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While using separate IRQ stacks can cut down on stack consumption,
many users can also use 4k stacks directly without the additional
need of separate stacks for soft and hardirqs.
With this split, we support the same rationale for 4KSTACKS as
m68knommu, with the IRQSTACKS abstraction as per ppc64.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Follows s390 and others.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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As noted by David:
pte_page() is a macro defined as follows;
include/asm-sh/pgtable.h
#define pte_page(x) phys_to_page(pte_val(x)&PTE_PHYS_MASK)
include/asm-sh/page.h
#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT))
So as you can see the phys_to_page() macro doesn't wrap the 'phys'
parameter in parentheses so we end up with;
pte_val(x)&PTE_PHYS_MASK >> PAGE_SHIFT
Which is not what we wanted as '>>' has a higher precedence than bitwise
AND. I dug into the git repository and I believe this bug was added with
this commit (104b8deaa5c0144cccfc7d914413ff80c7176af1);
2006-03-27 KAMEZAWA Hiroyuki [PATCH] unify pfn_to_page: sh pfn_to_page
-#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >>
PAGE_SHIFT))
-#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) +
__MEMORY_START)
+#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT))
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
Reported-by: David ADDISON <david.addison@st.com>
Reported-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (34 commits)
[MIPS] tb0219: Update copyright message.
[MIPS] MT: Fix bug in multithreaded kernels.
[MIPS] Alchemy: Remove CONFIG_TS_AU1X00_ADS7846 from defconfigs.
Author: Ralf Baechle <ralf@linux-mips.org>
[MIPS] sb1250: Enable GenBus IDE in defconfig.
[MIPS] vmlinux.ld.S: correctly indent .data section
[MIPS] c-r3k: Implement flush_cache_range()
[MIPS] Store sign-extend register values for PTRACE_GETREGS
[MIPS] Alchemy: Register platform devices
[MIPS] Add len and addr validation for MAP_FIXED mappings.
[MIPS] IRIX: Fix off-by-one error in signal compat code.
[MIPS] time: Replace plat_timer_setup with modern APIs.
[MIPS] time: Fix cut'n'paste bug in Sibyte clockevent driver.
[MIPS] time: Make c0_compare_int_usable faster
[MIPS] time: Fix cevt-r4k.c for 64-bit kernel
[MIPS] Sibyte: Delete {sb1250,bcm1480}_steal_irq().
[MIPS] txx9tmr clockevent/clocksource driver
[MIPS] Add mips_hpt_frequency check to mips_clockevent_init().
[MIPS] IP32: Fixes after interrupt renumbering.
[MIPS] IP27: Fix slice logic to work for arbitrary number of slices.
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* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
sched: fix style in kernel/sched.c
sched: fix style of swap() macro in kernel/sched_fair.c
sched: report CPU usage in CFS cgroup directories
sched: move rcu_head to task_group struct
sched: fix incorrect assumption that cpu 0 exists
sched: keep utime/stime monotonic
sched: make kernel/sched.c:account_guest_time() static
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This reverts commit 2e1c49db4c640b35df13889b86b9d62215ade4b6.
First off, testing in Fedora has shown it to cause boot failures,
bisected down by Martin Ebourne, and reported by Dave Jobes. So the
commit will likely be reverted in the 2.6.23 stable kernels.
Secondly, in the 2.6.24 model, x86-64 has now grown support for
SPARSEMEM_VMEMMAP, which disables the relevant code anyway, so while the
bug is not visible any more, it's become invisible due to the code just
being irrelevant and no longer enabled on the only architecture that
this ever affected.
Reported-by: Dave Jones <davej@redhat.com>
Tested-by: Martin Ebourne <fedora@ebourne.me.uk>
Cc: Zou Nan hai <nanhai.zou@intel.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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keep utime/stime monotonic.
cpustats use utime/stime as a ratio against sum_exec_runtime, as a
consequence it can happen - when the ratio changes faster than time
accumulates - that either can be appear to go backwards.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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plat_timer_setup is no longer getting called.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Convert jmr3927_clock_event_device to more generic
txx9tmr_clock_event_device which supports one-shot mode. The
txx9tmr_clock_event_device can be used for TX49 too if the cp0 timer
interrupt was not available.
