06 May, 2011
1 commit
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This patch adds a multiple message send syscall and is the send
version of the existing recvmmsg syscall. This is heavily
based on the patch by Arnaldo that added recvmmsg.I wrote a microbenchmark to test the performance gains of using
this new syscall:http://ozlabs.org/~anton/junkcode/sendmmsg_test.c
The test was run on a ppc64 box with a 10 Gbit network card. The
benchmark can send both UDP and RAW ethernet packets.64B UDP
batch pkts/sec
1 804570
2 872800 (+ 8 %)
4 916556 (+14 %)
8 939712 (+17 %)
16 952688 (+18 %)
32 956448 (+19 %)
64 964800 (+20 %)64B raw socket
batch pkts/sec
1 1201449
2 1350028 (+12 %)
4 1461416 (+22 %)
8 1513080 (+26 %)
16 1541216 (+28 %)
32 1553440 (+29 %)
64 1557888 (+30 %)We see a 20% improvement in throughput on UDP send and 30%
on raw socket send.[ Add sparc syscall entries. -DaveM ]
Signed-off-by: Anton Blanchard
Signed-off-by: David S. Miller
22 Apr, 2011
1 commit
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mac-fec.c was setting individual UDP address registers instead of multicast
group address registers when joining a multicast group.
This prevented from correctly receiving UDP multicast packets.
According to datasheet, replaced hash_table_high and hash_table_low
with grp_hash_table_high and grp_hash_table_low respectively.
Also renamed hash_table_* with grp_hash_table_* in struct fec declaration
for 8xx: these registers are used only for multicast there.Tested on a MPC5121 based board.
Build tested also against mpc866_ads_defconfig.Signed-off-by: Andrea Galbusera
Signed-off-by: David S. Miller
08 Apr, 2011
1 commit
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* 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6:
Fix common misspellings
01 Apr, 2011
8 commits
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Instead, keep it static, expose an accessor and use that from
the PowerMac code. Avoids easy namespace collisions and will
make it easier to consolidate with other implementations.Signed-off-by: Benjamin Herrenschmidt
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This allows us to stop abusing smp_ops->setup_cpu() for cleanup
tasks that have to take place after the initial boot time CPU
bringup.Signed-off-by: Benjamin Herrenschmidt
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The current code soft-disables, and then goes to NAP mode which
turns interrupts on. That means that if an interrupt occurs, we
will hit the masked interrupt code path which isn't what we want,
as it will return with EE off, which will either get us out of
NAP mode, or fail to enter it (according to spec).Instead, let's just rely on the fact that it is safe to take
decrementer interrupts on an offline CPU and leave interrupts
enabled. We can also get rid of the special case in asm for
power4_cpu_offline_powersave() and just use power4_idle().Signed-off-by: Benjamin Herrenschmidt
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Signed-off-by: Benjamin Herrenschmidt
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Use generic cpu_state, call idle_task_exit() properly, and
remove smp_core99_cpu_die() which isn't useful, the generic
function does the job just fine. -
Remove the last remnants of cpu_enable(), everybody uses the normal
__cpu_up() path nowSigned-off-by: Benjamin Herrenschmidt
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Nobody uses it, besides we should always use the normal __cpu_up
path anywaysSigned-off-by: Benjamin Herrenschmidt
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Various thing are torn down when a CPU is hot-unplugged. That CPU
is expected to go back to start_secondary when re-plugged to re
initialize everything, such as clock sources, maps, ...Some implementations just return from cpu_die() callback
in the idle loop when the CPU is "re-plugged". This is not enough.We fix it using a little asm trampoline which resets the stack
and calls back into start_secondary as if we were all fresh from
boot. The trampoline already existed on ppc64, but we add it for
ppc32Signed-off-by: Benjamin Herrenschmidt
31 Mar, 2011
2 commits
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Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi
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…git/tip/linux-2.6-tip
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
avr32: Fix missing irq namespace conversion
powerpc: qe_ic: Rename get_irq_desc_data and get_irq_desc_chip
genirq: Remove the now obsolete config options and select statements
arm: versatile : Fix typo introduced in irq namespace cleanup
sound: Fixup the last user of the old irq functions
genirq: Remove obsolete comment
genirq: Remove now obsolete set_irq_wake()
sh: Fix irq cleanup fallout
x86: apb_timer: Fixup genirq fallout
genirq: Fix misnamed label in handle_edge_eoi_irqFix up crazy conflict in arch/powerpc/include/asm/qe_ic.h:
- commit eead4d5c63ff ("powerpc: qe_ic: Rename get_irq_desc_data and
get_irq_desc_chip") made the helper functions use
irq_desc_get_handler_data() instead of the legacy (and no longer
existing) get_irq_desc_data.- commit d4db35e8dc96 ("powerpc/qe_ic: Fix another breakage from the
irq_data conversion") used irq_desc_get_chip_data() instead.According to Thomas, the former is the correct direct conversion, but it
does look like both should work (arch/powerpc/sysdev/qe_lib/qe_ic.c
seems to initialize both to the same thing), and the chip data in some
ways is the more logical. Somebody should really decide on one of the
other.This merge picks irq_desc_get_handler_data() as the straightforward pure
conversion to new names, as per Thomas.
