The CPU hotplug locking was quite messy, with a recursive lock to
handle the fact that both the actual up/down sequence wanted to
protect itself from being re-entered, but the callbacks that it
called also tended to want to protect themselves from CPU events.
This splits the lock into two (one to serialize the whole hotplug
sequence, the other to protect against the CPU present bitmaps
changing). The latter still allows recursive usage because some
subsystems (ondemand policy for cpufreq at least) had already gotten
too used to the lax locking, but the locking mistakes are hopefully
now less fundamental, and we now warn about recursive lock usage
when we see it, in the hope that it can be fixed.
[cpufreq] ondemand: make shutdown sequence more robust
Shutting down the ondemand policy was fraught with potential
problems, causing issues for SMP suspend (which wants to hot-
unplug) all but the last CPU.
This should fix at least the worst problems (divide-by-zero
and infinite wait for the workqueue to shut down).
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (21 commits)
[TIPC]: Removing useless casts
[IPV4]: Fix nexthop realm dumping for multipath routes
[DUMMY]: Avoid an oops when dummy_init_one() failed
[IFB] After ifb_init_one() failed, i is increased. Decrease
[NET]: Fix reversed error test in netif_tx_trylock
[MAINTAINERS]: Mark LAPB as Oprhan.
[NET]: Conversions from kmalloc+memset to k(z|c)alloc.
[NET]: sun happymeal, little pci cleanup
[IrDA]: Use alloc_skb() in IrDA TX path
[I/OAT]: Remove pci_module_init() from Intel I/OAT DMA engine
[I/OAT]: net/core/user_dma.c should #include <net/netdma.h>
[SCTP]: ADDIP: Don't use an address as source until it is ASCONF-ACKed
[SCTP]: Set chunk->data_accepted only if we are going to accept it.
[SCTP]: Verify all the paths to a peer via heartbeat before using them.
[SCTP]: Unhash the endpoint in sctp_endpoint_free().
[SCTP]: Check for NULL arg to sctp_bucket_destroy().
[PKT_SCHED] netem: Fix slab corruption with netem (2nd try)
[WAN]: Converted synclink drivers to use netif_carrier_*()
[WAN]: Cosmetic changes to N2 and C101 drivers
[WAN]: Added missing netif_dormant_off() to generic HDLC
...
Patrick McHardy [Fri, 21 Jul 2006 22:09:55 +0000 (15:09 -0700)]
[IPV4]: Fix nexthop realm dumping for multipath routes
Routing realms exist per nexthop, but are only returned to userspace
for the first nexthop. This is due to the fact that iproute2 only
allows to set the realm for the first nexthop and the kernel refuses
multipath routes where only a single realm is present.
Dump all realms for multipath routes to enable iproute to correctly
display them.
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Nicolas Dichtel [Fri, 21 Jul 2006 21:56:02 +0000 (14:56 -0700)]
[IFB] After ifb_init_one() failed, i is increased. Decrease
It before entering in the loop for freeing the other ifb devices.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
Samuel Ortiz [Fri, 21 Jul 2006 21:50:41 +0000 (14:50 -0700)]
[IrDA]: Use alloc_skb() in IrDA TX path
As pointed out by Christoph Hellwig, dev_alloc_skb() is not intended to be
used for allocating TX sk_buff. The IrDA stack was exclusively calling
dev_alloc_skb() on the TX path, and this patch fixes that.
Signed-off-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
[SCTP]: Unhash the endpoint in sctp_endpoint_free().
This prevents a race between the close of a socket and receive of an
incoming packet.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
[PKT_SCHED] netem: Fix slab corruption with netem (2nd try)
CONFIG_DEBUG_SLAB found the following bug:
netem_enqueue() in sch_netem.c gets a pointer inside a slab object:
struct netem_skb_cb *cb = (struct netem_skb_cb *)skb->cb;
But then, the slab object may be freed:
skb = skb_unshare(skb, GFP_ATOMIC)
cb is still pointing inside the freed skb, so here is a patch to
initialize cb later, and make it clear that initializing it sooner
is a bad idea.
[From Stephen Hemminger: leave cb unitialized in order to let gcc
complain in case of use before initialization]
Signed-off-by: Guillaume Chazarain <guichaz@yahoo.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 20 Jul 2006 05:55:08 +0000 (22:55 -0700)]
[SERIAL] sunzilog: Fix instance enumeration.