Convert jmr3927_hpt_read to txx9_clocksource driver which does not
depends jiffies anymore. The txx9_clocksource itself can be used for
TX49, but normally TX49 uses higher precision clocksource_mips.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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And general untangling.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'alpm' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[libata] AHCI: add hw link power management support
[libata] Link power management infrastructure
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[libata] AHCI: fix newly introduced host-reset bug
[libata] sata_nv: fix SWNCQ enabling
libata: add MAXTOR 7V300F0/VA111900 to NCQ blacklist
libata: no need to speed down if already at PIO0
libata: relocate forcing PIO0 on reset
pata_ns87415: define SUPERIO_IDE_MAX_RETRIES
[libata] Address some checkpatch-spotted issues
[libata] fix 'if(' and similar areas that lack whitespace
libata: implement ata_wait_after_reset()
libata: track SLEEP state and issue SRST to wake it up
libata: relocate and fix post-command processing
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Device Initiated Power Management, which is defined
in SATA 2.5 can be enabled for disks which support it.
This patch enables DIPM when the user sets the link
power management policy to "min_power".
Additionally, libata drivers can define a function
(enable_pm) that will perform hardware specific actions to
enable whatever power management policy the user set up
for Host Initiated Power management (HIPM).
This power management policy will be activated after all
disks have been enumerated and intialized. Drivers should
also define disable_pm, which will turn off link power
management, but not change link power management policy.
Documentation/scsi/link_power_management_policy.txt has additional
information.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
compat_ioctl: fix block device compat ioctl regression
[BLOCK] Fix bad sharing of tag busy list on queues with shared tag maps
Fix a build error when BLOCK=n
block: use lock bitops for the tag map.
cciss: update copyright notices
cfq_get_queue: fix possible NULL pointer access
blk_sync_queue() should cancel request_queue->unplug_work
cfq_exit_queue() should cancel cfq_data->unplug_work
block layer: remove a unused argument of drive_stat_acct()
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* 'sg' of git://git.kernel.dk/linux-2.6-block:
Correction of "Update drivers to use sg helpers" patch for IMXMMC driver
sg_init_table() should use unsigned loop index variable
sg_last() should use unsigned loop index variable
Initialise scatter/gather list in sg driver
Initialise scatter/gather list in ata_sg_setup
x86: fix pci-gart failure handling
SG: s390-scsi: missing size parameter in zfcp_address_to_sg()
SG: clear termination bit in sg_chain()
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Use of ptrdiff_t in places like
- if (!access_ok(VERIFY_WRITE, u_tmp->rx_buf, u_tmp->len))
+ if (!access_ok(VERIFY_WRITE, (u8 __user *)
+ (ptrdiff_t) u_tmp->rx_buf,
+ u_tmp->len))
is wrong; for one thing, it's a bad C (it's what uintptr_t is for; in general
we are not even promised that ptrdiff_t is large enough to hold a pointer,
just enough to hold a difference between two pointers within the same object).
For another, it confuses the fsck out of sparse.
Use unsigned long or uintptr_t instead. There are several places misusing
ptrdiff_t; fixed.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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rpcrdma stuff lacks endianness annotations for on-the-wire data.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Don't undef __i386__/__x86_64__ in uml anymore, make sure that (few) places
that required adjusting the ifdefs got those.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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For the locking to work, only the tag map and tag bit map may be shared
(incidentally, I was just explaining this to Nick yesterday, but I
apparently didn't review the code well enough myself). But we also share
the busy list! The busy_list must be queue private, or we need a
block_queue_tag covering lock as well.
So we have to move the busy_list to the queue. This'll work fine, and
it'll actually also fix a problem with blk_queue_invalidate_tags() which
will invalidate tags across all shared queues. This is a bit confusing,
the low level driver should call it for each queue seperately since
otherwise you cannot kill tags on just a single queue for eg a hard
drive that stops responding. Since the function has no callers
currently, it's not an issue.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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On certain device/controller combination, 0xff status is asserted
after reset and doesn't get cleared during 150ms post-reset wait. As
0xff status is interpreted as no device (for good reasons), this can
lead to misdetection on such cases.
