10 May, 2017
1 commit
-
Regularly, when a new header is created in include/uapi/, the developer
forgets to add it in the corresponding Kbuild file. This error is usually
detected after the release is out.In fact, all headers under uapi directories should be exported, thus it's
useless to have an exhaustive list.After this patch, the following files, which were not exported, are now
exported (with make headers_install_all):
asm-arc/kvm_para.h
asm-arc/ucontext.h
asm-blackfin/shmparam.h
asm-blackfin/ucontext.h
asm-c6x/shmparam.h
asm-c6x/ucontext.h
asm-cris/kvm_para.h
asm-h8300/shmparam.h
asm-h8300/ucontext.h
asm-hexagon/shmparam.h
asm-m32r/kvm_para.h
asm-m68k/kvm_para.h
asm-m68k/shmparam.h
asm-metag/kvm_para.h
asm-metag/shmparam.h
asm-metag/ucontext.h
asm-mips/hwcap.h
asm-mips/reg.h
asm-mips/ucontext.h
asm-nios2/kvm_para.h
asm-nios2/ucontext.h
asm-openrisc/shmparam.h
asm-parisc/kvm_para.h
asm-powerpc/perf_regs.h
asm-sh/kvm_para.h
asm-sh/ucontext.h
asm-tile/shmparam.h
asm-unicore32/shmparam.h
asm-unicore32/ucontext.h
asm-x86/hwcap2.h
asm-xtensa/kvm_para.h
drm/armada_drm.h
drm/etnaviv_drm.h
drm/vgem_drm.h
linux/aspeed-lpc-ctrl.h
linux/auto_dev-ioctl.h
linux/bcache.h
linux/btrfs_tree.h
linux/can/vxcan.h
linux/cifs/cifs_mount.h
linux/coresight-stm.h
linux/cryptouser.h
linux/fsmap.h
linux/genwqe/genwqe_card.h
linux/hash_info.h
linux/kcm.h
linux/kcov.h
linux/kfd_ioctl.h
linux/lightnvm.h
linux/module.h
linux/nbd-netlink.h
linux/nilfs2_api.h
linux/nilfs2_ondisk.h
linux/nsfs.h
linux/pr.h
linux/qrtr.h
linux/rpmsg.h
linux/sched/types.h
linux/sed-opal.h
linux/smc.h
linux/smc_diag.h
linux/stm.h
linux/switchtec_ioctl.h
linux/vfio_ccw.h
linux/wil6210_uapi.h
rdma/bnxt_re-abi.hNote that I have removed from this list the files which are generated in every
exported directories (like .install or .install.cmd).Thanks to Julien Floret for the tip to get all
subdirs with a pure makefile command.For the record, note that exported files for asm directories are a mix of
files listed by:
- include/uapi/asm-generic/Kbuild.asm;
- arch//include/uapi/asm/Kbuild;
- arch//include/asm/Kbuild.Signed-off-by: Nicolas Dichtel
Acked-by: Daniel Vetter
Acked-by: Russell King
Acked-by: Mark Salter
Acked-by: Michael Ellerman (powerpc)
Signed-off-by: Masahiro Yamada
02 May, 2017
3 commits
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Pull x86 asm updates from Ingo Molnar:
"The main changes in this cycle were:- unwinder fixes and enhancements
- improve ftrace interaction with the unwinder
- optimize the code footprint of WARN() and related debugging
constructs- ... plus misc updates, cleanups and fixes"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
x86/unwind: Dump all stacks in unwind_dump()
x86/unwind: Silence more entry-code related warnings
x86/ftrace: Fix ebp in ftrace_regs_caller that screws up unwinder
x86/unwind: Remove unused 'sp' parameter in unwind_dump()
x86/unwind: Prepend hex mask value with '0x' in unwind_dump()
x86/unwind: Properly zero-pad 32-bit values in unwind_dump()
x86/unwind: Ensure stack pointer is aligned
debug: Avoid setting BUGFLAG_WARNING twice
x86/unwind: Silence entry-related warnings
x86/unwind: Read stack return address in update_stack_state()
x86/unwind: Move common code into update_stack_state()
debug: Fix __bug_table[] in arch linker scripts
debug: Add _ONCE() logic to report_bug()
x86/debug: Define BUG() again for !CONFIG_BUG
x86/debug: Implement __WARN() using UD0
x86/ftrace: Use Makefile logic instead of #ifdef for compiling ftrace_*.o
x86/ftrace: Add -mfentry support to x86_32 with DYNAMIC_FTRACE set
x86/ftrace: Clean up ftrace_regs_caller
x86/ftrace: Add stack frame pointer to ftrace_caller
x86/ftrace: Move the ftrace specific code out of entry_32.S
... -
Pull timer updates from Thomas Gleixner:
"The timer departement delivers:- more year 2038 rework
- a massive rework of the arm achitected timer
- preparatory patches to allow NTP correction of clock event devices
to avoid early expiry- the usual pile of fixes and enhancements all over the place"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (91 commits)
timer/sysclt: Restrict timer migration sysctl values to 0 and 1
arm64/arch_timer: Mark errata handlers as __maybe_unused
Clocksource/mips-gic: Remove redundant non devicetree init
MIPS/Malta: Probe gic-timer via devicetree
clocksource: Use GENMASK_ULL in definition of CLOCKSOURCE_MASK
acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver
clocksource: arm_arch_timer: add GTDT support for memory-mapped timer
acpi/arm64: Add memory-mapped timer support in GTDT driver
clocksource: arm_arch_timer: simplify ACPI support code.
