14 Oct, 2015
2 commits
-
We no longer have users for these functions so they can be removed.
Remove also unused enums from the header file.Signed-off-by: Peter Ujfalusi
Signed-off-by: Vinod Koul -
In case when the interrupt happened for the second eDMA the channel
number was incorrectly passed to the client driver.Signed-off-by: Peter Ujfalusi
CC:
Signed-off-by: Vinod Koul
13 Sep, 2015
1 commit
-
Pull CRIS updates from Jesper Nilsson:
"Mostly removal of old cruft of which we can use a generic version, or
fixes for code not commonly run in the cris port, but also additions
to enable some good debug"* tag 'cris-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jesper/cris: (25 commits)
CRISv10: delete unused lib/dmacopy.c
CRISv10: delete unused lib/old_checksum.c
CRIS: fix switch_mm() lockdep splat
CRISv32: enable LOCKDEP_SUPPORT
CRIS: add STACKTRACE_SUPPORT
CRISv32: annotate irq enable in idle loop
CRISv32: add support for irqflags tracing
CRIS: UAPI: use generic types.h
CRIS: UAPI: use generic shmbuf.h
CRIS: UAPI: use generic msgbuf.h
CRIS: UAPI: use generic socket.h
CRIS: UAPI: use generic sembuf.h
CRIS: UAPI: use generic sockios.h
CRIS: UAPI: use generic auxvec.h
CRIS: UAPI: use generic headers via Kbuild
CRIS: UAPI: fix elf.h export
CRIS: don't make asm/elf.h depend on asm/user.h
CRIS: UAPI: fix ptrace.h
CRISv32: Squash compile warnings for axisflashmap
CRISv32: Add GPIO driver to the default configs
...
12 Sep, 2015
3 commits
-
Merge fourth patch-bomb from Andrew Morton:
- sys_membarier syscall
- seq_file interface changes
- a few misc fixups
* emailed patches from Andrew Morton :
revert "ocfs2/dlm: use list_for_each_entry instead of list_for_each"
mm/early_ioremap: add explicit #include of asm/early_ioremap.h
fs/seq_file: convert int seq_vprint/seq_printf/etc... returns to void
selftests: enhance membarrier syscall test
selftests: add membarrier syscall test
sys_membarrier(): system-wide memory barrier (generic, x86)
MODSIGN: fix a compilation warning in extract-cert -
Newer bitfiles needs the reduced clk even for SMP builds
Cc: #4.2
Signed-off-by: Vineet Gupta
Signed-off-by: Linus Torvalds -
Here is an implementation of a new system call, sys_membarrier(), which
executes a memory barrier on all threads running on the system. It is
implemented by calling synchronize_sched(). It can be used to
distribute the cost of user-space memory barriers asymmetrically by
transforming pairs of memory barriers into pairs consisting of
sys_membarrier() and a compiler barrier. For synchronization primitives
that distinguish between read-side and write-side (e.g. userspace RCU
[1], rwlocks), the read-side can be accelerated significantly by moving
the bulk of the memory barrier overhead to the write-side.The existing applications of which I am aware that would be improved by
this system call are as follows:* Through Userspace RCU library (http://urcu.so)
- DNS server (Knot DNS) https://www.knot-dns.cz/
- Network sniffer (http://netsniff-ng.org/)
- Distributed object storage (https://sheepdog.github.io/sheepdog/)
- User-space tracing (http://lttng.org)
- Network storage system (https://www.gluster.org/)
- Virtual routers (https://events.linuxfoundation.org/sites/events/files/slides/DPDK_RCU_0MQ.pdf)
- Financial software (https://lkml.org/lkml/2015/3/23/189)Those projects use RCU in userspace to increase read-side speed and
scalability compared to locking. Especially in the case of RCU used by
libraries, sys_membarrier can speed up the read-side by moving the bulk of
the memory barrier cost to synchronize_rcu().* Direct users of sys_membarrier
- core dotnet garbage collector (https://github.com/dotnet/coreclr/issues/198)Microsoft core dotnet GC developers are planning to use the mprotect()
side-effect of issuing memory barriers through IPIs as a way to implement
Windows FlushProcessWriteBuffers() on Linux. They are referring to
sys_membarrier in their github thread, specifically stating that