Just do a linear enumeration so that we handle sun4d systems
correctly. As a consequence, eliminate the hard coded keyboard and
mouse channel line values, use the CONS_{KEYB,MS} flags instead.
Also, report the keyboard/mouse Zilog channels just like the uart ones
do.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 18 Jul 2006 04:39:09 +0000 (21:39 -0700)]
[SPARC]: Fix initialization of sun4d SBUS interrupts.
1) Explicitly traverse to the root looking for the "sbi".
2) Grab the "board#" property from the sbi's parent and
verify that this parent is an "io-unit" node.
3) Skip IRQ initialization when device lacks "reg" property.
Signed-off-by: David S. Miller <davem@davemloft.net>
Bob Breuer [Tue, 18 Jul 2006 00:05:56 +0000 (17:05 -0700)]
[SPARC]: Fix property name acquisition in prom.c
On sparc32 the prom_{first,next}prop() interfaces work
a little differently. The buffer argument is ignored on
sparc32 and the firmware just returns a raw pointer to
the property name.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 17 Jul 2006 05:10:44 +0000 (22:10 -0700)]
[SPARC64]: Fix more of_device layer IRQ bugs, and correct PROMREG_MAX.
Sabre and Psycho PCI controllers can have partial interrupt-map
properties, meaning that on-board devices don't match up to any
entries. Instead, they are fully specified from the beginning and
we should pass them directly to the IRQ translator as-is.
Also, fill in the necessary translator slots for the "graphics"
and "expansion UPA" interrupts on Sabre, Psycho, and SYSIO SBUS.
Increase PROMREG_MAX to 24, as seen on SUNW,ffb devices.
Finally, prevent accidentally writing past the end of the of_device
struct resource[] and irqs[] arrays. Spit out a log message when
we ignore some entries because there are too many of them.
Signed-off-by: David S. Miller <davem@davemloft.net>
* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: (38 commits)
[SCSI] More buffer->request_buffer changes
[SCSI] mptfusion: bump version to 3.04.01
[SCSI] mptfusion: misc fix's
[SCSI] mptfusion: firmware download boot fix's
[SCSI] mptfusion: task abort fix's
[SCSI] mptfusion: sas nexus loss support
[SCSI] mptfusion: sas loginfo update
[SCSI] mptfusion: mptctl panic when loading
[SCSI] mptfusion: sas enclosures with smart drive
[SCSI] NCR_D700: misc fixes (section and argument ordering)
[SCSI] scsi_debug: must_check fixes
[SCSI] scsi_transport_sas: kill the use of channel
[SCSI] scsi_transport_sas: add expander backlink
[SCSI] hide EH backup data outside the scsi_cmnd
[SCSI] ibmvscsi: handle inactive SCSI target during probe
[SCSI] ibmvscsi: allocate lpevents for ibmvscsi on iseries
[SCSI] aic7[9x]xx: Remove last vestiges of reverse_scan
[SCSI] aha152x: stop poking at saved scsi_cmnd members
[SCSI] st.c: Improve sense output
[SCSI] lpfc 8.1.7: Change version number to 8.1.7
...
Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
[PATCH] spidernet: rework tx queue handling
[PATCH] spidernet: bug fix for init code
[PATCH] sky2: NAPI poll fix
[NET] ethtool: fix oops by testing correct struct member
e1000: bump version to 7.1.9-k4
e1000: fix panic on large frame receive when mtu=default
e1000: remove CRC bytes from measured packet length
e1000: Redo netpoll fix to address community concerns
With this patch TX queue descriptors are not chained per default any more.
The pointer to next descriptor is set only when next descriptor is prepaired
for transfer. Also the mechanism of checking wether Spider is ready has been
changed: it checks not for CARDOWNED flag in status of previous descriptor
but for a TXDMAENABLED flag in Spider's register.
When sky2 driver gets lots of received packets at once, it can get stuck.
The NAPI poll routine gets called back to keep going, but since no IRQ bits
are set it doesn't make progress.
Increase version, since this is serious enough problem that I want to be
able to tell new from old problems.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Prior to this patch, the driver would do this for each port:
read 8-bit PCS
write 8-bit PCS
read 8-bit PCS
write 8-bit PCS
In the field, flaky behavior has been observed related to this register.
In particular, these overzealous register writes can cause misdetection
problems.
Update to do the following once (not once per port) at boot:
read 16-bit PCS
if needs changing,
write 16-bit PCS
And thereafter, we only perform a 'read 16-bit PCS' per port.
