Journal writes need to be marked FUA, not just REQ_FLUSH. And btree node
writes have... weird ordering requirements.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Mention udev autoregistration, symlinks. Write down some sysfs paths.
Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Now that we're tracking dirty data per stripe, we can add two
optimizations for raid5/6:
* If a stripe is already dirty, force writes to that stripe to
writeback mode - to help build up full stripes of dirty data
* When flushing dirty data, preferentially write out full stripes first
if there are any.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
To make background writeback aware of raid5/6 stripes, we first need to
track the amount of dirty data within each stripe - we do this by
breaking up the existing sectors_dirty into per stripe atomic_ts
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Previously, dirty_data wouldn't get initialized until the first garbage
collection... which was a bit of a problem for background writeback (as
the PD controller keys off of it) and also confusing for users.
This is also prep work for making background writeback aware of raid5/6
stripes.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
The old lazy sorting code was kind of hacky - rewrite in a way that
mathematically makes more sense; the idea is that the size of the sets
of keys in a btree node should increase by a more or less fixed ratio
from smallest to biggest.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Old gcc doesnt like the struct hack, and it is kind of ugly. So finish
off the work to convert pr_debug() statements to tracepoints, and delete
pkey()/pbtree().
Signed-off-by: Kent Overstreet <koverstreet@google.com>
The tracepoints were reworked to be more sensible, and fixed a null
pointer deref in one of the tracepoints.
Converted some of the pr_debug()s to tracepoints - this is partly a
performance optimization; it used to be that with DEBUG or
CONFIG_DYNAMIC_DEBUG pr_debug() was an empty macro; but at some point it
was changed to an empty inline function.
Some of the pr_debug() statements had rather expensive function calls as
part of the arguments, so this code was getting run unnecessarily even
on non debug kernels - in some fast paths, too.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
The most significant change is that btree reads are now done
synchronously, instead of asynchronously and doing the post read stuff
from a workqueue.
This was originally done because we can't block on IO under
generic_make_request(). But - we already have a mechanism to punt cache
lookups to workqueue if needed, so if we just use that we don't have to
deal with the complexity of doing things asynchronously.
The main benefit is this makes the locking situation saner; we can hold
our write lock on the btree node until we're finished reading it, and we
don't need that btree_node_read_done() flag anymore.
Also, for writes, btree_write() was broken out into btree_node_write()
and btree_leaf_dirty() - the old code with the boolean argument was dumb
and confusing.
The prio_blocked mechanism was improved a bit too, now the only counter
is in struct btree_write, we don't mess with transfering a count from
struct btree anymore.
This required changing garbage collection to block prios at the start
and unblock when it finishes, which is cleaner than what it was doing
anyways (the old code had mostly the same effect, but was doing it in a
convoluted way)
And the btree iter btree_node_read_done() uses was converted to a real
mempool.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
An old version of gcc was complaining about using a const int as the
size of a stack allocated array. Which should be fine - but using
ARRAY_SIZE() is better, anyways.
Also, refactor the code to use scnprintf().
Signed-off-by: Kent Overstreet <koverstreet@google.com>
bio_alloc_bioset returns NULL on failure. This fix adds a missing check
for potential NULL pointer dereferencing.
Signed-off-by: Kumar Amit Mehta <gmate.amit@gmail.com>
Signed-off-by: Kent Overstreet <koverstreet@google.com>
These are two fixes that came in this week, one for a regression we
introduced in 3.10 in the GIC interrupt code, and the other one
fixes a typo in newly introduced code.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=+4ED
-----END PGP SIGNATURE-----
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"These are two fixes that came in this week, one for a regression we
introduced in 3.10 in the GIC interrupt code, and the other one fixes
a typo in newly introduced code"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
irqchip: gic: call gic_cpu_init() as well in CPU_STARTING_FROZEN case
ARM: dts: Correct the base address of pinctrl_3 on Exynos5250
Here's a single patch for the firmware core that resolves a reported
oops in the firmware core that people have been hitting.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
iEYEABECAAYFAlHFtG4ACgkQMUfUDdst+ymcGgCfcsj0HM+lYhuW/EFZNZ9hp/Vx
wJQAoKOjpvkZ5fAFYcEkI+MfsorlqI8+
=FtZ1
-----END PGP SIGNATURE-----
Merge tag 'driver-core-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fix from Greg Kroah-Hartman:
"Here's a single patch for the firmware core that resolves a reported
oops in the firmware core that people have been hitting."
