub descriptor update hook for xHCI
USB: xhci: Support USB hubs.
USB: xhci: Set multi-TT field for LS/FS devices under hubs.
USB: xhci: Set route string for all devices.
USB: xhci: Fix command wait list handling.
USB: xhci: Change how xHCI commands are handled.
USB: xhci: Refactor input device context setup.
USB: xhci: Endpoint representation refactoring.
USB: gadget: ether needs to select CRC32
USB: fix USBTMC get_capabilities success handling
USB: fix missing error check in probing
USB: usbfs: add USBDEVFS_URB_BULK_CONTINUATION flag
USB: support for autosuspend in sierra while online
USB: ehci-dbgp,ehci: Allow dbpg to work with suspend/resume
USB: ehci-dbgp,documentation: Documentation updates for ehci-dbgp
... -
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
lguest: don't force VIRTIO_F_NOTIFY_ON_EMPTY
lguest: cleanup for map_switcher()
lguest: use PGDIR_SHIFT for PAE code to allow different PAGE_OFFSET
lguest: use set_pte/set_pmd uniformly for real page table entries
lguest: move panic notifier registration to its expected place.
virtio_blk: add support for cache flush
virtio: add virtio IDs file
virtio: get rid of redundant VIRTIO_ID_9P definition
virtio: make add_buf return capacity remaining
virtio_pci: minor MSI-X cleanups -
For this system call user space passes a signed long length parameter,
while the kernel side takes an unsigned long parameter and converts it
later to signed long again.This has led to bugs in compat wrappers see e.g. dd90bbd5 "powerpc: Add
compat_sys_truncate". The s390 compat wrapper for this functions is
broken as well since it also performs zero extension instead of sign
extension for the length parameter.In addition if hpa comes up with an automated way of generating
compat wrappers it would generate a wrong one here.So change the length parameter from unsigned long to long.
Cc: "H. Peter Anvin"
Cc: Al Viro
Cc: Christoph Hellwig
Signed-off-by: Heiko Carstens
Signed-off-by: Linus Torvalds
23 Sep, 2009
34 commits
-
bitfields should be unsigned.
This fixes sparse noise:
error: dubious one-bit signed bitfieldSigned-off-by: H Hartley Sweeten
Cc: Jan Kara
Cc: Theodore Ts'o
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cc: Eric Miao
Cc: Russell King
Cc: David Brownell
Cc: Samuel Ortiz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A GPIO driver for the Freescale MC33880 High/Low side switch
Signed-off-by: Richard Röjfors
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 926b663ce8215ba448960e1ff6e58b67a2c3b99b (gpiolib: allow GPIOs to
be named) already provides naming on the chip level. This patch provides
more flexibility by allowing multiple names where ever in sysfs on a per
GPIO basis.Adapted from David Brownell's comments on a similar concept:
http://lkml.org/lkml/2009/4/20/203.[randy.dunlap@oracle.com: fix build for CONFIG_GENERIC_GPIO=n]
Signed-off-by: Jani Nikula
Acked-by: David Brownell
Cc: Daniel Silverstone
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Support two new half-duplex SPI implementation restrictions, for links
that talk to TX-only or RX-only devices. (Existing half-duplex flavors
support both transfer directions, just not at the same time.)Move spi_async() into the spi.c core, and stop inlining it. Then make
that function perform error checks and reject messages that demand more
than the underlying controller can support.Based on a patch from Marek Szyprowski which did this only for the
bitbanged GPIO driver.Cc: Marek Szyprowski
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This makes it consistent with other buses (platform, i2c, vio, ...). I'm
not sure why we use the prefixes, but there must be a reason.This was easy enough to do it, and I did it.