30 Mar, 2011
7 commits
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These two functions disappeared in commit
0c6f8a8b917ad361319c8ace3e9f28e69bfdb4c1
"genirq: Remove compat code"but they still exist in qe_ic.h.
This patch renames the function to their new names.Signed-off-by: Richard Cochran
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Lennert Buytenhek
Cc: Benjamin Herrenschmidt
LKML-Reference:
Signed-off-by: Thomas Gleixner -
Signed-off-by: Benjamin Herrenschmidt
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Recent upstream builds with allmodconfig fail due to lack of space
between 0x3000 and 0x6000. We have a hard block at 0x7000 but we can
spare a page by moving the STAB0 from 0x6000 to 0x8000.Signed-off-by: Benjamin Herrenschmidt
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These syscalls have been added recently:
name_to_handle_at
open_by_handle_at
clock_adjtime
syncfsSigned-off-by: Stephen Rothwell
Signed-off-by: Benjamin Herrenschmidt -
339 is the SPR number for MAS5 documented by Power ISA 2.06, and
implemented by e500mc. It is not yet used anywhere in the kernel,
so nothing should be relying on the wrong number.Signed-off-by: Varun Sethi
Signed-off-by: Scott Wood
Signed-off-by: Benjamin Herrenschmidt -
pfns are unsigned long, but MEMORY_START is phys_addr_t. This leads
to page_to_pfn() returning phys_addr_t, and thus type mismatches in a few
print statements.Signed-off-by: Scott Wood
Signed-off-by: Benjamin Herrenschmidt -
This is used by Alsa to mmap buffers allocated with dma_alloc_coherent()
into userspace. We need a special variant to handle machines with
non-coherent DMAs as those buffers have "special" virt addresses and
require non-cachable mappingsSigned-off-by: Benjamin Herrenschmidt
24 Mar, 2011
6 commits
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There is no user now.
Signed-off-by: FUJITA Tomonori
Cc: David Miller
Cc: Ralf Baechle
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
minix bit operations are only used by minix filesystem and useless by
other modules. Because byte order of inode and block bitmaps is different
on each architecture like below:m68k:
big-endian 16bit indexed bitmapsh8300, microblaze, s390, sparc, m68knommu:
big-endian 32 or 64bit indexed bitmapsm32r, mips, sh, xtensa:
big-endian 32 or 64bit indexed bitmaps for big-endian mode
little-endian bitmaps for little-endian modeOthers:
little-endian bitmapsIn order to move minix bit operations from asm/bitops.h to architecture
independent code in minix filesystem, this provides two config options.CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k.
CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which use
native byte order bitmaps (h8300, microblaze, s390, sparc, m68knommu,
m32r, mips, sh, xtensa). The architectures which always use little-endian
bitmaps do not select these options.Finally, we can remove minix bit operations from asm/bitops.h for all
architectures.Signed-off-by: Akinobu Mita
Acked-by: Arnd Bergmann
Acked-by: Greg Ungerer
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Cc: Andreas Schwab
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Yoshinori Sato
Cc: Michal Simek
Cc: "David S. Miller"
Cc: Hirokazu Takata
Acked-by: Ralf Baechle
Acked-by: Paul Mundt
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
As the result of conversions, there are no users of ext2 non-atomic bit
operations except for ext2 filesystem itself. Now we can put them into
architecture independent code in ext2 filesystem, and remove from
asm/bitops.h for all architectures.Signed-off-by: Akinobu Mita
Cc: Jan Kara
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce little-endian bit operations by renaming existing powerpc native
little-endian bit operations and changing them to take any pointer types.Signed-off-by: Akinobu Mita
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: "H. Peter Anvin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This makes the little-endian bitops take any pointer types by changing the
prototypes and adding casts in the preprocessor macros.That would seem to at least make all the filesystem code happier, and they
can continue to do just something like#define ext2_set_bit __test_and_set_bit_le
(or whatever the exact sequence ends up being).