* tag 'driver-core-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
firmware loader: fix use-after-free by double abort
Here are two USB patches for 3.10. One updates the Kconfig wording for
CONFIG_USB_PHY to make it, hopefully, more obvious what this option is
(I know you complained about this when it hit the tree.) The other is a
new device id for a driver.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
iEYEABECAAYFAlHFtA4ACgkQMUfUDdst+yk3SQCfXxifjrrW5FRaowwCZJgyxtl7
+GsAni2/z2IPYrAoEfIHIZaP8zURlEyu
=wce+
-----END PGP SIGNATURE-----
Merge tag 'usb-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg Kroah-Hartman:
"Here are two USB patches for 3.10.
One updates the Kconfig wording for CONFIG_USB_PHY to make it,
hopefully, more obvious what this option is (I know you complained
about this when it hit the tree.) The other is a new device id for a
driver"
* tag 'usb-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: serial: ti_usb_3410_5052: new device id for Abbot strip port cable
usb: phy: Improve Kconfig help for CONFIG_USB_PHY
Here are two tty core fixes that resolve some regressions that have been
reported recently. Both tiny fixes, but needed.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
iEYEABECAAYFAlHFtMUACgkQMUfUDdst+yn7IwCfaUgbuu7fzLLhNm8faXgptLhF
BhsAoLjaWndDUDCoo5er3OgF27V2z7ec
=Slk/
-----END PGP SIGNATURE-----
Merge tag 'tty-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pul tty fixes from Greg Kroah-Hartman:
"Here are two tty core fixes that resolve some regressions that have
been reported recently. Both tiny fixes, but needed"
* tag 'tty-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: Fix transient pty write() EIO
tty/vt: Return EBUSY if deallocating VT1 and it is busy
Pull SCSI target fixes from Nicholas Bellinger:
"Included is the recent tcm_qla2xxx residual underrun length fix from
Roland, along with Joern's iscsi-target patch for session_lock
breakage within iscsit_stop_time2retain_timer() code. Both are CC'ed
to stable.
The remaining two are specific to recent iscsi-target + iser
conversion changes. One drops some left-over debug noise, and Andy's
patch fixes configfs attribute handling during an explicit network
portal feature bit disable when iser-target is unsupported."
* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
iscsi-target: Remove left over v3.10-rc debug printks
target/iscsi: Fix op=disable + error handling cases in np_store_iser
tcm_qla2xxx: Fix residual for underrun commands that fail
target/iscsi: don't corrupt bh_count in iscsit_stop_time2retain_timer()
Pull media fixes from Mauro Carvalho Chehab:
"Another set of fixes for Kernel 3.10.
This series contain:
- two Kbuild fixes for randconfig
- a buffer overflow when using rtl28xuu with r820t tuner
- one clk fixup on exynos4-is driver"
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] Fix build when drivers are builtin and frontend modules
[media] s5p makefiles: don't override other selections on obj-[ym]
[media] exynos4-is: Fix FIMC-IS clocks initialization
[media] rtl28xxu: fix buffer overflow when probing Rafael Micro r820t tuner
Pull vfs fixes from Al Viro:
"Several fixes for bugs caught while looking through f_pos (ab)users"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
aout32 coredump compat fix
splice: don't pass the address of ->f_pos to methods
mconsole: we'd better initialize pos before passing it to vfs_read()...
dump_seek() does SEEK_CUR, not SEEK_SET; native binfmt_aout
handles it correctly (seeks by PAGE_SIZE - sizeof(struct user),
getting the current position to PAGE_SIZE), compat one seeks
by PAGE_SIZE and ends up at PAGE_SIZE + already written...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull x86 fixes from Peter Anvin:
"This series fixes a couple of build failures, and fixes MTRR cleanup
and memory setup on very specific memory maps.
Finally, it fixes triggering backtraces on all CPUs, which was
inadvertently disabled on x86."
* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/efi: Fix dummy variable buffer allocation
x86: Fix trigger_all_cpu_backtrace() implementation
x86: Fix section mismatch on load_ucode_ap
x86: fix build error and kconfig for ia32_emulation and binfmt
range: Do not add new blank slot with add_range_with_merge
x86, mtrr: Fix original mtrr range get for mtrr_cleanup
Pull drm radeon fixes from Dave Airlie:
"One core fix, but mostly radeon fixes for s/r and big endian UVD
support, and a fix to stop the GPU being reset for no good reason, and
crashing people's machines."
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/radeon: update lockup tracking when scheduling in empty ring
drm/prime: Honor requested file flags when exporting a buffer
drm/radeon: fix UVD on big endian
drm/radeon: fix write back suspend regression with uvd v2
drm/radeon: do not try to uselessly update virtual memory pagetable
- Fix for a regression causing a failure to turn on some devices on
some systems during initialization introduced by a recent revert of
an ACPI PM change that broke something else.
- ACPI power resources initialization fix preventing a NULL pointer
from being dereferenced in the acpi_add_power_resource() error code
path.
- ACPI dock station driver fix that adds missing locking to
write_undock().
- ACPI resources allocation fix changing the scope of an old
workaround so that it doesn't affect systems that aren't actually
buggy.
/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)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=V0L1
-----END PGP SIGNATURE-----
Merge tag 'acpi-3.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
- Fix for a regression causing a failure to turn on some devices on
some systems during initialization introduced by a recent revert of
an ACPI PM change that broke something else. Fortunately, we know
exactly what devices are affected, so we can add a fix just for them
leaving everyone else alone.
- ACPI power resources initialization fix preventing a NULL pointer
from being dereferenced in the acpi_add_power_resource() error code
path.
- ACPI dock station driver fix that adds missing locking to
write_undock().
- ACPI resources allocation fix changing the scope of an old workaround
so that it doesn't affect systems that aren't actually buggy. This
was reported a couple of days ago to fix DMA problems on some new
platforms so we need it in -stable. From Mika Westerberg.
* tag 'acpi-3.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / LPSS: Power up LPSS devices during enumeration
ACPI / PM: Fix error code path for power resources initialization
ACPI / dock: Take ACPI scan lock in write_undock()
ACPI / resources: call acpi_get_override_irq() only for legacy IRQ resources
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.13 (GNU/Linux)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=yGPS
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"Three one-line fixes for my first pull request; one for x86 host, one
for x86 guest, one for PPC"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
x86: kvmclock: zero initialize pvclock shared memory area
kvm/ppc/booke: Delay kvmppc_lazy_ee_enable
KVM: x86: remove vcpu's CPL check in host-invoked XCR set
Pull crypto fix from Herbert Xu:
"This fixes an unaligned crash in XTS mode when using aseni_intel"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: aesni_intel - fix accessing of unaligned memory
Pull Ceph fix from Sage Weil:
"This fixes a problem preventing the kernel and userland librbd
libraries from sharing data with the new format 2 images"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
rbd: use the correct length for format 2 object names
to initiate garbage collection. Also, free the kernel memory when
we're done with it instead of leaking - Ben Hutchings
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.13 (GNU/Linux)
iQIcBAABAgAGBQJRxCKWAAoJEC84WcCNIz1VIDcP/icYJSdXw/fKUgCG9+zAk3FE
xivUa6aJKG+GBL4Cg2VYTJ/sBDA1v0xdFcf73amCdTcWuor6ha5LxrYFwFhhKtYk
3O05spiCZ+F6nveZTrrxqKce3cN5XOYwbF8bZOAuJYmjaTvZQ0Cb89zf/asC4+Fx
ui6HCRmCy6nUy5Fn4A7fBHlTyuOE4xZXvZjOUXWGiUwmZK/SbHYtN1+4nXBTnAWF
yDcB8fkl4v7cYLIl9U8dc7Dg8ita4bj6F8RRNJf2WXipsOpMoMRtiua8VLCZ0ECc
9cpONx7wMQS5nDEfNefWm4vdqS8PEG1CkZ8tN37nIU/AlTi6mTyTqZv0ICQfgVna
6nChmkz9uxvzTzlMlOR5eGBu68xQLiyHhauTJBpMkwOp4q4gg/Ui+bhV7Vo9ySF3
DlrSekT0Uo1PLgdAUYg7+hZhN98HGHoGSEx7FsymOjqlY3nF+4k7ZeTerEI4vI2D
zqyj5QVWqS/M9zj1ojUu3nFDNhfQHO4PvVt9O8ca4/IJS1pbb/J8qtwIOFTNdJHf