sys_membarrier() is what they are looking for.To explain the benefit of this scheme, let's introduce two example threads:
Thread A (non-frequent, e.g. executing liburcu synchronize_rcu())
Thread B (frequent, e.g. executing liburcu
rcu_read_lock()/rcu_read_unlock())In a scheme where all smp_mb() in thread A are ordering memory accesses
with respect to smp_mb() present in Thread B, we can change each
smp_mb() within Thread A into calls to sys_membarrier() and each
smp_mb() within Thread B into compiler barriers "barrier()".Before the change, we had, for each smp_mb() pairs:
Thread A Thread B
previous mem accesses previous mem accesses
smp_mb() smp_mb()
following mem accesses following mem accessesAfter the change, these pairs become:
Thread A Thread B
prev mem accesses prev mem accesses
sys_membarrier() barrier()
follow mem accesses follow mem accessesAs we can see, there are two possible scenarios: either Thread B memory
accesses do not happen concurrently with Thread A accesses (1), or they
do (2).1) Non-concurrent Thread A vs Thread B accesses:
Thread A Thread B
prev mem accesses
sys_membarrier()
follow mem accesses
prev mem accesses
barrier()
follow mem accessesIn this case, thread B accesses will be weakly ordered. This is OK,
because at that point, thread A is not particularly interested in
ordering them with respect to its own accesses.2) Concurrent Thread A vs Thread B accesses
Thread A Thread B
prev mem accesses prev mem accesses
sys_membarrier() barrier()
follow mem accesses follow mem accessesIn this case, thread B accesses, which are ensured to be in program
order thanks to the compiler barrier, will be "upgraded" to full
smp_mb() by synchronize_sched().* Benchmarks
On Intel Xeon E5405 (8 cores)
(one thread is calling sys_membarrier, the other 7 threads are busy
looping)1000 non-expedited sys_membarrier calls in 33s =3D 33 milliseconds/call.
* User-space user of this system call: Userspace RCU library
Both the signal-based and the sys_membarrier userspace RCU schemes
permit us to remove the memory barrier from the userspace RCU
rcu_read_lock() and rcu_read_unlock() primitives, thus significantly
accelerating them. These memory barriers are replaced by compiler
barriers on the read-side, and all matching memory barriers on the
write-side are turned into an invocation of a memory barrier on all
active threads in the process. By letting the kernel perform this
synchronization rather than dumbly sending a signal to every process
threads (as we currently do), we diminish the number of unnecessary wake
ups and only issue the memory barriers on active threads. Non-running
threads do not need to execute such barrier anyway, because these are
implied by the scheduler context switches.Results in liburcu:
Operations in 10s, 6 readers, 2 writers:
memory barriers in reader: 1701557485 reads, 2202847 writes
signal-based scheme: 9830061167 reads, 6700 writes
sys_membarrier: 9952759104 reads, 425 writes
sys_membarrier (dyn. check): 7970328887 reads, 425 writesThe dynamic sys_membarrier availability check adds some overhead to
the read-side compared to the signal-based scheme, but besides that,
sys_membarrier slightly outperforms the signal-based scheme. However,
this non-expedited sys_membarrier implementation has a much slower grace
period than signal and memory barrier schemes.Besides diminishing the number of wake-ups, one major advantage of the
membarrier system call over the signal-based scheme is that it does not
need to reserve a signal. This plays much more nicely with libraries,
and with processes injected into for tracing purposes, for which we
cannot expect that signals will be unused by the application.An expedited version of this system call can be added later on to speed
up the grace period. Its implementation will likely depend on reading
the cpu_curr()->mm without holding each CPU's rq lock.This patch adds the system call to x86 and to asm-generic.