Signed-off-by: Anton Vorontsov
Cc: David Brownell
Cc: David Woodhouse
Cc: Grant Likely
Cc: Jean Delvare
Cc: Ben Dooks
Cc: Benjamin Herrenschmidt
Cc: Dmitry Torokhov
Cc: Samuel Ortiz
Cc: "John W. Linville"
Acked-by: Mike Frysinger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
With this patch spi drivers can use standard spi_driver.id_table and
MODULE_DEVICE_TABLE() mechanisms to bind against the devices. Just like
we do with I2C drivers.This is useful when a single driver supports several variants of devices
but it is not possible to detect them in run-time (like non-JEDEC chips
probing in drivers/mtd/devices/m25p80.c), and when platform_data usage is
overkill.This patch also makes life a lot easier on OpenFirmware platforms, since
with OF we extensively use proper device IDs in modaliases.Signed-off-by: Anton Vorontsov
Cc: David Brownell
Cc: David Woodhouse
Cc: Grant Likely
Cc: Jean Delvare
Cc: Ben Dooks
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add missing kernel-doc notation in spi.h for struct spi_master:
Warning(include/linux/spi/spi.h:289): No description found for parameter 'mode_bits'
Warning(include/linux/spi/spi.h:289): No description found for parameter 'flags'Signed-off-by: Randy Dunlap
Acked-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
initramfs userspace likes to use this magic number.
Cc: Hugh Dickins
Signed-off-by: maximilian attems
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Some archs define MODULED_VADDR/MODULES_END which is not in VMALLOC area.
This is handled only in x86-64. This patch make it more generic. And we
can use vread/vwrite to access the area. Fix it.Signed-off-by: KAMEZAWA Hiroyuki
Cc: Jiri Slaby
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Benjamin Herrenschmidt pointed out that vmemmap
range is not included in KCORE_RAM, KCORE_VMALLOC ....This adds KCORE_VMEMMAP if SPARSEMEM_VMEMMAP is used. By this, vmemmap
can be readable via /proc/kcoreBecause it's not vmalloc area, vread/vwrite cannot be used. But the range
is static against the memory layout, this patch handles vmemmap area by
the same scheme with physical memory.This patch assumes SPARSEMEM_VMEMMAP range is not in VMALLOC range. It's
correct now.[akpm@linux-foundation.org: fix typo]
Signed-off-by: KAMEZAWA Hiroyuki
Cc: Jiri Slaby
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: WANG Cong
Cc: Benjamin Herrenschmidt
Cc: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Originally, walk_memory_resource() was introduced to traverse all memory
of "System RAM" for detecting memory hotplug/unplug range. For doing so,
flags of IORESOUCE_MEM|IORESOURCE_BUSY was used and this was enough for
memory hotplug.But for using other purpose, /proc/kcore, this may includes some firmware
area marked as IORESOURCE_BUSY | IORESOUCE_MEM. This patch makes the
check strict to find out busy "System RAM".Note: PPC64 keeps their own walk_memory_resouce(), which walk through
ppc64's lmb informaton. Because old kclist_add() is called per lmb, this
patch makes no difference in behavior, finally.And this patch removes CONFIG_MEMORY_HOTPLUG check from this function.
Because pfn_valid() just show "there is memmap or not* and cannot be used
for "there is physical memory or not", this function is useful in generic
to scan physical memory range.Signed-off-by: KAMEZAWA Hiroyuki
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: WANG Cong
Cc: Américo Wang
Cc: David Rientjes
Cc: Roland Dreier
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Presently, kclist_add() only eats start address and size as its arguments.
Considering to make kclist dynamically reconfigulable, it's necessary to
know which kclists are for System RAM and which are not.This patch add kclist types as
KCORE_RAM
KCORE_VMALLOC
KCORE_TEXT
KCORE_OTHERThis "type" is used in a patch following this for detecting KCORE_RAM.
Signed-off-by: KAMEZAWA Hiroyuki
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patchset is for /proc/kcore. With this,
- many per-arch hooks are removed.
- /proc/kcore will know really valid physical memory area.
- /proc/kcore will be aware of memory hotplug.
- /proc/kcore will be architecture independent i.e.
if an arch supports CONFIG_MMU, it can use /proc/kcore.
(if the arch uses usual memory layout.)This patch:
/proc/kcore uses its own list handling codes. It's better to use
generic list codes.No changes in logic. just clean up.