Signed-off-by: Akinobu Mita
Cc: Arnd Bergmann
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: "Luck, Tony"
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Matthew Wilcox
Cc: Grant Grundler
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Hirokazu Takata
Cc: "David S. Miller"
Cc: Chris Zankel
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Hans-Christian Egtvedt
Cc: "H. Peter Anvin"
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
As a preparation for providing little-endian bitops for all architectures,
This renames generic implementation of little-endian bitops. (remove
"generic_" prefix and postfix "_le")s/generic_find_next_le_bit/find_next_bit_le/
s/generic_find_next_zero_le_bit/find_next_zero_bit_le/
s/generic_find_first_zero_le_bit/find_first_zero_bit_le/
s/generic___test_and_set_le_bit/__test_and_set_bit_le/
s/generic___test_and_clear_le_bit/__test_and_clear_bit_le/
s/generic_test_le_bit/test_bit_le/
s/generic___set_le_bit/__set_bit_le/
s/generic___clear_le_bit/__clear_bit_le/
s/generic_test_and_set_le_bit/test_and_set_bit_le/
s/generic_test_and_clear_le_bit/test_and_clear_bit_le/Signed-off-by: Akinobu Mita
Acked-by: Arnd Bergmann
Acked-by: Hans-Christian Egtvedt
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Cc: Andreas Schwab
Cc: Greg Ungerer
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Mar, 2011
2 commits
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All architectures can use the common dma_addr_t typedef now. We can
remove the arch specific dma_addr_t.Signed-off-by: FUJITA Tomonori
Acked-by: Arnd Bergmann
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Ivan Kokshaysky
Cc: Richard Henderson
Cc: Matt Turner
Cc: "Luck, Tony"
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Chris Metcalf
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a node parameter to alloc_thread_info(), and change its name to
alloc_thread_info_node()This change is needed to allow NUMA aware kthread_create_on_cpu()
Signed-off-by: Eric Dumazet
Acked-by: David S. Miller
Reviewed-by: Andi Kleen
Acked-by: Rusty Russell
Cc: Tejun Heo
Cc: Tony Luck
Cc: Fenghua Yu
Cc: David Howells
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Mar, 2011
2 commits
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In some cases during a threaded core dump not all the threads will have
a full register set. This happens when the signal causing the core dump
races with a thread exiting. The race happens when the exiting thread
has entered the kernel for the last time before the signal arrives, but
doesn't get far enough through the exit code to avoid being included
in the core dump.So we get a thread included in the core dump which is never going to go
out to userspace again and only has a partial register set recordedNormally we would catch each thread as it is about to go into userspace
and capture the full register set then.However, this exiting thread is never going to go out to userspace
again, so we have no way to capture its full register set. It doesn't
really matter, though, as this is a thread which is effectively
already dead.So instead of hitting a BUG() in this case (a really bad choice of
action in the first place), we use a poison value for the register
values.[BenH]: Some cosmetic/stylistic changes and fix build on ppc32
Signed-off-by: Mike Wolf
Signed-off-by: Benjamin Herrenschmidt -
This property, defined in the Open PIC binding, tells the kernel not to use
the reset bit in the global configuration register. Additionally, its
presence mandates that only sources which are actually used (i.e. appear in
the device tree) should have their VECPRI bits initialized.Although, "pic-no-reset" can be used for the same use cases that
"protected-sources" is covering, the "protected-sources" implementation was
left completely intact. This is a more pragmatic approach as there are
already several existing systems which use protected sources. If
"pic-no-reset" *and* "protected-sources" are both used, however, then
"pic-no-reset" takes precedence in terms of the init behavior and the
sanity checks done by protected sources will still take place.Signed-off-by: Meador Inge
Cc: Hollis Blanchard
Cc: Benjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt
19 Mar, 2011
1 commit
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…/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits)
trace, filters: Initialize the match variable in process_ops() properly
trace, documentation: Fix branch profiling location in debugfs
oprofile, s390: Cleanups
oprofile, s390: Remove hwsampler_files.c and merge it into init.c
perf: Fix tear-down of inherited group events
perf: Reorder & optimize perf_event_context to remove alignment padding on 64 bit builds
perf: Handle stopped state with tracepoints
perf: Fix the software events state check
perf, powerpc: Handle events that raise an exception without overflowing
perf, x86: Use INTEL_*_CONSTRAINT() for all PEBS event constraints
perf, x86: Clean up SandyBridge PEBS events
perf lock: Fix sorting by wait_min
perf tools: Version incorrect with some versions of grep
perf evlist: New command to list the names of events present in a perf.data file
perf script: Add support for H/W and S/W events
perf script: Add support for dumping symbols
perf script: Support custom field selection for output
perf script: Move printing of 'common' data from print_event and rename
perf tracing: Remove print_graph_cpu and print_graph_proc from trace-event-parse
perf script: Change process_event prototype
...