acpi/arm64: Add GTDT table parse driver
clocksource: arm_arch_timer: split MMIO timer probing.
clocksource: arm_arch_timer: add structs to describe MMIO timer
clocksource: arm_arch_timer: move arch_timer_needs_of_probing into DT init call
clocksource: arm_arch_timer: refactor arch_timer_needs_probing
clocksource: arm_arch_timer: split dt-only rate handling
x86/uv/time: Set ->min_delta_ticks and ->max_delta_ticks
unicore32/time: Set ->min_delta_ticks and ->max_delta_ticks
um/time: Set ->min_delta_ticks and ->max_delta_ticks
tile/time: Set ->min_delta_ticks and ->max_delta_ticks
score/time: Set ->min_delta_ticks and ->max_delta_ticks
... -
Pull uaccess unification updates from Al Viro:
"This is the uaccess unification pile. It's _not_ the end of uaccess
work, but the next batch of that will go into the next cycle. This one
mostly takes copy_from_user() and friends out of arch/* and gets the
zero-padding behaviour in sync for all architectures.Dealing with the nocache/writethrough mess is for the next cycle;
fortunately, that's x86-only. Same for cleanups in iov_iter.c (I am
sold on access_ok() in there, BTW; just not in this pile), same for
reducing __copy_... callsites, strn*... stuff, etc. - there will be a
pile about as large as this one in the next merge window.This one sat in -next for weeks. -3KLoC"
* 'work.uaccess' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (96 commits)
HAVE_ARCH_HARDENED_USERCOPY is unconditional now
CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now
m32r: switch to RAW_COPY_USER
hexagon: switch to RAW_COPY_USER
microblaze: switch to RAW_COPY_USER
get rid of padding, switch to RAW_COPY_USER
ia64: get rid of copy_in_user()
ia64: sanitize __access_ok()
ia64: get rid of 'segment' argument of __do_{get,put}_user()
ia64: get rid of 'segment' argument of __{get,put}_user_check()
ia64: add extable.h
powerpc: get rid of zeroing, switch to RAW_COPY_USER
esas2r: don't open-code memdup_user()
alpha: fix stack smashing in old_adjtimex(2)
don't open-code kernel_setsockopt()
mips: switch to RAW_COPY_USER
mips: get rid of tail-zeroing in primitives
mips: make copy_from_user() zero tail explicitly
mips: clean and reorder the forest of macros...
mips: consolidate __invoke_... wrappers
...
27 Apr, 2017
1 commit
-
all architectures converted
Signed-off-by: Al Viro
15 Apr, 2017
1 commit
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In preparation for making the clockevents core NTP correction aware,
all clockevent device drivers must set ->min_delta_ticks and
->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a
clockevent device's rate is going to change dynamically and thus, the
ratio of ns to ticks ceases to stay invariant.Make the c6x arch's clockevent driver initialize these fields properly.