Signed-off-by: KAMEZAWA Hiroyuki
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A patch to give a better overview of the userland application stack usage,
especially for embedded linux.Currently you are only able to dump the main process/thread stack usage
which is showed in /proc/pid/status by the "VmStk" Value. But you get no
information about the consumed stack memory of the the threads.There is an enhancement in the /proc//{task/*,}/*maps and which marks
the vm mapping where the thread stack pointer reside with "[thread stack
xxxxxxxx]". xxxxxxxx is the maximum size of stack. This is a value
information, because libpthread doesn't set the start of the stack to the
top of the mapped area, depending of the pthread usage.A sample output of /proc//task//maps looks like:
08048000-08049000 r-xp 00000000 03:00 8312 /opt/z
08049000-0804a000 rw-p 00001000 03:00 8312 /opt/z
0804a000-0806b000 rw-p 00000000 00:00 0 [heap]
a7d12000-a7d13000 ---p 00000000 00:00 0
a7d13000-a7f13000 rw-p 00000000 00:00 0 [thread stack: 001ff4b4]
a7f13000-a7f14000 ---p 00000000 00:00 0
a7f14000-a7f36000 rw-p 00000000 00:00 0
a7f36000-a8069000 r-xp 00000000 03:00 4222 /lib/libc.so.6
a8069000-a806b000 r--p 00133000 03:00 4222 /lib/libc.so.6
a806b000-a806c000 rw-p 00135000 03:00 4222 /lib/libc.so.6
a806c000-a806f000 rw-p 00000000 00:00 0
a806f000-a8083000 r-xp 00000000 03:00 14462 /lib/libpthread.so.0
a8083000-a8084000 r--p 00013000 03:00 14462 /lib/libpthread.so.0
a8084000-a8085000 rw-p 00014000 03:00 14462 /lib/libpthread.so.0
a8085000-a8088000 rw-p 00000000 00:00 0
a8088000-a80a4000 r-xp 00000000 03:00 8317 /lib/ld-linux.so.2
a80a4000-a80a5000 r--p 0001b000 03:00 8317 /lib/ld-linux.so.2
a80a5000-a80a6000 rw-p 0001c000 03:00 8317 /lib/ld-linux.so.2
afaf5000-afb0a000 rw-p 00000000 00:00 0 [stack]
ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]Also there is a new entry "stack usage" in /proc//{task/*,}/status
which will you give the current stack usage in kb.A sample output of /proc/self/status looks like:
Name: cat
State: R (running)
Tgid: 507
Pid: 507
.
.
.
CapBnd: fffffffffffffeff
voluntary_ctxt_switches: 0
nonvoluntary_ctxt_switches: 0
Stack usage: 12 kBI also fixed stack base address in /proc//{task/*,}/stat to the base
address of the associated thread stack and not the one of the main
process. This makes more sense.[akpm@linux-foundation.org: fs/proc/array.c now needs walk_page_range()]
Signed-off-by: Stefani Seibold
Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: Alexey Dobriyan
Cc: "Eric W. Biederman"
Cc: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Especially with the PM framework, those are quite handy to have in driver
code too.Signed-off-by: Nicolas Pitre
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Normally writes to SDIO function 0 outside the vendor specific CCCR
registers are prohibited.To support embedded devices that require writes to SDIO function 0 outside
this range (e.g. TI WL127x embedded sdio wifi device),
MMC_QUIRK_LENIENT_FN0 is introduced.A card quirks field is added to `struct mmc_card' to support non-standard
devices (e.g. embedded sdio devices).[akpm@linux-foundation.org: code in C, not cpp!]
Signed-off-by: Ohad Ben-Cohen
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add support to disconnect the pull-up resistor on CD/DAT[3] (pin 1)
of the card. This may be desired on certain setups of boards,
controllers and embedded sdio devices which do not need the card's
pull-up. As a result, card detection is disabled and power is saved.[akpm@linux-foundation.org: simplify sdio_disable_cd() a bit]
Signed-off-by: Ohad Ben-Cohen
Acked-by: Matt Fleming
Cc: Ian Molton
Cc: "Roberto A. Foglietta"
Cc: Philip Langdale
Cc: Pierre Ossman
Cc: David Vrabel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
According to the standard, the SWITCH command should be followed by a
SEND_STATUS command to check for errors.Signed-off-by: Adrian Hunter
Acked-by: Matt Fleming
Cc: Ian Molton
Cc: "Roberto A. Foglietta"
Cc: Jarkko Lavinen
Cc: Denis Karpov
Cc: Pierre Ossman
Cc: Philip Langdale
Cc: "Madhusudhan"
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add support for the new MMC command SLEEP_AWAKE.