This patch implements ata_wait_after_reset() which replaces the 150ms
sleep and waits upto ATA_TMOUT_FF_WAIT if status is 0xff.
ATA_TMOUT_FF_WAIT is currently 800ms which is enough for
HHD424020F7SV00 to get detected but not enough for Quantum GoVault
drive which is known to take upto 2s.
Without parallel probing, spending 2s on 0xff port would incur too
much delay on ata_piix's which use 0xff to indicate empty port and
doesn't have SCR register, so GoVault needs to wait till parallel
probing.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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ATA devices in SLEEP mode don't respond to any commands. SRST is
necessary to wake it up. Till now, when a command is issued to a
device in SLEEP mode, the command times out, which makes EH reset the
device and retry the command after that, causing a long delay.
This patch makes libata track SLEEP state and issue SRST automatically
if a command is about to be issued to a device in SLEEP.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Bruce Allen <ballen@gravity.phys.uwm.edu>
Cc: Andrew Paprocki <andrew@ishiboo.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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Clean up: fix a mixed sign comparison in sg_init_table() accidentally
introduced by commit d6ec0842. The sign of the loop index variable
should match the sign of the "nents" argument.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
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Clean up: fix a mixed sign comparison in sg_last() accidentally
introduced by commit 70eb8040. The sign of the loop index variable
should match the sign of the "nents" argument.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
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Since we are using the last entry in the list, clear any possible
termination bit that may have already been set. Pointed out by Rusty.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Fix fallout from commit b45d9147f1582333e180e1023624c003874b7312
("mv643xx_eth: Remove unused register defines")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This reverts commit 6442eea937ef797d4b66733f49c82e2fdc2aca6f.
The patch breaks smp_ops and needs to be reverted. The solution to
allow modular build of KVM is to export smp_ops instead.
Pointed-out-by: James Bottomley
<jejb> tglx, so write out 100 times "voyager is a useful architecture" ...
<tglx> yes, Sir
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC32]: Fix build-warning in io-unit.c
[SPARC64]: Fix BACKOFF_SPIN on non-SMP.
[SPARC32]: __inline__ --> inline
[SPARC64]: __inline__ --> inline
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It can't be just empty, it has to at least branch
back to 'label'.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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It is not safe to to place struct pernet_operations in a special section.
We need struct pernet_operations to last until we call unregister_pernet_subsys.
Which doesn't happen until module unload.
So marking struct pernet_operations is a disaster for modules in two ways.
- We discard it before we call the exit method it points to.
- Because I keep struct pernet_operations on a linked list discarding
it for compiled in code removes elements in the middle of a linked
list and does horrible things for linked insert.
So this looks safe assuming __exit_refok is not discarded
for modules.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (32 commits)
[NetLabel]: correct usage of RCU locking
[TCP]: fix D-SACK cwnd handling
[NET] napi: use non-interruptible sleep in napi_disable
[SCTP] net/sctp/auth.c: make 3 functions static
[TCP]: Add missing I/O AT code to ipv6 side.
[SCTP]: #if 0 sctp_update_copy_cksum()
[INET]: Unexport icmpmsg_statistics
[NET]: Unexport sock_enable_timestamp().
[TCP]: Make tcp_match_skb_to_sack() static.
[IRDA]: Make ircomm_tty static.
[NET] fs/proc/proc_net.c: make a struct static
[NET] dev_change_name: ignore changes to same name
[NET]: Document some simple rules for actions
[NET_CLS_ACT]: Use skb_act_clone
[NET_CLS_ACT]: Introduce skb_act_clone
[TCP]: Fix scatterlist handling in MD5 signature support.
[IPSEC]: Fix scatterlist handling in skb_icv_walk().
[IPSEC]: Add missing sg_init_table() calls to ESP.
[CRYPTO]: Initialize TCRYPT on-stack scatterlist objects correctly.
[CRYPTO]: HMAC needs some more scatterlist fixups.