2Iyk6GnT9UaKvOs4trWXmPjiZkBcS8JdQH80fDSIgIxLhwOQksT+q90TY5h3mAED
Hwm9JywXlxpFncPixAkpoorqDWSZmBTmUw9JR0FQNTFGuENPA0SGn51P2gGbTA+e
82ECeWRXMMoYA/qNxMI2
=kfTf
-----END PGP SIGNATURE-----
Merge tag 'efi-urgent' into x86/urgent
* Don't leak random kernel memory to EFI variable NVRAM when attempting
to initiate garbage collection. Also, free the kernel memory when
we're done with it instead of leaking - Ben Hutchings
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
1. Check for allocation failure
2. Clear the buffer contents, as they may actually be written to flash
3. Don't leak the buffer
Compile-tested only.
[ Tested successfully on my buggy ASUS machine - Matt ]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Writing 0 when iser was not previously enabled, so succeed but do
nothing so that user-space code doesn't need a try: catch block
when ib_isert logic is not available.
Also, return actual error from add_network_portal using PTR_ERR
during op=enable failure.
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
One user visible fix to stop misreport GPU hangs and subsequent resets.
* 'drm-fixes-3.10' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: update lockup tracking when scheduling in empty ring
There might be issue with lockup detection when scheduling on an
empty ring that have been sitting idle for a while. Thus update
the lockup tracking data when scheduling new work in an empty ring.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Tested-by: Andy Lutomirski <luto@amacapital.net>
Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Pull scheduler fixes from Ingo Molnar:
"Two smaller fixes - plus a context tracking tracing fix that is a bit
bigger"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tracing/context-tracking: Add preempt_schedule_context() for tracing
sched: Fix clear NOHZ_BALANCE_KICK
sched/x86: Construct all sibling maps if smt
Pull perf fixes from Ingo Molnar:
"Four fixes. The mmap ones are unfortunately larger than desired -
fuzzing uncovered bugs that needed perf context life time management
changes to fix properly"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86: Fix broken PEBS-LL support on SNB-EP/IVB-EP
perf: Fix mmap() accounting hole
perf: Fix perf mmap bugs
kprobes: Fix to free gone and unused optprobes
Pull cpu idle fixes from Thomas Gleixner:
- Add a missing irq enable. Fallout of the idle conversion
- Fix stackprotector wreckage caused by the idle conversion
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
idle: Enable interrupts in the weak arch_cpu_idle() implementation
idle: Add the stack canary init to cpu_startup_entry()
Pull timer fixes from Thomas Gleixner:
- Fix inconstinant clock usage in virtual time accounting
- Fix a build error in KVM caused by the NOHZ work
- Remove a pointless timekeeping duty assignment which breaks NOHZ
- Use a proper notifier return value to avoid random behaviour
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tick: Remove useless timekeeping duty attribution to broadcast source
nohz: Fix notifier return val that enforce timekeeping
kvm: Move guest entry/exit APIs to context_tracking
vtime: Use consistent clocks among nohz accounting
Pull powerpc fix fro, Benjamin Herrenschmidt:
"We accidentally broke hugetlbfs on Freescale embedded processors which
use a slightly different page table layout than our server processors"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Fix bad pmd error with book3E config
Pull tilepro fix from Chris Metcalf:
"This change allows the older tilepro architecture to be correctly
built by newer gccs, despite a change that caused gcc to start trying
to use an out-of-line implementation for __builtin_ffsll().
This should be inline again starting with gcc 4.7.4 and 4.8.2 or so,
but meanwhile this change keeps things from breaking, with the only
cost being a few bytes of code in the kernel to provide __ffsdi2 even
for compilers that do inline it"
* 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
tilepro: work around module link error with gcc 4.7
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)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=BcrY
-----END PGP SIGNATURE-----
Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
Pull arm64 perf fix from Catalin Marinas:
"Perf fix (user-mode PC recording)"
* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
perf: arm64: Record the user-mode PC in the call chain.