Signed-off-by: Jarkko Lavinen
Signed-off-by: Adrian Hunter
Acked-by: Matt Fleming
Cc: Ian Molton
Cc: "Roberto A. Foglietta"
Cc: Jarkko Lavinen
Cc: Denis Karpov
Cc: Pierre Ossman
Cc: Philip Langdale
Cc: "Madhusudhan"
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Power can be saved by powering off cards that are not in use. This is
similar to suspend / resume except it is under the control of the driver,
and does not require any power management support. It can only be used
when the driver can monitor whether the card is removed, otherwise it is
unsafe. This is possible because, unlike suspend, the driver still
receives card detect and / or cover switch interrupts.Signed-off-by: Adrian Hunter
Acked-by: Matt Fleming
Cc: Ian Molton
Cc: "Roberto A. Foglietta"
Cc: Jarkko Lavinen
Cc: Denis Karpov
Cc: Pierre Ossman
Cc: Philip Langdale
Cc: "Madhusudhan"
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
eMMC's are not removable, so unsafe resume is OK always.
To permit this a new host capability MMC_CAP_NONREMOVABLE has been added
and suspend / resume updated accordingly.Signed-off-by: Adrian Hunter
Acked-by: Matt Fleming
Cc: Ian Molton
Cc: "Roberto A. Foglietta"
Cc: Jarkko Lavinen
Cc: Denis Karpov
Cc: Pierre Ossman
Cc: Philip Langdale
Cc: "Madhusudhan"
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This change allows the MMC host to be claimed in situations where the host
may or may not have already been claimed. Also 'mmc_try_claim_host()' is
now exported.Signed-off-by: Adrian Hunter
Acked-by: Matt Fleming
Cc: Ian Molton
Cc: "Roberto A. Foglietta"
Cc: Jarkko Lavinen
Cc: Denis Karpov
Cc: Pierre Ossman
Cc: Philip Langdale
Cc: "Madhusudhan"
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
MMC hosts that support power saving can use the 'enable' and 'disable'
methods to exit and enter power saving states. An explanation of their
use is provided in the comments added to include/linux/mmc/host.h.Signed-off-by: Adrian Hunter
Acked-by: Matt Fleming
Cc: Ian Molton
Cc: "Roberto A. Foglietta"
Cc: Jarkko Lavinen
Cc: Denis Karpov
Cc: Pierre Ossman
Cc: Philip Langdale
Cc: "Madhusudhan"
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make ->ru_maxrss value in struct rusage filled accordingly to rss hiwater
mark. This struct is filled as a parameter to getrusage syscall.
->ru_maxrss value is set to KBs which is the way it is done in BSD
systems. /usr/bin/time (gnu time) application converts ->ru_maxrss to KBs
which seems to be incorrect behavior. Maintainer of this util was
notified by me with the patch which corrects it and cc'ed.To make this happen we extend struct signal_struct by two fields. The
first one is ->maxrss which we use to store rss hiwater of the task. The
second one is ->cmaxrss which we use to store highest rss hiwater of all
task childs. These values are used in k_getrusage() to actually fill
->ru_maxrss. k_getrusage() uses current rss hiwater value directly if mm
struct exists.Note:
exec() clear mm->hiwater_rss, but doesn't clear sig->maxrss.