[1] http://urcu.so
membarrier(2) man page:
MEMBARRIER(2) Linux Programmer's Manual MEMBARRIER(2)
NAME
membarrier - issue memory barriers on a set of threadsSYNOPSIS
#includeint membarrier(int cmd, int flags);
DESCRIPTION
The cmd argument is one of the following:MEMBARRIER_CMD_QUERY
Query the set of supported commands. It returns a bitmask of
supported commands.MEMBARRIER_CMD_SHARED
Execute a memory barrier on all threads running on the system.
Upon return from system call, the caller thread is ensured that
all running threads have passed through a state where all memory
accesses to user-space addresses match program order between
entry to and return from the system call (non-running threads
are de facto in such a state). This covers threads from all pro=E2=80=90
cesses running on the system. This command returns 0.The flags argument needs to be 0. For future extensions.
All memory accesses performed in program order from each targeted
thread is guaranteed to be ordered with respect to sys_membarrier(). If
we use the semantic "barrier()" to represent a compiler barrier forcing
memory accesses to be performed in program order across the barrier,
and smp_mb() to represent explicit memory barriers forcing full memory
ordering across the barrier, we have the following ordering table for
each pair of barrier(), sys_membarrier() and smp_mb():The pair ordering is detailed as (O: ordered, X: not ordered):
barrier() smp_mb() sys_membarrier()
barrier() X X O
smp_mb() X O O
sys_membarrier() O O ORETURN VALUE
On success, these system calls return zero. On error, -1 is returned,
and errno is set appropriately. For a given command, with flags
argument set to 0, this system call is guaranteed to always return the
same value until reboot.ERRORS
ENOSYS System call is not implemented.EINVAL Invalid arguments.
Linux 2015-04-15 MEMBARRIER(2)
Signed-off-by: Mathieu Desnoyers
Reviewed-by: Paul E. McKenney
Reviewed-by: Josh Triplett
Cc: KOSAKI Motohiro
Cc: Steven Rostedt
Cc: Nicholas Miell
Cc: Ingo Molnar
Cc: Alan Cox
Cc: Lai Jiangshan
Cc: Stephen Hemminger
Cc: Thomas Gleixner
Cc: Peter Zijlstra
Cc: David Howells
Cc: Pranith Kumar
Cc: Michael Kerrisk
Cc: Shuah Khan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Sep, 2015
15 commits
-
Merge third patch-bomb from Andrew Morton:
- even more of the rest of MM
- lib/ updates
- checkpatch updates
- small changes to a few scruffy filesystems
- kmod fixes/cleanups
- kexec updates
- a dma-mapping cleanup series from hch
* emailed patches from Andrew Morton : (81 commits)
dma-mapping: consolidate dma_set_mask
dma-mapping: consolidate dma_supported
dma-mapping: cosolidate dma_mapping_error
dma-mapping: consolidate dma_{alloc,free}_noncoherent
dma-mapping: consolidate dma_{alloc,free}_{attrs,coherent}
mm: use vma_is_anonymous() in create_huge_pmd() and wp_huge_pmd()
mm: make sure all file VMAs have ->vm_ops set
mm, mpx: add "vm_flags_t vm_flags" arg to do_mmap_pgoff()
mm: mark most vm_operations_struct const
namei: fix warning while make xmldocs caused by namei.c
ipc: convert invalid scenarios to use WARN_ON
zlib_deflate/deftree: remove bi_reverse()
lib/decompress_unlzma: Do a NULL check for pointer
lib/decompressors: use real out buf size for gunzip with kernel
fs/affs: make root lookup from blkdev logical size
sysctl: fix int -> unsigned long assignments in INT_MIN case
kexec: export KERNEL_IMAGE_SIZE to vmcoreinfo
kexec: align crash_notes allocation to make it be inside one physical page
kexec: remove unnecessary test in kimage_alloc_crash_control_pages()