This should eliminate all PCS writes in many cases, and be more friendly
in the cases where we do need to enable ports.
Tejun Heo [Wed, 28 Jun 2006 16:58:28 +0000 (01:58 +0900)]
[PATCH] ata_piix: add host_set private structure
Add host_set private structure piix_host_priv. Currently the only
field is ->map which used to be stored directly at
host_set->private_data. This change allows more host_set private
fields to be added.
Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Jeff Dike [Fri, 14 Jul 2006 19:52:23 +0000 (15:52 -0400)]
[PATCH] UML - fix utsname build breakage
Some -mm-only material leaked into a patch destined for mainline, and I didn't
notice.
This was the replacement of system_utsname with utsname() that's required by
the uts namespace patch. This patch reverts those changes (which are correct
in -mm) so that mainline UML builds again.
Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This just turns off chmod() on the /proc/<pid>/ files, since there is no
good reason to allow it, and had we disallowed it originally, the nasty
/proc race exploit wouldn't have been possible.
The other patches already fixed the problem chmod() could cause, so this
is really just some final mop-up..
This particular version is based off a patch by Eugene and Marcel which
had much better naming than my original equivalent one.
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
[VLAN]: __vlan_hwaccel_rx can use the faster ether_compare_addr
[PKT_SCHED] HTB: initialize upper bound properly
[IPV4]: Clear skb cb on IP input
[NET]: Update frag_list in pskb_trim
Steven Rostedt [Fri, 14 Jul 2006 20:05:03 +0000 (16:05 -0400)]
[PATCH] remove set_wmb - arch removal
set_wmb should not be used in the kernel because it just confuses the
code more and has no benefit. Since it is not currently used in the
kernel this patch removes it so that new code does not include it.
All archs define set_wmb(var, value) to do { var = value; wmb(); }
while(0) except ia64 and sparc which use a mb() instead. But this is
still moot since it is not used anyway.
Hasn't been tested on any archs but x86 and x86_64 (and only compiled
tested)
Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] Remove down_write() from taskstats code invoked on the exit() path
In send_cpu_listeners(), which is called on the exit path, a down_write()
was protecting operations like skb_clone() and genlmsg_unicast() that do
GFP_KERNEL allocations. If the oom-killer decides to kill tasks to satisfy
the allocations,the exit of those tasks could block on the same semphore.
The down_write() was only needed to allow removal of invalid listeners from
the listener list. The patch converts the down_write to a down_read and
defers the removal to a separate critical region. This ensures that even
if the oom-killer is called, no other task's exit is blocked as it can
still acquire another down_read.
Thanks to Andrew Morton & Herbert Xu for pointing out the oom related
pitfalls, and to Chandra Seetharaman for suggesting this fix instead of
using something more complex like RCU.
[PATCH] per-task delay accounting taskstats interface: control exit data through cpumasks
On systems with a large number of cpus, with even a modest rate of tasks
exiting per cpu, the volume of taskstats data sent on thread exit can
overflow a userspace listener's buffers.
One approach to avoiding overflow is to allow listeners to get data for a
limited and specific set of cpus. By scaling the number of listeners
and/or the cpus they monitor, userspace can handle the statistical data
overload more gracefully.
In this patch, each listener registers to listen to a specific set of cpus
by specifying a cpumask. The interest is recorded per-cpu. When a task
exits on a cpu, its taskstats data is unicast to each listener interested
in that cpu.
Thanks to Andrew Morton for pointing out the various scalability and
general concerns of previous attempts and for suggesting this design.
[PATCH] per-task delay accounting: avoid send without listeners
Don't send taskstats (per-pid or per-tgid) on thread exit when no one is
listening for such data.
Currently the taskstats interface allocates a structure, fills it in and
calls netlink to send out per-pid and per-tgid stats regardless of whether
a userspace listener for the data exists (netlink layer would check for
that and avoid the multicast).
As a result of this patch, the check for the no-listener case is performed
early, avoiding the redundant allocation and filling up of the taskstats
structures.
Signed-off-by: Balbir Singh <balbir@in.ibm.com> Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] delay accounting taskstats interface send tgid once
Send per-tgid data only once during exit of a thread group instead of once
with each member thread exit.
Currently, when a thread exits, besides its per-tid data, the per-tgid data
of its thread group is also sent out, if its thread group is non-empty.