There are a large number of reports that the media build is
not compiling when some drivers are compiled as builtin, while
the needed frontends are compiled as module.
On the last one of such reports:
From: kbuild test robot <fengguang.wu@intel.com>
Subject: saa7134-dvb.c:undefined reference to `zl10039_attach'
The .config file has:
CONFIG_VIDEO_SAA7134=y
CONFIG_VIDEO_SAA7134_DVB=y
# CONFIG_MEDIA_ATTACH is not set
CONFIG_DVB_ZL10039=m
And it produces all those errors:
drivers/built-in.o: In function `set_type':
tuner-core.c:(.text+0x2f263e): undefined reference to `tea5767_attach'
tuner-core.c:(.text+0x2f273e): undefined reference to `tda9887_attach'
drivers/built-in.o: In function `tuner_probe':
tuner-core.c:(.text+0x2f2d20): undefined reference to `tea5767_autodetection'
drivers/built-in.o: In function `av7110_attach':
av7110.c:(.text+0x330bda): undefined reference to `ves1x93_attach'
av7110.c:(.text+0x330bf7): undefined reference to `stv0299_attach'
av7110.c:(.text+0x330c63): undefined reference to `tda8083_attach'
av7110.c:(.text+0x330d09): undefined reference to `ves1x93_attach'
av7110.c:(.text+0x330d33): undefined reference to `tda8083_attach'
av7110.c:(.text+0x330d5d): undefined reference to `stv0297_attach'
av7110.c:(.text+0x330dbe): undefined reference to `stv0299_attach'
drivers/built-in.o: In function `tuner_attach_dtt7520x':
ngene-cards.c:(.text+0x3381cb): undefined reference to `dvb_pll_attach'
drivers/built-in.o: In function `demod_attach_lg330x':
ngene-cards.c:(.text+0x33828a): undefined reference to `lgdt330x_attach'
drivers/built-in.o: In function `demod_attach_stv0900':
ngene-cards.c:(.text+0x3383d5): undefined reference to `stv090x_attach'
drivers/built-in.o: In function `cineS2_probe':
ngene-cards.c:(.text+0x338b7f): undefined reference to `drxk_attach'
drivers/built-in.o: In function `configure_tda827x_fe':
saa7134-dvb.c:(.text+0x346ae7): undefined reference to `tda10046_attach'
drivers/built-in.o: In function `dvb_init':
saa7134-dvb.c:(.text+0x347283): undefined reference to `mt352_attach'
saa7134-dvb.c:(.text+0x3472cd): undefined reference to `mt352_attach'
saa7134-dvb.c:(.text+0x34731c): undefined reference to `tda10046_attach'
saa7134-dvb.c:(.text+0x34733c): undefined reference to `tda10046_attach'
saa7134-dvb.c:(.text+0x34735c): undefined reference to `tda10046_attach'
saa7134-dvb.c:(.text+0x347378): undefined reference to `tda10046_attach'
saa7134-dvb.c:(.text+0x3473db): undefined reference to `tda10046_attach'
drivers/built-in.o:saa7134-dvb.c:(.text+0x347502): more undefined references to `tda10046_attach' follow
drivers/built-in.o: In function `dvb_init':
saa7134-dvb.c:(.text+0x347812): undefined reference to `mt352_attach'
saa7134-dvb.c:(.text+0x347951): undefined reference to `mt312_attach'
saa7134-dvb.c:(.text+0x3479a9): undefined reference to `mt312_attach'
>> saa7134-dvb.c:(.text+0x3479c1): undefined reference to `zl10039_attach'
This is happening because a builtin module can't use directly a symbol
found on a module. By enabling CONFIG_MEDIA_ATTACH, the configuration
becomes valid, as dvb_attach() macro loads the module if needed, making
the symbol available to the builtin module.
While this bug started to appear after the patches that use IS_DEFINED
macro (like changeset 7b34be71db), this
bug is a way ancient than that.
