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Conflicts:
arch/arm/mach-at91/gpio.c
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Guennadi Liakhovetski noticed that the end condition for the loop in
bitmap_find_free_region() is wrong, and the "return if error" was also
using the wrong conditional that would only trigger if the bitmap was an
exact multiple of the allocation size, which is not necessarily the case
with dma_alloc_from_coherent().
Such a failure would end up in bitmap_find_free_region() accessing
beyond the end of the bitmap.
Reported-by: Guennadi Liakhovetski <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Impact: cleanup
The naming clashes with upcoming softirq tracepoints, so rename the
APIs to lockdep_*().
Requested-by: Steven Rostedt <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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We moved the netlink attribute support from net to lib in order
for it to be available for general consumption. However, parts
of the code (the bits that we don't need :) really depends on
NET because the target object is sk_buff.
This patch fixes this by wrapping them in CONFIG_NET.
Some EXPORTs have been moved to make this work.
Tested-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
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Fix a problem in the IDR system, where an idr_remove_all() hands a data
element to call_rcu() (via free_layer()) before making that data element
inaccessible to new readers. This is very bad, and results in readers
still having a reference to this data element at the end of the grace
period.
Tests on large machines that concurrently map and unmap user-space memory
within the same multithreaded process result in crashes within about five
minutes. Applying this patch increases the kernel's longevity to the
three-to-eight-hour range.
There appear to be other similar problems in idr_get_empty_slot() and
sub_remove(), but I fixed the easy one in idr_remove_all() first. It is
therefore no surprise that failures still occur.
Located-by: Milton Miller II <[email protected]>
Tested-by: Milton Miller II <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Cc: Manfred Spraul <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Sitsofe Wheeler found and bisected that while unifying the
vsprintf format decoding in:
fef20d9: vsprintf: unify the format decoding layer for its 3 users
The sign flag has been dropped out in favour of
precise types (ie: LONG/ULONG).
But the format helper number() still needs this flag to keep track of
the signedness unless it will consider all numbers as unsigned.
Also add an explicit cast to int (for %d) while parsing with va_arg()
to ensure the highest bit is well extended on the 64 bits number that
hosts the value in case of negative values.
Reported-Bisected-Tested-by: Sitsofe Wheeler <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Lai Jiangshan <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Linus Torvalds <[email protected]>
LKML-Reference: <20090309201503.GA5010@nowhere>
Signed-off-by: Ingo Molnar <[email protected]>
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'tracing/textedit' into tracing/core
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An new optimization is making its way to ftrace. Its purpose is to
make trace_printk() consuming less memory and be faster.
Written by Lai Jiangshan, the approach is to delay the formatting
job from tracing time to output time.
Currently, a call to trace_printk() will format the whole string and
insert it into the ring buffer. Then you can read it on /debug/tracing/trace
file.
The new implementation stores the address of the format string and
the binary parameters into the ring buffer, making the packet more compact
and faster to insert.
Later, when the user exports the traces, the format string is retrieved
with the binary parameters and the formatting job is eventually done.
The new implementation rewrites a lot of format decoding bits from
vsnprintf() function, making now 3 differents functions to maintain
in their duplicated parts of printf format decoding bits.
Suggested by Ingo Molnar, this patch tries to factorize the most
possible common bits from these functions.
The real common part between them is the format decoding. Although
they do somewhat similar jobs, their way to export or import the parameters
is very different. Thus, only the decoding layer is extracted, unless you see
other parts that could be worth factorized.
Changes in V2:
- Address a suggestion from Linus to group the format_decode() parameters inside
a structure.
Changes in v3:
- Address other cleanups suggested by Ingo and Linus such as passing the
printf_spec struct to the format helpers: pointer()/number()/string()
Note that this struct is passed by copy and not by address. This is to
avoid side effects because these functions often change these values and the
changes shoudn't be persistant when a callee helper returns.
It would be too risky.
- Various cleanups (code alignement, switch/case instead of if/else fountains).
- Fix a bug that printed the first format specifier following a %p
Changes in v4:
- drop unapropriate const qualifier loss while casting fmt to a char *
(thanks to Vegard Nossum for having pointed this out).
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Linus Torvalds <[email protected]>
Acked-by: Steven Rostedt <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Impact: add new APIs for binary trace printk infrastructure
vbin_printf(): write args to binary buffer, string is copied
when "%s" is occurred.
bstr_printf(): read from binary buffer for args and format a string
[[email protected]: rebase]
Signed-off-by: Lai Jiangshan <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Linus Torvalds <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Conflicts:
arch/x86/Kconfig
block/blktrace.c
kernel/irq/handle.c
Semantic conflict:
kernel/trace/blktrace.c
Signed-off-by: Ingo Molnar <[email protected]>
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Impact: cleanup
Use test_tsk_need_resched(), set_tsk_need_resched(), need_resched()
instead of using TIF_NEED_RESCHED.