This patch alone doesn't introduce any change in functionality as the
clockevents core still looks exclusively at the (untouched) ->min_delta_ns
and ->max_delta_ns. As soon as this has changed, a followup patch will
purge the initialization of ->min_delta_ns and ->max_delta_ns from this
driver.Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Daniel Lezcano
Cc: Richard Cochran
Cc: Prarit Bhargava
Cc: Stephen Boyd
Cc: Mark Salter
Cc: Aurelien Jacquiot
Cc: linux-c6x-dev@linux-c6x.org
Signed-off-by: Nicolai Stange
Signed-off-by: John Stultz
03 Apr, 2017
1 commit
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The kbuild test robot reported this build failure on a number
of architectures:> make.cross ARCH=arm
> lib/lib.a(bug.o): In function `find_bug':
> >> lib/bug.c:135: undefined reference to `__start___bug_table'
> >> lib/bug.c:135: undefined reference to `__stop___bug_table'Caused by:
19d436268dde ("debug: Add _ONCE() logic to report_bug()")
Which moved the BUG_TABLE from RO_DATA_SECTION() to RW_DATA_SECTION(),
but a number of architectures don't use RW_DATA_SECTION(), so they
ended up with no __bug_table[] ...Ideally all those would use RW_DATA_SECTION() in their linker scripts,
but that's for another day.Signed-off-by: Peter Zijlstra
Cc: Linus Torvalds
Cc: Thomas Gleixner
Cc: kbuild test robot
Cc: kbuild-all@01.org
Cc: tipbuild@zytor.com
Link: http://lkml.kernel.org/r/20170330154927.o6qmgfp4bdhrajbm@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar
29 Mar, 2017
6 commits
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Merge PTRACE_SETREGSET leakage fixes from Dave Martin:
"This series is the collection of fixes I proposed on this topic, that
have not yet appeared upstream or in the stable branches,The issue can leak kernel stack, but doesn't appear to allow userspace
to attack the kernel directly. The affected architectures are c6x,
h8300, metag, mips and sparc.[ Mark Salter points out that c6x has no MMU or other mechanism to
prevent userspace access to kernel code or data on c6x, but it
doesn't hurt to clean that case up too. ]The bugs arise from use of user_regset_copyin(). Users of
user_regset_copyin() can work in one of two ways:1) Copy directly to thread_struct or equivalent. (This seems to be
the design assumption of the regset API, and is the most common
approach.)2) Copy to a local variable and then transfer to thread_struct. (A
significant minority of cases.)Buggy code typically involves approach 2"
* emailed patches from Dave Martin :
sparc/ptrace: Preserve previous registers for short regset write
mips/ptrace: Preserve previous registers for short regset write
metag/ptrace: Reject partial NT_METAG_RPIPE writes
metag/ptrace: Provide default TXSTATUS for short NT_PRSTATUS
metag/ptrace: Preserve previous registers for short regset write
h8300/ptrace: Fix incorrect register transfer count
c6x/ptrace: Remove useless PTRACE_SETREGSET implementation -
gpr_set won't work correctly and can never have been tested, and the
correct behaviour is not clear due to the endianness-dependent task
layout.So, just remove it. The core code will now return -EOPNOTSUPPORT when
trying to set NT_PRSTATUS on this architecture until/unless a correct
implementation is supplied.Signed-off-by: Dave Martin
Signed-off-by: Linus Torvalds -
Signed-off-by: Al Viro
-
Signed-off-by: Al Viro
-
only h8300 actually used those; might as well define them there.
Signed-off-by: Al Viro
-
Signed-off-by: Al Viro
28 Mar, 2017
1 commit
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... and make the users of generic uaccess.h use that.
Signed-off-by: Al Viro
02 Mar, 2017
3 commits
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We are going to split out of , which
will have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that just
maps to to make this patch obviously correct and
bisectable.Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar -
We are going to split out of , which
will have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that just
maps to to make this patch obviously correct and
bisectable.Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar -
We are going to split out of , which
will have to be picked up from other headers and a couple of .c files.Create a trivial placeholder file that just
maps to to make this patch obviously correct and
bisectable.Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar
28 Feb, 2017
1 commit
-
Often all is needed is these small helpers, instead of compiler.h or a
full kprobes.h. This is important for asm helpers, in fact even some
asm/kprobes.h make use of these helpers... instead just keep a generic
asm file with helpers useful for asm code with the least amount of
clutter as possible.Likewise we need now to also address what to do about this file for both
when architectures have CONFIG_HAVE_KPROBES, and when they do not. Then
for when architectures have CONFIG_HAVE_KPROBES but have disabled
CONFIG_KPROBES.Right now most asm/kprobes.h do not have guards against CONFIG_KPROBES,
this means most architecture code cannot include asm/kprobes.h safely.
Correct this and add guards for architectures missing them.
Additionally provide architectures that not have kprobes support with
the default asm-generic solution. This lets us force asm/kprobes.h on
the header include/linux/kprobes.h always, but most importantly we can
now safely include just asm/kprobes.h on architecture code without
bringing the full kitchen sink of header files.Two architectures already provided a guard against CONFIG_KPROBES on its
kprobes.h: sh, arch. The rest of the architectures needed gaurds added.