kexec: split kexec_load syscall from kexec core code
... -
Pull late ARM SoC updates from Kevin Hilman:
"This is a collection of a few late fixes and other misc stuff that had
dependencies on things being merged from other trees.The bulk of the changes are for samsung/exynos SoCs for some changes
that needed a few minor reworks so ended up a bit late. The others
are mainly for qcom SoCs: a couple fixes and some DTS updates"* tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (37 commits)
ARM: multi_v7_defconfig: Enable PBIAS regulator
soc: qcom: smd: Correct fBLOCKREADINTR handling
soc: qcom: smd: Use correct remote processor ID
soc: qcom: smem: Fix errant private access
ARM: dts: qcom: msm8974-sony-xperia-honami: Use stdout-path
ARM: dts: qcom: msm8960-cdp: Use stdout-path
ARM: dts: qcom: msm8660-surf: Use stdout-path
ARM: dts: qcom: ipq8064-ap148: Use stdout-path
ARM: dts: qcom: apq8084-mtp: Use stdout-path
ARM: dts: qcom: apq8084-ifc6540: Use stdout-path
ARM: dts: qcom: apq8074-dragonboard: Use stdout-path
ARM: dts: qcom: apq8064-ifc6410: Use stdout-path
ARM: dts: qcom: apq8064-cm-qs600: Use stdout-path
ARM: dts: qcom: Label serial nodes for aliasing and stdout-path
reset: ath79: Fix missing spin_lock_init
reset: Add (devm_)reset_control_get stub functions
ARM: EXYNOS: switch to using generic cpufreq driver for exynos4x12
cpufreq: exynos: Remove unselectable rule for arm-exynos-cpufreq.o
ARM: dts: add iommu property to JPEG device for exynos4
ARM: dts: enable SPI1 for exynos4412-odroidu3
... -
Pull more kvm updates from Paolo Bonzini:
"ARM:
- Full debug support for arm64
- Active state switching for timer interrupts
- Lazy FP/SIMD save/restore for arm64
- Generic ARMv8 targetPPC:
- Book3S: A few bug fixes
- Book3S: Allow micro-threading on POWER8x86:
- Compiler warningsGeneric:
- Adaptive polling for guest halt"* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (49 commits)
kvm: irqchip: fix memory leak
kvm: move new trace event outside #ifdef CONFIG_KVM_ASYNC_PF
KVM: trace kvm_halt_poll_ns grow/shrink
KVM: dynamic halt-polling
KVM: make halt_poll_ns per-vCPU
Silence compiler warning in arch/x86/kvm/emulate.c
kvm: compile process_smi_save_seg_64() only for x86_64
KVM: x86: avoid uninitialized variable warning
KVM: PPC: Book3S: Fix typo in top comment about locking
KVM: PPC: Book3S: Fix size of the PSPB register
KVM: PPC: Book3S HV: Exit on H_DOORBELL if HOST_IPI is set
KVM: PPC: Book3S HV: Fix race in starting secondary threads
KVM: PPC: Book3S: correct width in XER handling
KVM: PPC: Book3S HV: Fix preempted vcore stolen time calculation
KVM: PPC: Book3S HV: Fix preempted vcore list locking
KVM: PPC: Book3S HV: Implement H_CLEAR_REF and H_CLEAR_MOD
KVM: PPC: Book3S HV: Fix bug in dirty page tracking
KVM: PPC: Book3S HV: Fix race in reading change bit when removing HPTE
KVM: PPC: Book3S HV: Implement dynamic micro-threading on POWER8
KVM: PPC: Book3S HV: Make use of unused threads when running guests
... -
Pull xen terminology fixes from David Vrabel:
"Use the correct GFN/BFN terms more consistently"* tag 'for-linus-4.3-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/xenbus: Rename the variable xen_store_mfn to xen_store_gfn
xen/privcmd: Further s/MFN/GFN/ clean-up
hvc/xen: Further s/MFN/GFN clean-up
video/xen-fbfront: Further s/MFN/GFN clean-up
xen/tmem: Use xen_page_to_gfn rather than pfn_to_gfn
xen: Use correctly the Xen memory terminologies
arm/xen: implement correctly pfn_to_mfn
xen: Make clear that swiotlb and biomerge are dealing with DMA address -
Pull microblaze update from Michal Simek.