it is intetionally behavior. *BSD getrusage have exec() inheriting.test programs
========================================================getrusage.c
===========
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include#include "common.h"
#define err(str) perror(str), exit(1)
int main(int argc, char** argv)
{
int status;printf("allocate 100MB\n");
consume(100);printf("testcase1: fork inherit? \n");
printf(" expect: initial.self ~= child.self\n");
show_rusage("initial");
if (__fork()) {
wait(&status);
} else {
show_rusage("fork child");
_exit(0);
}
printf("\n");printf("testcase2: fork inherit? (cont.) \n");
printf(" expect: initial.children ~= 100MB, but child.children = 0\n");
show_rusage("initial");
if (__fork()) {
wait(&status);
} else {
show_rusage("child");
_exit(0);
}
printf("\n");printf("testcase3: fork + malloc \n");
printf(" expect: child.self ~= initial.self + 50MB\n");
show_rusage("initial");
if (__fork()) {
wait(&status);
} else {
printf("allocate +50MB\n");
consume(50);
show_rusage("fork child");
_exit(0);
}
printf("\n");printf("testcase4: grandchild maxrss\n");
printf(" expect: post_wait.children ~= 300MB\n");
show_rusage("initial");
if (__fork()) {
wait(&status);
show_rusage("post_wait");
} else {
system("./child -n 0 -g 300");
_exit(0);
}
printf("\n");printf("testcase5: zombie\n");
printf(" expect: pre_wait ~= initial, IOW the zombie process is not accounted.\n");
printf(" post_wait ~= 400MB, IOW wait() collect child's max_rss. \n");
show_rusage("initial");
if (__fork()) {
sleep(1); /* children become zombie */
show_rusage("pre_wait");
wait(&status);
show_rusage("post_wait");
} else {
system("./child -n 400");
_exit(0);
}
printf("\n");printf("testcase6: SIG_IGN\n");
printf(" expect: initial ~= after_zombie (child's 500MB alloc should be ignored).\n");
show_rusage("initial");
signal(SIGCHLD, SIG_IGN);
if (__fork()) {
sleep(1); /* children become zombie */
show_rusage("after_zombie");
} else {
system("./child -n 500");
_exit(0);
}
printf("\n");
signal(SIGCHLD, SIG_DFL);printf("testcase7: exec (without fork) \n");
printf(" expect: initial ~= exec \n");
show_rusage("initial");
execl("./child", "child", "-v", NULL);return 0;
}child.c
=======
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include#include "common.h"
int main(int argc, char** argv)
{
int status;
int c;
long consume_size = 0;
long grandchild_consume_size = 0;
int show = 0;while ((c = getopt(argc, argv, "n:g:v")) != -1) {
switch (c) {
case 'n':
consume_size = atol(optarg);
break;
case 'v':
show = 1;
break;
case 'g':grandchild_consume_size = atol(optarg);
break;
default:
break;
}
}if (show)
show_rusage("exec");if (consume_size) {
printf("child alloc %ldMB\n", consume_size);
consume(consume_size);
}if (grandchild_consume_size) {
if (fork()) {
wait(&status);
} else {
printf("grandchild alloc %ldMB\n", grandchild_consume_size);
consume(grandchild_consume_size);exit(0);
}
}return 0;
}common.c
========
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include#include "common.h"
#define err(str) perror(str), exit(1)void show_rusage(char *prefix)
{
int err, err2;
struct rusage rusage_self;
struct rusage rusage_children;printf("%s: ", prefix);
err = getrusage(RUSAGE_SELF, &rusage_self);
if (!err)
printf("self %ld ", rusage_self.ru_maxrss);
err2 = getrusage(RUSAGE_CHILDREN, &rusage_children);
if (!err2)
printf("children %ld ", rusage_children.ru_maxrss);printf("\n");
}/* Some buggy OS need this worthless CPU waste. */
void make_pagefault(void)
{
void *addr;
int size = getpagesize();
int i;for (i=0; i
Signed-off-by: KOSAKI Motohiro
Cc: Oleg Nesterov
Cc: Hugh Dickins
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
abs() will truncate the input if is it outside the 2^32 range. Fix that
by assuming `long' input.This might generate worse code in the common case.
Signed-off-by: Rolf Eike Beer
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Split the anonfd interface into a bare file pointer creation one, and a
file pointer creation plus install one.There are cases, like the usage of eventfds inside other kernel
interfaces, where the file pointer created by anonfd needs to be used
inside the initialization of other structures.As it is right now, as soon as anon_inode_getfd() returns, the kenrle can
race with userspace closing the newly installed file descriptor.This patch, while keeping the old anon_inode_getfd(), introduces a new
anon_inode_getfile() (whose services are reused in anon_inode_getfd())
that allows to split the file creation phase and the fd install one.Once all the kernel structures are initialized, the code can call the
proper fd_install().Gregory manifested the need for something like this inside KVM.