Signed-off-by: Lai Jiangshan <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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Impact: add debug callbacks for dma_sync_sg_* functions
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add debug callbacks for dma_sync_single_range_for_* functions
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add debug callbacks for dma_sync_single_for_* functions
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add debug callbacks for dma_[alloc|free]_coherent
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add debug callbacks for dma_{un}map_sg
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add debug callbacks for dma_{un}map_[page|single]
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add functions to check on dma unmap and sync
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add debugfs interface for configuring DMA-API debugging
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add dma_debug= and dma_debug_entries= kernel parameters
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add code to initialize dma-debug core data structures
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add allocator code for struct dma_debug_entry
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: implement necessary functions for the core hash
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add groundwork for DMA-API debugging
Signed-off-by: Joerg Roedel <[email protected]>
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Impact: add a Kconfig entry for DMA-API debugging
Signed-off-by: Joerg Roedel <[email protected]>
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Require framepointers for x86, because otherwise we'll be having
empty stack traces, which is useless.
Signed-off-by: Peter Zijlstra <[email protected]>
LKML-Reference: <1236167295.5330.7240.camel@laptop>
Signed-off-by: Ingo Molnar <[email protected]>
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Netlink attribute parsing may be used even if CONFIG_NET is not set.
Move it from net/netlink to lib and control its inclusion based on the new
config symbol CONFIG_NLATTR, which is selected by CONFIG_NET.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Acked-by: David S. Miller <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
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'x86/setup-lzma', 'x86/signal' and 'x86/urgent' into x86/core
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While trying to debug why my Atom netbook is falling over booting
rawhide debug-enabled kernels, I stumbled across the fact that we've
been enabling object debugging by default. However, once you default it
to on, you've got no way to turn it back off again at runtime.
Add a boolean toggle to turn it off. I would just make it an int
module_param, however people may already expect the boolean enable
behaviour, so just add an analogue for disabling.
Signed-off-by: Kyle McMartin <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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BUILD_DOCSRC should be controlled by "config" instead of "menuconfig".
I have no idea how I managed to use "menuconfig" here.
Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Impact: Bugfix, avoids kernels which build but panic on boot
Fix a bug in decompress.c : only scanned until the first
non-configured compressor (with disastrous result especially if that
was gzip.)
Signed-off-by: Alain Knaff <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
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This patch also makes the frame pointer default to y only if
!ARM_UNWIND. LOCKDEP no longer selects FRAME_POINTER if ARM_UNWIND is
enabled.
Signed-off-by: Catalin Marinas <[email protected]>
Signed-off-by: Russell King <[email protected]>
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The lmb_dump_all() output didn't include the RMO size, which is
interesting on powerpc. The output was also a bit spacey and not well
aligned, and didn't show you the end addresses.
Signed-off-by: Michael Ellerman <[email protected]>
Acked-by: David S. Miller <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
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Currently, netlink_broadcast() reports errors to the caller if no
messages at all were delivered:
1) If, at least, one message has been delivered correctly, returns 0.
2) Otherwise, if no messages at all were delivered due to skb_clone()
failure, return -ENOBUFS.
3) Otherwise, if there are no listeners, return -ESRCH.
With this patch, the caller knows if the delivery of any of the
messages to the listeners have failed:
1) If it fails to deliver any message (for whatever reason), return
-ENOBUFS.
2) Otherwise, if all messages were delivered OK, returns 0.
3) Otherwise, if no listeners, return -ESRCH.
In the current ctnetlink code and in Netfilter in general, we can add
reliable logging and connection tracking event delivery by dropping the
packets whose events were not successfully delivered over Netlink. Of
course, this option would be settable via /proc as this approach reduces
performance (in terms of filtered connections per seconds by a stateful
firewall) but providing reliable logging and event delivery (for
conntrackd) in return.
This patch also changes some clients of netlink_broadcast() that
may report ENOBUFS errors via printk. This error handling is not
of any help. Instead, the userspace daemons that are listening to
those netlink messages should resync themselves with the kernel-side
if they hit ENOBUFS.
BTW, netlink_broadcast() clients include those that call
cn_netlink_send(), nlmsg_multicast() and genlmsg_multicast() since they
internally call netlink_broadcast() and return its error value.
Signed-off-by: Pablo Neira Ayuso <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Impact: fix debug_smp_processor_id() for CONFIG_CPUMASK_OFFSTACK=y
The scheduler now uses the new cpumask API, which deals up to
nr_cpumask_bits, whereas the API used NR_CPUS bits.
If CONFIG_CPUMASK_OFFSTACK=y these two are not equal, so the top bits
are undefined. Leading to bug 12518 "BUG: using smp_processor_id() in
preemptible [00000000] code: dellWirelessCtl/..."
The fix is simple: use the modern API in the check.
Signed-off-by: Rusty Russell <[email protected]>
Signed-off-by: Mike Travis <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
debugobjects: add and use INIT_WORK_ON_STACK
rcu: remove duplicate CONFIG_RCU_CPU_STALL_DETECTOR
relay: fix lock imbalance in relay_late_setup_files
oprofile: fix uninitialized use of struct op_entry
rcu: move Kconfig menu
softlock: fix false panic which can occur if softlockup_thresh is reduced
rcu: add __cpuinit to rcu_init_percpu_data()
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