12 Apr, 2008
6 commits
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* 'docs' of git://git.lwn.net/linux-2.6:
Add additional examples in Documentation/spinlocks.txt
Move sched-rt-group.txt to scheduler/
Documentation: move rpc-cache.txt to filesystems/
Documentation: move nfsroot.txt to filesystems/
Spell out behavior of atomic_dec_and_lock() in kerneldoc
Fix a typo in highres.txt
Fixes to the seq_file document
Fill out information on patch tags in SubmittingPatches
Add the seq_file documentation -
Checkpatch will throw an error if code doesn't use the correct initializers
for static spinlocks:ERROR: Use of SPIN_LOCK_UNLOCKED is deprecated: see Documentation/spinlocks.txt
This is fine, but Documentation/spinlocks.txt isn't very clear on how to
_use_ the new initializers for static variables. To save people time in the
future, I added two small examples of how to fix old-style static
initializers to be more lockdep friendly.Signed-off-by: Mark Fasheh
Signed-off-by: Jonathan Corbet -
Signed-off-by: J. Bruce Fields
Signed-off-by: Jonathan Corbet -
This file is nfs-related. (Maybe Documentation/filesystems/ would
benefit from a separate nfs/ directory at some point.)Signed-off-by: J. Bruce Fields
Signed-off-by: Jonathan Corbet -
Documentation/ is a little large, and filesystems/ seems an obvious
place for this file.Signed-off-by: J. Bruce Fields
Signed-off-by: Jonathan Corbet -
A little more detail here wouldn't hurt.
Signed-off-by: J. Bruce Fields
Signed-off-by: Jonathan Corbet
11 Apr, 2008
33 commits
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git commit 54a015104136974262afa4b8ddd943ea70dec8a2 ("asmlinkage_protect
replaces prevent_tail_call") causes this build failure on s390:AS arch/s390/kernel/entry64.o
In file included from arch/s390/kernel/entry64.S:14:
include/linux/linkage.h:34: error: syntax error in macro parameter list
make[1]: *** [arch/s390/kernel/entry64.o] Error 1
make: *** [arch/s390/kernel] Error 2and some other architectures. The reason is that some architectures add
the "-traditional" flag to the invocation of $(AS), which disables
variadic macro argument support.So just surround the new define with an #ifndef __ASSEMBLY__ to prevent
any side effects on asm code.Cc: Roland McGrath
Cc: Martin Schwidefsky
Signed-off-by: Heiko Carstens
Signed-off-by: Linus Torvalds -
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
i2c-tiny-usb: New VID/PID pair
i2c-davinci: Fix lost interrupt
i2c-ibm_iic: Fast mode parm desc fixup -
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
[NETNS][IPV6] tcp - assign the netns for timewait sockets
[IPV4]: Fix byte value boundary check in do_ip_getsockopt().
BNX2X: Correct bringing chip out of reset
[NETFILTER]: nf_nat: autoload IPv4 connection tracking
[NETFILTER]: xt_hashlimit: fix mask calculation
[XFRM]: xfrm_user: fix selector family initialization
rt61pci: rt61pci_beacon_update do not free skb twice
ssb-mipscore: Fix interrupt vectors
ssb-pcicore: Fix IRQ TPS flag handling
mac80211: use short_preamble mode from capability if ERP IE not present
[NET]: Undo code bloat in hot paths due to print_mac().
[TCP]: Don't allow FRTO to take place while MTU is being probed
[TCP]: tcp_simple_retransmit can cause S+L
[TCP]: Fix NewReno's fast rexmit/recovery problems with GSOed skb
[TCP]: Restore 2.6.24 mark_head_lost behavior for newreno/fack
nl80211: fix STA AID bug
b43legacy: fix bcm4303 crash
iwlwifi: fix n-band association problem
ipw2200: set MAC address on radiotap interface
libertas: fix mode initialization problem -
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC]: Fix several regset and ptrace bugs. -
Michael Kerrisk found out that signalfd was not reporting back user data
pushed using sigqueue:http://groups.google.com/group/linux.kernel/msg/9397cab8551e3123
The following patch makes signalfd report back the ssi_ptr and ssi_int members
of the signalfd_siginfo structure.Signed-off-by: Davide Libenzi
Acked-by: Michael Kerrisk
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Increase the PNP "number of devices" limit. We currently use an unsigned
char, which limits us to 256 devices per protocol. This patch changes that to
an unsigned int.Not all backends can take advantage of this: we limit ISAPNP to 10 devices in
isapnp_cfg_begin(), and PNPBIOS is limited to 256 devices because the BIOS
interfaces use a one-byte device node number.But there is no limit on the number of PNPACPI devices we may have. Large HP
Integrity machines have more than 256, which causes the current "unsigned char
number" to wrap around. This causes errors like this:pnp: PnP ACPI init
kobject_add failed for 00:00 with -EEXIST, don't try to register things with the same name in the same directory.Call Trace:
[] show_stack+0x40/0xa0
[] dump_stack+0x30/0x60
[] kobject_add+0x290/0x2c0
[] device_add+0x160/0x860
[] device_register+0x30/0x60
[] __pnp_add_device+0x130/0x180
[] pnp_add_device+0xb0/0xe0
[] pnpacpi_add_device+0x510/0x5a0
[] pnpacpi_add_device_handler+0x50/0x80This patch increases the limit to fix this PNPACPI problem. It should not
have any adverse effect on ISAPNP or PNPBIOS because their limits are still
enforced in the backends.Signed-off-by: Bjorn Helgaas
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If a failure is detected after a parity check operation has been initiated,
but before it completes handle_parity_checks5 will never quiesce operations on
the stripe.Explicitly handle this case by "canceling" the parity check, i.e. clear the
STRIPE_OP_CHECK flags and queue the stripe on the handle list again to refresh
any non-uptodate blocks.Kernel versions >= 2.6.23 are susceptible.