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
elf-em.h: move EM_MICROBLAZE to the common header -
Pull hexagon updates from Richard Kuo:
"Just two fixes -- one for a uapi header and one for a timer interface"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel:
Revert "Hexagon: fix signal.c compile error"
hexagon/time: Migrate to new 'set-state' interface -
Almost everyone implements dma_set_mask the same way, although some time
that's hidden in ->set_dma_mask methods.This patch consolidates those into a common implementation that either
calls ->set_dma_mask if present or otherwise uses the default
implementation. Some architectures used to only call ->set_dma_mask
after the initial checks, and those instance have been fixed to do the
full work. h8300 implemented dma_set_mask bogusly as a no-ops and has
been fixed.Unfortunately some architectures overload unrelated semantics like changing
the dma_ops into it so we still need to allow for an architecture override
for now.[jcmvbkbc@gmail.com: fix xtensa]
Signed-off-by: Christoph Hellwig
Cc: Arnd Bergmann
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Yoshinori Sato
Cc: Michal Simek
Cc: Jonas Bonn
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Andy Shevchenko
Signed-off-by: Max Filippov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Most architectures just call into ->dma_supported, but some also return 1
if the method is not present, or 0 if no dma ops are present (although
that should never happeb). Consolidate this more broad version into
common code.Also fix h8300 which inorrectly always returned 0, which would have been
a problem if it's dma_set_mask implementation wasn't a similarly buggy
noop.As a few architectures have much more elaborate implementations, we
still allow for arch overrides.[jcmvbkbc@gmail.com: fix xtensa]
Signed-off-by: Christoph Hellwig
Cc: Arnd Bergmann
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Yoshinori Sato
Cc: Michal Simek
Cc: Jonas Bonn
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Andy Shevchenko
Signed-off-by: Max Filippov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently there are three valid implementations of dma_mapping_error:
(1) call ->mapping_error
(2) check for a hardcoded error code
(3) always return 0This patch provides a common implementation that calls ->mapping_error
if present, then checks for DMA_ERROR_CODE if defined or otherwise
returns 0.[jcmvbkbc@gmail.com: fix xtensa]
Signed-off-by: Christoph Hellwig
Cc: Arnd Bergmann
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Yoshinori Sato
Cc: Michal Simek
Cc: Jonas Bonn
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Andy Shevchenko
Signed-off-by: Max Filippov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Most architectures do not support non-coherent allocations and either
define dma_{alloc,free}_noncoherent to their coherent versions or stub
them out.Openrisc uses dma_{alloc,free}_attrs to implement them, and only Mips
implements them directly.This patch moves the Openrisc version to common code, and handles the
DMA_ATTR_NON_CONSISTENT case in the mips dma_map_ops instance.Note that actual non-coherent allocations require a dma_cache_sync
implementation, so if non-coherent allocations didn't work on
an architecture before this patch they still won't work after it.[jcmvbkbc@gmail.com: fix xtensa]
Signed-off-by: Christoph Hellwig
Cc: Arnd Bergmann
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Yoshinori Sato
Cc: Michal Simek
Cc: Jonas Bonn
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Andy Shevchenko
Signed-off-by: Max Filippov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since 2009 we have a nice asm-generic header implementing lots of DMA API
functions for architectures using struct dma_map_ops, but unfortunately
it's still missing a lot of APIs that all architectures still have to