We avoid including any not-needed headers on asm/kprobes.h unless
kprobes have been enabled.In a subsequent atomic change we can try now to remove compiler.h from
include/linux/kprobes.h.During this sweep I've also identified a few architectures defining a
common macro needed for both kprobes and ftrace, that of the definition
of the breakput instruction up. Some refer to this as
BREAKPOINT_INSTRUCTION. This must be kept outside of the #ifdef
CONFIG_KPROBES guard.[mcgrof@kernel.org: fix arm64 build]
Link: http://lkml.kernel.org/r/CAB=NE6X1WMByuARS4mZ1g9+W=LuVBnMDnh_5zyN0CLADaVh=Jw@mail.gmail.com
[sfr@canb.auug.org.au: fixup for kprobes declarations moving]
Link: http://lkml.kernel.org/r/20170214165933.13ebd4f4@canb.auug.org.au
Link: http://lkml.kernel.org/r/20170203233139.32682-1-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez
Signed-off-by: Stephen Rothwell
Acked-by: Masami Hiramatsu
Cc: Arnd Bergmann
Cc: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: H. Peter Anvin
Cc: Andy Lutomirski
Cc: Steven Rostedt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Feb, 2017
1 commit
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Pull rdma DMA mapping updates from Doug Ledford:
"Drop IB DMA mapping code and use core DMA code instead.Bart Van Assche noted that the ib DMA mapping code was significantly
similar enough to the core DMA mapping code that with a few changes it
was possible to remove the IB DMA mapping code entirely and switch the
RDMA stack to use the core DMA mapping code.This resulted in a nice set of cleanups, but touched the entire tree
and has been kept separate for that reason."* tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits)
IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it
IB/core: Remove ib_device.dma_device
nvme-rdma: Switch from dma_device to dev.parent
RDS: net: Switch from dma_device to dev.parent
IB/srpt: Modify a debug statement
IB/srp: Switch from dma_device to dev.parent
IB/iser: Switch from dma_device to dev.parent
IB/IPoIB: Switch from dma_device to dev.parent
IB/rxe: Switch from dma_device to dev.parent
IB/vmw_pvrdma: Switch from dma_device to dev.parent
IB/usnic: Switch from dma_device to dev.parent
IB/qib: Switch from dma_device to dev.parent
IB/qedr: Switch from dma_device to dev.parent
IB/ocrdma: Switch from dma_device to dev.parent
IB/nes: Remove a superfluous assignment statement
IB/mthca: Switch from dma_device to dev.parent
IB/mlx5: Switch from dma_device to dev.parent
IB/mlx4: Switch from dma_device to dev.parent
IB/i40iw: Remove a superfluous assignment statement
IB/hns: Switch from dma_device to dev.parent
...
01 Feb, 2017
1 commit
-
cputime_t is now only used by two architectures:
* powerpc (when CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y)
* s390And since the core doesn't use it anymore, we don't need any arch support
from the others. So we can remove their stub implementations.A final cleanup would be to provide an efficient pure arch
implementation of cputime_to_nsec() for s390 and powerpc and finally
remove include/linux/cputime.h .Signed-off-by: Frederic Weisbecker
Cc: Benjamin Herrenschmidt
Cc: Fenghua Yu
Cc: Heiko Carstens
Cc: Linus Torvalds
Cc: Martin Schwidefsky
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Stanislaw Gruszka
Cc: Thomas Gleixner
Cc: Tony Luck
Cc: Wanpeng Li
Link: http://lkml.kernel.org/r/1485832191-26889-36-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar
25 Jan, 2017
2 commits
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Introduce a new architecture-specific get_arch_dma_ops() function
that takes a struct bus_type * argument. Add get_dma_ops() in
.Signed-off-by: Bart Van Assche
Cc: Benjamin Herrenschmidt
Cc: Boris Ostrovsky
Cc: David Woodhouse
Cc: Juergen Gross
Cc: H. Peter Anvin
Cc: Ingo Molnar
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King
Cc: x86@kernel.org
Signed-off-by: Doug Ledford -
Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This patch
has been generated as follows:git grep -l 'struct dma_map_ops' |
xargs -d\\n sed -i \
-e 's/struct dma_map_ops/const struct dma_map_ops/g' \
-e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \
-e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \
-e 's/const const struct dma_map_ops /const struct dma_map_ops /g';
sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \
$(git grep -l 'struct dma_map_ops intel_dma_ops');
sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \
$(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc);
sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \
-e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \
-e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \
drivers/pci/host/*.c
sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c
sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c
sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.cSigned-off-by: Bart Van Assche
Reviewed-by: Christoph Hellwig
Cc: Benjamin Herrenschmidt
Cc: Boris Ostrovsky
Cc: David Woodhouse
Cc: Juergen Gross
Cc: H. Peter Anvin
Cc: Ingo Molnar
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King
Cc: x86@kernel.org
Signed-off-by: Doug Ledford
25 Dec, 2016
2 commits
-
There is no point in having an extra type for extra confusion. u64 is
unambiguous.Conversion was done with the following coccinelle script:
@rem@
@@
-typedef u64 cycle_t;@fix@
typedef cycle_t;
@@
-cycle_t
+u64Signed-off-by: Thomas Gleixner
Cc: Peter Zijlstra
Cc: John Stultz -
This was entirely automated, using the script by Al:
PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*'
sed -i -e "s!$PATT!#include !" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)to do the replacement at the end of the merge window.