Cc:
Cc: NeilBrown
Signed-off-by: Dan Williams
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds the missing include directive to the
cciss.c source file. This was discovered by our release team when building
the kernel for the Alpha architecture.Errors were found as references to functions 'sg_init_table' and 'sg_page' do
not exist without the include for Alpha.Signed-off-by: Mike Pagano
Cc: Jens Axboe
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is
prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable RTC
platform drivers, to re-enable module auto loading.[dbrownell@users.sourceforge.net: more drivers, minor fix]
Signed-off-by: Kay Sievers
Signed-off-by: David Brownell
Cc: Greg KH
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is
prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable watchdog
drivers, to re-enable auto loading.[dbrownell@users.sourceforge.net: more drivers; registration fixes]
Signed-off-by: Kay Sievers
Signed-off-by: David Brownell
Cc: Wim Van Sebroeck
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is
prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable USB HCDs,
to allow re-enable auto loading.[dbrownell@users.sourceforge.net: more drivers; registration fixes]
Signed-off-by: Kay Sievers
Signed-off-by: David Brownell
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is
prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable usb
peripheral drivers, to re-eable module auto loading.[dbrownell@users.sourceforge.net: registration fixes]
Signed-off-by: Kay Sievers
Signed-off-by: David Brownell
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is
prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable SPI
platform drivers, to allow module auto loading.[dbrownell@users.sourceforge.net: more drivers: registration fixes]
Signed-off-by: Kay Sievers
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Jeff Roberson discovered a race when using kaio eventfd based notifications.
When it occurs it can lead tomissed wakeups and hung userspace.This patch fixes the race by moving the notification inside the spinlocked
section of kaio. The operation is safe since eventfd spinlock and kaio one
are unrelated.Signed-off-by: Davide Libenzi
Cc: Zach Brown
Cc: Jeff Roberson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
rtc-s35390a uses BITREVERSE functions so it needs to select that config symbol
to ensure that the functions are built.drivers/built-in.o: In function `s35390a_set_datetime':
linux-2.6.25-rc8-git7/drivers/rtc/rtc-s35390a.c:144: undefined reference to `byte_rev_table'
drivers/built-in.o: In function `s35390a_get_datetime':
linux-2.6.25-rc8-git7/drivers/rtc/rtc-s35390a.c:163: undefined reference to `byte_rev_table'Signed-off-by: Randy Dunlap
Acked-by: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extend the /proc//cgroup file to include the appropriate hierarchy ID on
each line.Currently this ID isn't really needed since a hierarchy can be completely
identified by the set of subsystems bound to it, but this is likely to change
in the near future in order to support stateless subsystems and
merging/rebinding of subsystems. Getting this change into 2.6.25 reduces the
need for an API change later.Signed-off-by: Paul Menage
Cc: Balbir Singh
Cc: Pavel Emelyanov
Cc: KAMEZAWA Hiroyuki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I have recently bought some USB PIDs from EZPrototypes for my USB projects
and one will be for the i2c-tiny-usb. I have not yet started to use the new
one in the official i2c-tiny-usb firmware since i think it makes sense to get
the change into the kernel before releasing a modified firmware.This patch adds support for the EZPrototypes USB vid/pid pair used in later
i2c-tiny-usb firmware versions (avrusb v1.06 and up, usbtiny v2.06 and up).Signed-off-by: Till Harbaum
Signed-off-by: Jean Delvare -
DAVINCI_I2C_STR_REG is a write 1 to clear register,
so don't use a read/modify/write cycle.Signed-off-by: Troy Kisky
Acked-by: Dirk Behme
Signed-off-by: Kevin Hilman
Signed-off-by: Jean Delvare -
Noticed this when grepping for fast mode module params, the i2c-ibm_iic
driver was using a non-existent variable for MODULE_PARM_DESC. Fix it up
to reflect what it's actually supposed to be describing.Signed-off-by: Paul Mundt
Signed-off-by: Jean Delvare -
Copy the network namespace from the socket to the timewait socket.