The per-tgid data sent consists of the sum of per-tid stats for all
*remaining* threads of the thread group.
This patch modifies this sending in two ways:
- the per-tgid data is sent only when the last thread of a thread group
exits. This cuts down heavily on the overhead of sending/receiving
per-tgid data, especially when other exploiters of the taskstats
interface aren't interested in per-tgid stats
- the semantics of the per-tgid data sent are changed. Instead of being
the sum of per-tid data for remaining threads, the value now sent is the
true total accumalated statistics for all threads that are/were part of
the thread group.
The patch also addresses a minor issue where failure of one accounting
subsystem to fill in the taskstats structure was causing the send of
taskstats to not be sent at all.
The patch has been tested for stability and run cerberus for over 4 hours
on an SMP.
[akpm@osdl.org: bugfixes] Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com> Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] per-task-delay-accounting: /proc export of aggregated block I/O delays
Export I/O delays seen by a task through /proc/<tgid>/stats for use in top
etc.
Note that delays for I/O done for swapping in pages (swapin I/O) is clubbed
together with all other I/O here (this is not the case in the netlink
interface where the swapin I/O is kept distinct)
[akpm@osdl.org: printk warning fix] Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com> Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Peter Chubb <peterc@gelato.unsw.edu.au> Cc: Erich Focht <efocht@ess.nec.de> Cc: Levent Serinol <lserinol@gmail.com> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Create a "taskstats" interface based on generic netlink (NETLINK_GENERIC
family), for getting statistics of tasks and thread groups during their
lifetime and when they exit. The interface is intended for use by multiple
accounting packages though it is being created in the context of delay
accounting.
This patch creates the interface without populating the fields of the data
that is sent to the user in response to a command or upon the exit of a task.
Each accounting package interested in using taskstats has to provide an
additional patch to add its stats to the common structure.
[akpm@osdl.org: cleanups, Kconfig fix] Signed-off-by: Shailabh Nagar <nagar@us.ibm.com> Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Peter Chubb <peterc@gelato.unsw.edu.au> Cc: Erich Focht <efocht@ess.nec.de> Cc: Levent Serinol <lserinol@gmail.com> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] per-task-delay-accounting: cpu delay collection via schedstats
Make the task-related schedstats functions callable by delay accounting even
if schedstats collection isn't turned on. This removes the dependency of
delay accounting on schedstats.
Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com> Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Peter Chubb <peterc@gelato.unsw.edu.au> Cc: Erich Focht <efocht@ess.nec.de> Cc: Levent Serinol <lserinol@gmail.com> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] per-task-delay-accounting: sync block I/O and swapin delay collection
Unlike earlier iterations of the delay accounting patches, now delays are only
collected for the actual I/O waits rather than try and cover the delays seen
in I/O submission paths.
Account separately for block I/O delays incurred as a result of swapin page
faults whose frequency can be affected by the task/process' rss limit. Hence
swapin delays can act as feedback for rss limit changes independent of I/O
priority changes.
Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com> Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Peter Chubb <peterc@gelato.unsw.edu.au> Cc: Erich Focht <efocht@ess.nec.de> Cc: Levent Serinol <lserinol@gmail.com> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Initialization code related to collection of per-task "delay" statistics which
measure how long it had to wait for cpu, sync block io, swapping etc. The
collection of statistics and the interface are in other patches. This patch
sets up the data structures and allows the statistics collection to be
disabled through a kernel boot parameter.
Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com> Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Peter Chubb <peterc@gelato.unsw.edu.au> Cc: Erich Focht <efocht@ess.nec.de> Cc: Levent Serinol <lserinol@gmail.com> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Mike Rapoport [Fri, 14 Jul 2006 07:24:34 +0000 (00:24 -0700)]
[PATCH] mbxfb: Add framebuffer driver for the Intel 2700G
Add frame buffer driver for the 2700G LCD controller present on CompuLab
CM-X270 computer module.
[adaplas]
- Add more informative help text to Kconfig
- Make DEBUG a Kconfig option as FB_MBX_DEBUG
- Remove #include mbxdebug.c, this is frowned upon
- Remove redundant casts
- Arrange #include's alphabetically
- Trivial whitespace
Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Eric Paris [Fri, 14 Jul 2006 07:24:33 +0000 (00:24 -0700)]
[PATCH] Fix security check for joint context= and fscontext= mount options
After some discussion on the actual meaning of the filesystem class
security check in try context mount it was determined that the checks for
the context= mount options were not correct if fscontext mount option had
already been used.