18 Mar, 2011
1 commit
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* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (62 commits)
powerpc/85xx: Fix signedness bug in cache-sram
powerpc/fsl: 85xx: document cache sram bindings
powerpc/fsl: define binding for fsl mpic interrupt controllers
powerpc/fsl_msi: Handle msi-available-ranges better
drivers/serial/ucc_uart.c: Add of_node_put to avoid memory leak
powerpc/85xx: Fix SPE float to integer conversion failure
powerpc/85xx: Update sata controller compatible for p1022ds board
ATA: Add FSL sata v2 controller support
powerpc/mpc8xxx_gpio: simplify searching for 'fsl, qoriq-gpio' compatiable
powerpc/8xx: remove obsolete mgsuvd board
powerpc/82xx: rename and update mgcoge board support
powerpc/83xx: rename and update kmeter1
powerpc/85xx: Workaroudn e500 CPU erratum A005
powerpc/fsl_pci: Add support for FSL PCIe controllers v2.x
powerpc/85xx: Fix writing to spin table 'cpu-release-addr' on ppc64e
powerpc/pseries: Disable MSI using new interface if possible
powerpc: Enable GENERIC_HARDIRQS_NO_DEPRECATED.
powerpc: core irq_data conversion.
powerpc: sysdev/xilinx_intc irq_data conversion.
powerpc: sysdev/uic irq_data conversion.
...Fix up conflicts in arch/powerpc/sysdev/fsl_msi.c (due to getting rid of
of_platform_driver in arch/powerpc)
17 Mar, 2011
3 commits
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* 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6: (21 commits)
tty: serial: altera_jtaguart: Add device tree support
tty: serial: altera_uart: Add devicetree support
dt: eliminate of_platform_driver shim code
dt: Eliminate of_platform_{,un}register_driver
dt/serial: Eliminate users of of_platform_{,un}register_driver
dt/usb: Eliminate users of of_platform_{,un}register_driver
dt/video: Eliminate users of of_platform_{,un}register_driver
dt/net: Eliminate users of of_platform_{,un}register_driver
dt/sound: Eliminate users of of_platform_{,un}register_driver
dt/spi: Eliminate users of of_platform_{,un}register_driver
dt: uartlite: merge platform and of_platform driver bindings
dt: xilinx_hwicap: merge platform and of_platform driver bindings
ipmi: convert OF driver to platform driver
leds/leds-gpio: merge platform_driver with of_platform_driver
dt/sparc: Eliminate users of of_platform_{,un}register_driver
dt/powerpc: Eliminate users of of_platform_{,un}register_driver
dt/powerpc: move of_bus_type infrastructure to ibmebus
drivercore/dt: add a match table pointer to struct device
dt: Typo fix.
altera_ps2: Add devicetree support
... -
* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (76 commits)
pch_uart: reference clock on CM-iTC
pch_phub: add new device ML7213
n_gsm: fix UIH control byte : P bit should be 0
n_gsm: add a documentation
serial: msm_serial_hs: Add MSM high speed UART driver
tty_audit: fix tty_audit_add_data live lock on audit disabled
tty: move cd1865.h to drivers/staging/tty/
Staging: tty: fix build with epca.c driver
pcmcia: synclink_cs: fix prototype for mgslpc_ioctl()
Staging: generic_serial: fix double locking bug
nozomi: don't use flush_scheduled_work()
tty/serial: Relax the device_type restriction from of_serial
MAINTAINERS: Update HVC file patterns
tty: phase out of ioctl file pointer for tty3270 as well
tty: forgot to remove ipwireless from drivers/char/pcmcia/Makefile
pch_uart: Fix DMA channel miss-setting issue.