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[PATCH] De-constify sched.h
This reverts commit a8972ccf00b7184a743eb6cd9bc7f3443357910c ("sched:
constify sched.h")
1) Patch doesn't change any code here, so gcc is already smart enough
to "feel" constness in such simple functions.
2) There is no such thing as const task_struct. Anyone who think
otherwise deserves compiler warning.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The current napi_disable() uses msleep_interruptible() but doesn't
(and can't) exit in case there's a signal, thus ending up doing a
hot spin without a cpu_relax. Use uninterruptible sleep instead.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch makes three needlessly global functions static.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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sctp_update_copy_cksum() is no longer used.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ircomm_tty can now become static.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Reworked skb_clone looks uglier with the single ifdef
CONFIG_NET_CLS_ACT This patch introduces skb_act_clone which will
replace skb_clone in tc actions
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
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UDP currently uses skb->dev->ifindex which may provide the wrong
information when the socket bound to a specific interface.
This patch makes inet_iif() accessible to UDP and makes UDP use it.
The scenario we are trying to fix is when a client is running on
the same system and the server and both client and server bind to
a non-loopback device.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Acked-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Coding style cleanups:
- change __inline__ to inline;
- drop space in "* addr" parameters;
- drop space between func. name and '('
The "volatile" keywords are correct according to email from one
Linus Torvalds.
[Several other arches need some of this also.]
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Use duplicated inline functions for test_and_set_bit_lock() on x86
instead of #define macros, thus avoiding a bad example. This allows
kernel-doc to run cleanly instead of terminating with an error:
Error(linux-2.6.24-rc1//include/asm-x86/bitops_32.h:188): cannot understand prototype: 'test_and_set_bit_lock test_and_set_bit '
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
[IPV4]: Explicitly call fib_get_table() in fib_frontend.c
[NET]: Use BUILD_BUG_ON in net/core/flowi.c
[NET]: Remove in-code externs for some functions from net/core/dev.c
[NET]: Don't declare extern variables in net/core/sysctl_net_core.c
[TCP]: Remove unneeded implicit type cast when calling tcp_minshall_update()
[NET]: Treat the sign of the result of skb_headroom() consistently
[9P]: Fix missing unlock before return in p9_mux_poll_start
[PKT_SCHED]: Fix sch_prio.c build with CONFIG_NETDEVICES_MULTIQUEUE
[IPV4] ip_gre: sendto/recvfrom NBMA address
[SCTP]: Consolidate sctp_ulpq_renege_xxx functions
[NETLINK]: Fix ACK processing after netlink_dump_start
[VLAN]: MAINTAINERS update
[DCCP]: Implement SIOCINQ/FIONREAD
[NET]: Validate device addr prior to interface-up
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* 'sg' of git://git.kernel.dk/linux-2.6-block:
fix sg_phys to use dma_addr_t
ub: add sg_init_table for sense and read capacity commands
x86: pci-gart fix
blackfin: fix sg fallout
xtensa: dma-mapping.h is using linux/scatterlist.h functions, so include it
SG: audit of drivers that use blk_rq_map_sg()
arch/um/drivers/ubd_kern.c: fix a building error
SG: Change sg_set_page() to take length and offset argument
AVR32: Fix sg_page breakage
mmc: sg fallout
m68k: sg fallout
More SG build fixes
sg: add missing sg_init_table calls to zfcp
SG build fix
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* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest:
lguest: documentation update
lguest: Add to maintainers file.
lguest: build fix
lguest: clean up lguest_launcher.h
lguest: remove unused "wake" element from struct lguest
lguest: use defines from x86 headers instead of magic numbers
lguest: example launcher header cleanup.
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git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
[netdrvr] forcedeth: add MCP77 device IDs
rndis_host: reduce MTU instead of refusing to talk to devices with low max packet size
cpmac: update to new fixed phy driver interface
cpmac: convert to napi_struct interface
cpmac: use print_mac() instead of MAC_FMT
natsemi: fix oops, link back netdevice from private-struct
ehea: fix port_napi_disable/enable
bonding/bond_main.c: fix cut'n'paste error
make bonding/bond_main.c:bond_deinit() static
drivers/net/ipg.c: cleanups
remove Documentation/networking/net-modules.txt
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