Signed-off-by: Davide Libenzi
Cc: Alexander Viro
Cc: James Morris
Cc: Peter Zijlstra
Cc: Gregory Haskins
Acked-by: Serge Hallyn
Acked-by: Roland Dreier
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
gcc permitting variable length arrays makes the current construct used for
BUILD_BUG_ON() useless, as that doesn't produce any diagnostic if the
controlling expression isn't really constant. Instead, this patch makes
it so that a bit field gets used here. Consequently, those uses where the
condition isn't really constant now also need fixing.Note that in the gfp.h, kmemcheck.h, and virtio_config.h cases
MAYBE_BUILD_BUG_ON() really just serves documentation purposes - even if
the expression is compile time constant (__builtin_constant_p() yields
true), the array is still deemed of variable length by gcc, and hence the
whole expression doesn't have the intended effect.[akpm@linux-foundation.org: make arch/sparc/include/asm/vio.h compile]
[akpm@linux-foundation.org: more nonsensical assertions in tpm.c..]
Signed-off-by: Jan Beulich
Cc: Andi Kleen
Cc: Rusty Russell
Cc: Catalin Marinas
Cc: "David S. Miller"
Cc: Rajiv Andrade
Cc: Mimi Zohar
Cc: James Morris
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Using the type bool (instead of int) for the __print_once flag in the
printk_once() macro matches the intent of the code better, and allows the
compiler to generate smaller code; eg a typical callsite with gcc 4.3.3 on
i386:add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-6 (-6)
function old new delta
static.__print_once 4 1 -3
get_cpu_vendor 146 143 -3Saving 6 bytes of object size per callsite by slightly improving the
readability of the source seems like a win to me.Signed-off-by: Roland Dreier
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The act of a process becoming a session leader is a useful signal to a
supervising init daemon such as Upstart.While a daemon will normally do this as part of the process of becoming a
daemon, it is rare for its children to do so. When the children do, it is
nearly always a sign that the child should be considered detached from the
parent and not supervised along with it.The poster-child example is OpenSSH; the per-login children call setsid()
so that they may control the pty connected to them. If the primary daemon
dies or is restarted, we do not want to consider the per-login children
and want to respawn the primary daemon without killing the children.This patch adds a new PROC_SID_EVENT and associated structure to the
proc_event event_data union, it arranges for this to be emitted when the
special PIDTYPE_SID pid is set.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Scott James Remnant
Acked-by: Matt Helsley
Cc: Oleg Nesterov
Cc: Evgeniy Polyakov
Acked-by: "David S. Miller"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make all seq_operations structs const, to help mitigate against
revectoring user-triggerable function pointers.This is derived from the grsecurity patch, although generated from scratch
because it's simpler than extracting the changes from there.Signed-off-by: James Morris
Acked-by: Serge Hallyn
Acked-by: Casey Schaufler
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch can remove spinlock from struct call_function_data, the
reasons are below:1: add a new interface for cpumask named cpumask_test_and_clear_cpu(),
it can atomically test and clear specific cpu, we can use it instead
of cpumask_test_cpu() and cpumask_clear_cpu() and no need data->lock
to protect those in generic_smp_call_function_interrupt().2: in smp_call_function_many(), after csd_lock() return, the current's
cfd_data is deleted from call_function list, so it not have race
between other cpus, then cfs_data is only used in
smp_call_function_many() that must disable preemption and not from
a hardware interrupthandler or from a bottom half handler to call,
only the correspond cpu can use it, so it not have race in current
cpu, no need cfs_data->lock to protect it.3: after 1 and 2, cfs_data->lock is only use to protect cfs_data->refs in
generic_smp_call_function_interrupt(), so we can define cfs_data->refs
to atomic_t, and no need cfs_data->lock any more.Signed-off-by: Xiao Guangrong
Cc: Ingo Molnar
Cc: Jens Axboe
Cc: Nick Piggin
Cc: Peter Zijlstra
Acked-by: Rusty Russell
[akpm@linux-foundation.org: use atomic_dec_return()]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move various magic-number definitions into magic.h.
Signed-off-by: Nick Black
Acked-by: Pekka Enberg
Cc: Al Viro
Cc: "David S. Miller"
Cc: Casey Schaufler
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When syslog is not possible, at the same time there's no serial/net
console available, it will be hard to read the printk messages. For
example oops/panic/warning messages in shutdown phase.Add a printk delay feature, we can make each printk message delay some
milliseconds.Setting the delay by proc/sysctl interface: /proc/sys/kernel/printk_delay
The value range from 0 - 10000, default value is 0
[akpm@linux-foundation.org: fix a few things]
Signed-off-by: Dave Young
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