duplicate.This series consolidates the remaining functions, although we still need
arch opt outs for two of them as a few architectures have very
non-standard implementations.This patch (of 5):
The coherent DMA allocator works the same over all architectures supporting
dma_map operations.This patch consolidates them and converges the minor differences:
- the debug_dma helpers are now called from all architectures, including
those that were previously missing them
- dma_alloc_from_coherent and dma_release_from_coherent are now always
called from the generic alloc/free routines instead of the ops
dma-mapping-common.h always includes dma-coherent.h to get the defintions
for them, or the stubs if the architecture doesn't support this feature
- checks for ->alloc / ->free presence are removed. There is only one
magic instead of dma_map_ops without them (mic_dma_ops) and that one
is x86 only anyway.Besides that only x86 needs special treatment to replace a default devices
if none is passed and tweak the gfp_flags. An optional arch hook is provided
for that.[linux@roeck-us.net: fix build]
[jcmvbkbc@gmail.com: fix xtensa]
Signed-off-by: Christoph Hellwig
Cc: Arnd Bergmann
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Yoshinori Sato
Cc: Michal Simek
Cc: Jonas Bonn
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Andy Shevchenko
Signed-off-by: Guenter Roeck
Signed-off-by: Max Filippov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add the additional "vm_flags_t vm_flags" argument to do_mmap_pgoff(),
rename it to do_mmap(), and re-introduce do_mmap_pgoff() as a simple
wrapper on top of do_mmap(). Perhaps we should update the callers of
do_mmap_pgoff() and kill it later.This way mpx_mmap() can simply call do_mmap(vm_flags => VM_MPX) and do not
play with vm internals.After this change mmap_region() has a single user outside of mmap.c,
arch/tile/mm/elf.c:arch_setup_additional_pages(). It would be nice to
change arch/tile/ and unexport mmap_region().[kirill@shutemov.name: fix build]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Oleg Nesterov
Acked-by: Dave Hansen
Tested-by: Dave Hansen
Signed-off-by: Kirill A. Shutemov
Cc: "H. Peter Anvin"
Cc: Andy Lutomirski
Cc: Ingo Molnar
Cc: Minchan Kim
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
With two exceptions (drm/qxl and drm/radeon) all vm_operations_struct
structs should be constant.Signed-off-by: Kirill A. Shutemov
Reviewed-by: Oleg Nesterov
Cc: "H. Peter Anvin"
Cc: Andy Lutomirski
Cc: Dave Hansen
Cc: Ingo Molnar
Cc: Minchan Kim
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When loading x86 64bit kernel above 4GiB with patched grub2, got kernel
gunzip error.| early console in decompress_kernel
| decompress_kernel:
| input: [0x807f2143b4-0x807ff61aee]
| output: [0x807cc00000-0x807f3ea29b] 0x027ea29c: output_len
| boot via startup_64
| KASLR using RDTSC...
| new output: [0x46fe000000-0x470138cfff] 0x0338d000: output_run_size
| decompress: [0x46fe000000-0x47007ea29b]
Cc: Alexandre Courbot
Cc: Jon Medhurst
Cc: Stephen Warren
Cc: "H. Peter Anvin"
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There are two kexec load syscalls, kexec_load another and kexec_file_load.
kexec_file_load has been splited as kernel/kexec_file.c. In this patch I
split kexec_load syscall code to kernel/kexec.c.And add a new kconfig option KEXEC_CORE, so we can disable kexec_load and
use kexec_file_load only, or vice verse.The original requirement is from Ted Ts'o, he want kexec kernel signature
being checked with CONFIG_KEXEC_VERIFY_SIG enabled. But kexec-tools use
kexec_load syscall can bypass the checking.Vivek Goyal proposed to create a common kconfig option so user can compile
in only one syscall for loading kexec kernel. KEXEC/KEXEC_FILE selects
KEXEC_CORE so that old config files still work.Because there's general code need CONFIG_KEXEC_CORE, so I updated all the