When labeling the superblock we should be checking relabel_from and
relabel_to. But if the superblock has already been labeled (with
fscontext) then context= is actually labeling the inodes, and so we should
be checking relabel_from and associate. This patch fixes which checks are
called depending on the mount options.
Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Cc: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Adrian Bunk [Fri, 14 Jul 2006 07:24:32 +0000 (00:24 -0700)]
[PATCH] let the the lockdep options depend on DEBUG_KERNEL
The lockdep options should depend on DEBUG_KERNEL since:
- they are kernel debugging options and
- they do otherwise break the DEBUG_KERNEL menu structure
Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Kylene Jo Hall [Fri, 14 Jul 2006 07:24:31 +0000 (00:24 -0700)]
[PATCH] tpm: Add force device probe option
Some machine manufacturers are not sticking to the TCG specifications and
including an ACPI DSDT entry for the TPM which allows PNP discovery of the
device.
Signed-off-by: Kylene Hall <kjhall@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Randy Dunlap [Fri, 14 Jul 2006 07:24:28 +0000 (00:24 -0700)]
[PATCH] TPM: fix failure path leak
kfree(devname) on the misc_register() failure path. Otherwise it is lost
forever.
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Kylene Jo Hall <kjhall@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] lockdep: core, fix rq-lock handling on __ARCH_WANT_UNLOCKED_CTXSW
On platforms that have __ARCH_WANT_UNLOCKED_CTXSW set and want to implement
lock validator support there's a bug in rq->lock handling: in this case we
dont 'carry over' the runqueue lock into another task - but still we did a
spinlock_release() of it. Fix this by making the spinlock_release() in
context_switch() dependent on !__ARCH_WANT_UNLOCKED_CTXSW.
(Reported by Ralf Baechle on MIPS, which has __ARCH_WANT_UNLOCKED_CTXSW.
This fixes a lockdep-internal BUG message on such platforms.)
Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Jim Cromie [Fri, 14 Jul 2006 07:24:26 +0000 (00:24 -0700)]
[PATCH] gpio: rename exported vtables to better match purpose
- rename EXPORTed gpio vtables from {scx200,pc8736x}_access to _gpio_ops new
name is much closer to the vtable-name struct nsc_gpio_ops, should be
clearer. Also rename the _fops vtable var to _fileops to better
disambiguate it from the gpio vtable.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Jim Cromie [Fri, 14 Jul 2006 07:24:26 +0000 (00:24 -0700)]
[PATCH] gpio: cosmetics: remove needless newlines
- pure cosmetics: lose needless newlines.
- rename EXPORTed gpio vtables from {scx200,pc8736x}_access to _gpio_ops new
name is much closer to the vtable-name struct nsc_gpio_ops, should be
clearer. Also rename the _fops vtable var to _fileops to better
disambiguate it from the gpio vtable.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Jim Cromie [Fri, 14 Jul 2006 07:24:25 +0000 (00:24 -0700)]
[PATCH] gpio: drop vtable members .gpio_set_high .gpio_set_low gpio_set is enough
drops gpio_set_high, gpio_set_low from the nsc_gpio_ops vtable. While we
can't drop them from scx200_gpio (or can we?), we dont need them for new users
of the exported vtable; gpio_set(1), gpio_set(0) work fine.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] Remove pci_dac_set_dma_mask() from Documentation/DMA-mapping.txt
pci_dac_set_dma_mask() gives only a single match in the whole kernel tree
and that's in this doc file. The best candidate for replacement is
pci_dac_dma_supported().
Roland Dreier [Fri, 14 Jul 2006 07:24:23 +0000 (00:24 -0700)]
[PATCH] Convert idr's internal locking to _irqsave variant
Currently, the code in lib/idr.c uses a bare spin_lock(&idp->lock) to do
internal locking. This is a nasty trap for code that might call idr
functions from different contexts; for example, it seems perfectly
reasonable to call idr_get_new() from process context and idr_remove() from
interrupt context -- but with the current locking this would lead to a
potential deadlock.
The simplest fix for this is to just convert the idr locking to use
spin_lock_irqsave().
In particular, this fixes a very complicated locking issue detected by
lockdep, involving the ib_ipoib driver's priv->lock and dev->_xmit_lock,
which get involved with the ib_sa module's query_idr.lock.
Cc: Arjan van de Ven <arjan@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Zach Brown <zach.brown@oracle.com>, Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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