Signed-off-by: Daniel Lezcano
Acked-by: Mark Lord
Signed-off-by: David S. Miller -
It's really a pretty ugly thing to need, and some day it will hopefully
be obviated by teaching gcc about the magic calling conventions for the
low-level system call code, but in the meantime we can at least add big
honking comments about why we need these insane and strange macros.I took my comments from my version of the macro, but I ended up deciding
to just pick Roland's version of the actual code instead (with his
prettier syntax that uses vararg macros). Thus the previous two commits
that actually implement it.Signed-off-by: Linus Torvalds
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Use asmlinkage_protect in sys_io_getevents, because GCC for i386 with
CONFIG_FRAME_POINTER=n can decide to clobber an argument word on the
stack, i.e. the user struct pt_regs. Here the problem is not a tail
call, but just the compiler's use of the stack when it inlines and
optimizes the body of the called function. This seems to avoid it.Signed-off-by: Roland McGrath
Signed-off-by: Linus Torvalds -
The prevent_tail_call() macro works around the problem of the compiler
clobbering argument words on the stack, which for asmlinkage functions
is the caller's (user's) struct pt_regs. The tail/sibling-call
optimization is not the only way that the compiler can decide to use
stack argument words as scratch space, which we have to prevent.
Other optimizations can do it too.Until we have new compiler support to make "asmlinkage" binding on the
compiler's own use of the stack argument frame, we have work around all
the manifestations of this issue that crop up.More cases seem to be prevented by also keeping the incoming argument
variables live at the end of the function. This makes their original
stack slots attractive places to leave those variables, so the compiler
tends not clobber them for something else. It's still no guarantee, but
it handles some observed cases that prevent_tail_call() did not.Signed-off-by: Roland McGrath
Signed-off-by: Linus Torvalds -
This patch also resolves hangs on boot:
http://lkml.org/lkml/2008/2/23/263
http://bugzilla.kernel.org/show_bug.cgi?id=10093The bug was causing once-in-few-reboots 10-15 sec wait during boot on
certain laptops.Earlier commit 40d6a146629b98d8e322b6f9332b182c7cbff3df added
smp_call_function in cpu_idle_wait() to kick cpus that are in tickless
idle. Looking at cpu_idle_wait code at that time, code seemed to be
over-engineered for a case which is rarely used (while changing idle
handler).Below is a simplified version of cpu_idle_wait, which just makes a dummy
smp_call_function to all cpus, to make them come out of old idle handler
and start using the new idle handler. It eliminates code in the idle
loop to handle cpu_idle_wait.Signed-off-by: Venkatesh Pallipadi
Signed-off-by: Linus Torvalds -
Shift of a LE value seems strange, probably meant to shift the cpu-order
variable as in the prvious section of the switch statement.Signed-off-by: Harvey Harrison
Acked-by: Richard Purdie
Signed-off-by: Linus Torvalds -
Don't make smp_{r,w,}mb() interpolate a MEMBAR instruction when CONFIG_SMP=n as
SMP memory barries on UP systems should interpolate a compiler barrier only.Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
Make NOMMU-mode work with base addresses other than 0xC0000000 by:
(1) Giving the code that sets up the protection registers the right address
in __sdram_base. Rather than being hard coded to 0xC0000000, the value
of __page_offset is obtained from the linker script.(2) Eliminate the check in __switch_to() that verifies the current thread
info is in the 0xCxxxxxxx region.Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
Use traps 120-126 to emulate atomic cmpxchg32, xchg32, and XOR-, OR-, AND-, SUB-
and ADD-to-memory operations for userspace.Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
Move STACK_TOP_MAX up so that we don't try moving the stack above it as that
causes setup_arg_pages() to malfunction.Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
Handle update_mmu_cache() being called when current->mm is NULL.
We cache static TLB mappings for the current page table in DAMPR4 and DAMPR5
on the theory that the next data lookup is likely to be in the same general
region, and thus is likely to be mapped by the same page table. However, we
can't get this information if we can't access the appropriate mm_struct.If current->mm is NULL, we just clear the cache in the knowledge that the TLB
miss handlers will load it.Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
* 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6:
[XFS] Ensure "both" features2 slots are consistent
[XFS] Fix superblock features2 field alignment problem
[XFS] remove shouting-indirection macros from xfs_sb.h -
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
cfq-iosched: do not leak ioc_data across iosched switches
splice: fix infinite loop in generic_file_splice_read() -
Some time ago while attempting to handle invalid link counts, I botched
the unlink of links itself, so this patch fixes this now correctly, so
that only the link count of nodes that don't point to links is ignored.
Thanks to Vlado Plaga to notify me of this
problem.Signed-off-by: Roman Zippel
Signed-off-by: Linus Torvalds
10 Apr, 2008
1 commit
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This fixes kernel bugzilla 10371.
As reported by M.Piechaczek@osmosys.tv, if we try to grab a
char sized socket option value, as in:unsigned char ttl = 255;
socklen_t len = sizeof(ttl);
setsockopt(socket, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, &len);getsockopt(socket, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, &len);
The ttl returned will be wrong on big-endian, and on both little-
endian and big-endian the next three bytes in userspace are written
with garbage.It's because of this test in do_ip_getsockopt():
if (len < sizeof(int) && len > 0 && val>=0 && val