architecture Kconfig with a new option KEXEC_CORE, and let KEXEC selects
KEXEC_CORE in arch Kconfig. Also updated general kernel code with to
kexec_load syscall.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Dave Young
Cc: Eric W. Biederman
Cc: Vivek Goyal
Cc: Petr Tesarik
Cc: Theodore Ts'o
Cc: Josh Boyer
Cc: David Howells
Cc: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Sep, 2015
19 commits
-
The linux/audit.h header uses EM_MICROBLAZE in order to define
AUDIT_ARCH_MICROBLAZE, but it's only available in the microblaze
asm headers. Move it to the common elf-em.h header so that the
define can be used on non-microblaze systems. Otherwise we get
build errors that EM_MICROBLAZE isn't defined when we try to use
the AUDIT_ARCH_MICROBLAZE symbol.Signed-off-by: Mike Frysinger
Signed-off-by: Michal Simek -
Qualcomm ARM Based Device Tree Updates for v4.3-rc2
* Add labels for serial nodes to be used for aliasing and stdout-path
* Add stdout-path for APQ8064 Compulab QS600
* Add stdout-path for APQ8064 Inforce 6410
* Add stdout-path for APQ8074 Dragonboard
* Add stdout-path for APQ8084 Inforce 6540
* Add stdout-path for APQ8084 MTP
* Add stdout-path for IPQ8064 AP148
* Add stdout-path for MSM8660 Surf
* Add stdout-path for MSM8960 CDP
* Add stdout-path for MSM8974 Xperia Honami* tag 'qcom-dt-for-4.3-rc2' of git://codeaurora.org/quic/kernel/agross-msm: (24 commits)
ARM: dts: qcom: msm8974-sony-xperia-honami: Use stdout-path
ARM: dts: qcom: msm8960-cdp: Use stdout-path
ARM: dts: qcom: msm8660-surf: Use stdout-path
ARM: dts: qcom: ipq8064-ap148: Use stdout-path
ARM: dts: qcom: apq8084-mtp: Use stdout-path
ARM: dts: qcom: apq8084-ifc6540: Use stdout-path
ARM: dts: qcom: apq8074-dragonboard: Use stdout-path
ARM: dts: qcom: apq8064-ifc6410: Use stdout-path
ARM: dts: qcom: apq8064-cm-qs600: Use stdout-path
ARM: dts: qcom: Label serial nodes for aliasing and stdout-path
ARM: dts: qs600: Add real regulators to sdcc
ARM: dts: ifc6410: add real regulators for sdcc nodes.
ARM: dts: apq8064: remove temporary fixed regulator for mmc
ARM: dts: apq8064: fix missing gsbi cell-index
ARM: dts: apq8064: Add DT support for GSBI6 and for UART pin mux
ARM: dts: apq8064: add pm8921 mpp support
ARM: dts: apq8064: Add pm8921 mfd and its gpio node
ARM: dts: msm8974: Add smem reservation and node
ARM: dts: msm8974: Add tcsr mutex node
ARM: dts: qcom: Add ks8851 node for wired ethernet
... -
* next/defconfig: (45 commits)
ARM: multi_v7_defconfig: Enable PBIAS regulator
ARM: add TC2 PM support to multi_v7_defconfig
ARM: tegra: Update multi_v7_defconfig
ARM: tegra: Update default configuration
ARM: at91/defconfig: at91_dt: remove ARM_AT91_ETHER
ARM: at91/defconfig: at91_dt: enable DRM hlcdc support
ARM: at91: at91_dt_defconfig: enable ISI and ov2640 support
ARM: multi_v7_defconfig: Enable Allwinner P2WI, PWM, DMA_SUN6I, cryptodev
ARM: sunxi_defconfig: Enable DMA_SUN6I, P2WI, PWM, cryptodev, EXTCON, FHANDLE
ARM: shmobile: Enable fixed voltage regulator in shmobile_defconfig
ARM: multi_v7_defconfig: Select MX6UL and MX7D
ARM: prima2_defconfig: enable build for hwspinlock
ARM: prima2_defconfig: enable build for RTC
ARM: prima2_defconfig: enable build for misc input
ARM: prima2_defconfig: enable build for SiRFSoC SDHC host
ARM: prima2_defconfig: fix the outdated defconfig
ARM: imx_v6_v7_defconfig: Select CONFIG_IKCONFIG_PROC
ARM: defconfig: orion5x: add DT support
ARM: qcom_defconfig: Enable options for KS8851 ethernet
ARM: multi_v7_defconfig: Enable support for PWM Regulators
... -
PBIAS regulator is required for MMC module in OMAP2, OMAP3, OMAP4,
OMAP5 and DRA7 SoCs. Enable it here.Signed-off-by: Kishon Vijay Abraham I
Signed-off-by: Kevin Hilman -
* drivers/reset:
reset: ath79: Fix missing spin_lock_init
reset: Add (devm_)reset_control_get stub functions
reset: reset-zynq: Adding support for Xilinx Zynq reset controller.
docs: dts: Added documentation for Xilinx Zynq Reset Controller bindings.