pch_uart: fix exclusive access issue
pch_uart: fix auto flow control miss-setting issue
pch_uart: fix uart clock setting issue
pch_uart : Use dev_xxx not pr_xxx
...Fix up trivial conflicts in drivers/misc/pch_phub.c (same patch applied
twice, then changes to the same area in one branch)
16 Mar, 2011
4 commits
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Events on POWER7 can roll back if a speculative event doesn't
eventually complete. Unfortunately in some rare cases they will
raise a performance monitor exception. We need to catch this to
ensure we reset the PMC. In all cases the PMC will be 256 or less
cycles from overflow.Signed-off-by: Anton Blanchard
Signed-off-by: Peter Zijlstra
Cc: # as far back as it applies cleanly
LKML-Reference:
Signed-off-by: Ingo Molnar -
…el/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits)
x86: Clean up apic.c and apic.h
x86: Remove superflous goal definition of tsc_sync
x86: dt: Correct local apic documentation in device tree bindings
x86: dt: Cleanup local apic setup
x86: dt: Fix OLPC=y/INTEL_CE=n build
rtc: cmos: Add OF bindings
x86: ce4100: Use OF to setup devices
x86: ioapic: Add OF bindings for IO_APIC
x86: dtb: Add generic bus probe
x86: dtb: Add support for PCI devices backed by dtb nodes
x86: dtb: Add device tree support for HPET
x86: dtb: Add early parsing of IO_APIC
x86: dtb: Add irq domain abstraction
x86: dtb: Add a device tree for CE4100
x86: Add device tree support
x86: e820: Remove conditional early mapping in parse_e820_ext
x86: OLPC: Make OLPC=n build again
x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirection
x86: OLPC: Cleanup config maze completely
x86: OLPC: Hide OLPC_OPENFIRMWARE config switch
...Fix up conflicts in arch/x86/platform/ce4100/ce4100.c
-
…el/git/tip/linux-2.6-tip
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
rtmutex: tester: Remove the remaining BKL leftovers
lockdep/timers: Explain in detail the locking problems del_timer_sync() may cause
rtmutex: Simplify PI algorithm and make highest prio task get lock
rwsem: Remove redundant asmregparm annotation
rwsem: Move duplicate function prototypes to linux/rwsem.h
rwsem: Unify the duplicate rwsem_is_locked() inlines
rwsem: Move duplicate init macros and functions to linux/rwsem.h
rwsem: Move duplicate struct rwsem declaration to linux/rwsem.h
x86: Cleanup rwsem_count_t typedef
rwsem: Cleanup includes
locking: Remove deprecated lock initializers
cred: Replace deprecated spinlock initialization
kthread: Replace deprecated spinlock initialization
xtensa: Replace deprecated spinlock initialization
um: Replace deprecated spinlock initialization
sparc: Replace deprecated spinlock initialization
mips: Replace deprecated spinlock initialization
cris: Replace deprecated spinlock initialization
alpha: Replace deprecated spinlock initialization
rtmutex-tester: Remove BKL tests -
…el/git/tip/linux-2.6-tip
* 'core-futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
arm: Remove bogus comment in futex_atomic_cmpxchg_inatomic()
futex: Deobfuscate handle_futex_death()
plist: Add priority list test
plist: Shrink struct plist_head
futex,plist: Remove debug lock assignment from plist_node
futex,plist: Pass the real head of the priority list to plist_del()
futex: Sanitize futex ops argument types
futex: Sanitize cmpxchg_futex_value_locked API
futex: Remove redundant pagefault_disable in futex_atomic_cmpxchg_inatomic()
futex: Avoid redudant evaluation of task_pid_vnr()
futex: Update futex_wait_setup comments about locking
15 Mar, 2011
1 commit
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This erratum can occur if a single-precision floating-point,
double-precision floating-point or vector floating-point instruction on a
mispredicted branch path signals one of the floating-point data interrupts
which are enabled by the SPEFSCR (FINVE, FDBZE, FUNFE or FOVFE bits). This
interrupt must be recorded in a one-cycle window when the misprediction is
resolved. If this extremely rare event should occur, the result could be:The SPE Data Exception from the mispredicted path may be reported
erroneously if a single-precision floating-point, double-precision
floating-point or vector floating-point instruction is the second
instruction on the correct branch path.According to errata description, some efp instructions which are not
supposed to trigger SPE exceptions can trigger the exceptions in this case.
However, as we haven't emulated these instructions here, a signal will
send to userspace, and userspace application would exit.This patch re-issue the efp instruction that we haven't emulated,
so that hardware can properly execute it again if this case happen.Signed-off-by: Liu Yu
Signed-off-by: Kumar Gala