The thing is that, before the IS_DEFINED() patches, the logic used to be:
&& defined(MODULE))
struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe,
u8 i2c_addr,
struct i2c_adapter *i2c);
static inline struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe,
u8 i2c_addr,
struct i2c_adapter *i2c)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
The above code, with the .config file used, was evoluting to FALSE
(instead of TRUE as it should be, as CONFIG_DVB_ZL10039 is 'm'),
and were adding the static inline code at saa7134-dvb, instead
of the external call. So, while it weren't producing any compilation
error, the code weren't working either.
So, as the overhead for using CONFIG_MEDIA_ATTACH is minimal, just
enable it, if MODULES is defined.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Commit c011470 (irqchip: gic: Perform the gic_secondary_init() call via
CPU notifier) moves gic_secondary_init() that used to be called in
.smp_secondary_init hook into a notifier call. But it changes the
system behavior a little bit. Before the commit, gic_cpu_init()
is called not only when kernel brings up the secondary cores but also
when system resuming procedure hot-plugs the cores back to kernel.
While after the commit, the function will not be called in the latter
case, where the 'action' will not be CPU_STARTING but
CPU_STARTING_FROZEN. This behavior difference at least causes the
following suspend/resume regression on imx6q.
$ echo mem > /sys/power/state
PM: Syncing filesystems ... done.
PM: Preparing system for mem sleep
mmc1: card e624 removed
Freezing user space processes ... (elapsed 0.01 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
PM: Entering mem sleep
PM: suspend of devices complete after 5.930 msecs
PM: suspend devices took 0.010 seconds
PM: late suspend of devices complete after 0.343 msecs
PM: noirq suspend of devices complete after 0.828 msecs
Disabling non-boot CPUs ...
CPU1: shutdown
CPU2: shutdown
CPU3: shutdown
Enabling non-boot CPUs ...
CPU1: Booted secondary processor
INFO: rcu_sched detected stalls on CPUs/tasks: { 1 2 3} (detected by 0, t=2102 jiffies, g=4294967169, c=4294967168, q=17)
Task dump for CPU 1:
swapper/1 R running 0 0 1 0x00000000
Backtrace:
[<bf895ff4>] (0xbf895ff4) from [<00000000>] ( (null))
Backtrace aborted due to bad frame pointer <8007ccdc>
Task dump for CPU 2:
swapper/2 R running 0 0 1 0x00000000
Backtrace:
[<8075dbdc>] (0x8075dbdc) from [<00000000>] ( (null))
Backtrace aborted due to bad frame pointer <00000002>
Task dump for CPU 3:
swapper/3 R running 0 0 1 0x00000000
Backtrace:
[<8075dbdc>] (0x8075dbdc) from [<00000000>] ( (null))
Fix the regression by checking 'action' being CPU_STARTING_FROZEN to
have gic_cpu_init() called for secondary cores when system resumes.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The following change fixes the x86 implementation of
trigger_all_cpu_backtrace(), which was previously (accidentally,
as far as I can tell) disabled to always return false as on
architectures that do not implement this function.
trigger_all_cpu_backtrace(), as defined in include/linux/nmi.h,
should call arch_trigger_all_cpu_backtrace() if available, or
return false if the underlying arch doesn't implement this
function.
x86 did provide a suitable arch_trigger_all_cpu_backtrace()
implementation, but it wasn't actually being used because it was
declared in asm/nmi.h, which linux/nmi.h doesn't include. Also,
linux/nmi.h couldn't easily be fixed by including asm/nmi.h,
because that file is not available on all architectures.
I am proposing to fix this by moving the x86 definition of
arch_trigger_all_cpu_backtrace() to asm/irq.h.
Tested via: echo l > /proc/sysrq-trigger
Before the change, this uses a fallback implementation which
shows backtraces on active CPUs (using
smp_call_function_interrupt() )
After the change, this shows NMI backtraces on all CPUs
Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1370518875-1346-1-git-send-email-walken@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
With this change, we no longer lose the innermost entry in the user-mode
part of the call chain. See also the x86 port, which includes the ip,
and the corresponding change in arch/arm.
Signed-off-by: Jed Davis <jld@mozilla.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