MIPS: ath79: Add the reset controller to the AR9132 dtsi
reset: Add a driver for the reset controller on the AR71XX/AR9XXX
devicetree: Add bindings for the ATH79 reset controller
reset: socfpga: Update reset-socfpga to read the altr,modrst-offset property
doc: dt: add documentation for lpc1850-rgu reset driver
reset: add driver for lpc18xx rgu
reset: sti: constify of_device_id array
ARM: STi: DT: Move reset controller constants into common location
MAINTAINERS: add include/dt-bindings/reset path to reset controller entry -
Use stdout-path so that we don't have to put the console on the
kernel command line.Cc: Tim Bird
Cc: Bjorn Andersson
Signed-off-by: Stephen Boyd -
Use stdout-path so that we don't have to put the console on the
kernel command line.Signed-off-by: Stephen Boyd
-
Use stdout-path so that we don't have to put the console on the
kernel command line.Signed-off-by: Stephen Boyd
-
Use stdout-path so that we don't have to put the console on the
kernel command line.Cc: Mathieu Olivari
Signed-off-by: Stephen Boyd -
Use stdout-path so that we don't have to put the console on the
kernel command line.Signed-off-by: Stephen Boyd
-
Use stdout-path so that we don't have to put the console on the
kernel command line.Signed-off-by: Stephen Boyd
-
Use stdout-path so that we don't have to put the console on the
kernel command line.Signed-off-by: Stephen Boyd
-
Use stdout-path so that we don't have to put the console on the
kernel command line.Signed-off-by: Stephen Boyd
-
Use stdout-path so that we don't have to put the console on the
kernel command line.Cc: Mike Rapoport
Cc: Igor Grinberg
Signed-off-by: Stephen Boyd -
Add a label to the serial nodes that are being used for the
console.Signed-off-by: Stephen Boyd
-
Qualcomm ARM Based Device Tree Updates for v4.3
* Switch to use pinctrl compatible for GPIOs
* Add RPM regulators for MSM8960
* Add SPI Ethernet support on MSM8960 CDP
* Add SMEM support along with dependencies
* Add PM8921 support for GPIO and MPP
* Fix GSBI cell index
* Switch to use real regulators on APQ8064 w/ SDCC -
Pull metag updates from James Hogan:
"Metag architecture changes for v4.3.Just a couple of changes for v4.3-rc1. A preparatory IRQ patch to
prepare for moving irq_data struct members, and a tweak to
Documentation/features since Meta2 could support THP"* tag 'metag-for-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
Documentation/features/vm: Meta2 is capable of THP
metag/irq: Use access helper irq_data_get_affinity_mask() -
Pull nios2 updates from Ley Foon Tan:
- add defconfig and device tree for max 10 support
- migrate to new 'set-state' interface for timer
- fix unaligned handler
- MAINTAINERS: update nios2 git repo* tag 'nios2-v4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
nios2: add Max10 defconfig
nios2: Add Max10 device tree
MAINTAINERS: update nios2 git repo
nios2: remove unused statistic counters
nios2: fixed variable imm16 to s16
nios2/time: Migrate to new 'set-state' interface -
This reverts commit f3f601c1d2728f02544cfd143eaa82e5398b3e9b.
UAPI headers cannot use "uapi/" in their paths by design -- when they're
installed, they do not have the uapi/ prefix. Otherwise doing so breaks
userland badly.Signed-off-by: Mike Frysinger
Signed-off-by: Richard Kuo