Requested-by: Al Viro
Signed-off-by: Linus Torvalds
15 Dec, 2016
1 commit
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This change allows us to pass DMA_ATTR_SKIP_CPU_SYNC which allows us to
avoid invoking cache line invalidation if the driver will just handle it
later via a sync_for_cpu or sync_for_device call.Link: http://lkml.kernel.org/r/20161110113442.76501.7673.stgit@ahduyck-blue-test.jf.intel.com
Signed-off-by: Alexander Duyck
Acked-by: Mark Salter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Nov, 2016
1 commit
-
No need to duplicate the same define everywhere. Since
the only user is stop-machine and the only provider is
s390, we can use a default implementation of cpu_relax_yield()
in sched.h.Suggested-by: Russell King
Signed-off-by: Christian Borntraeger
Reviewed-by: David Hildenbrand
Acked-by: Russell King
Cc: Andrew Morton
Cc: Catalin Marinas
Cc: Heiko Carstens
Cc: Linus Torvalds
Cc: Martin Schwidefsky
Cc: Nicholas Piggin
Cc: Noam Camus
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: Will Deacon
Cc: kvm@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-s390
Cc: linuxppc-dev@lists.ozlabs.org
Cc: sparclinux@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1479298985-191589-1-git-send-email-borntraeger@de.ibm.com
Signed-off-by: Ingo Molnar
16 Nov, 2016
2 commits
-
As there are no users left, we can remove cpu_relax_lowlatency()
implementations from every architecture.Signed-off-by: Christian Borntraeger
Signed-off-by: Peter Zijlstra (Intel)
Cc: Catalin Marinas
Cc: Heiko Carstens
Cc: Linus Torvalds
Cc: Martin Schwidefsky
Cc: Nicholas Piggin
Cc: Noam Camus
Cc: Peter Zijlstra
Cc: Russell King
Cc: Thomas Gleixner
Cc: Will Deacon
Cc: linuxppc-dev@lists.ozlabs.org
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Cc:
Link: http://lkml.kernel.org/r/1477386195-32736-6-git-send-email-borntraeger@de.ibm.com
Signed-off-by: Ingo Molnar -
For spinning loops people do often use barrier() or cpu_relax().
For most architectures cpu_relax and barrier are the same, but on
some architectures cpu_relax can add some latency.
For example on power,sparc64 and arc, cpu_relax can shift the CPU
towards other hardware threads in an SMT environment.
On s390 cpu_relax does even more, it uses an hypercall to the
hypervisor to give up the timeslice.
In contrast to the SMT yielding this can result in larger latencies.
In some places this latency is unwanted, so another variant
"cpu_relax_lowlatency" was introduced. Before this is used in more
and more places, lets revert the logic and provide a cpu_relax_yield
that can be called in places where yielding is more important than
latency. By default this is the same as cpu_relax on all architectures.Signed-off-by: Christian Borntraeger
Signed-off-by: Peter Zijlstra (Intel)
Cc: Catalin Marinas
Cc: Heiko Carstens
Cc: Linus Torvalds
Cc: Martin Schwidefsky
Cc: Nicholas Piggin
Cc: Noam Camus
Cc: Peter Zijlstra
Cc: Russell King
Cc: Thomas Gleixner
Cc: Will Deacon
Cc: linuxppc-dev@lists.ozlabs.org
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1477386195-32736-2-git-send-email-borntraeger@de.ibm.com
Signed-off-by: Ingo Molnar
25 Oct, 2016
1 commit
-
Its all generic atomic_long_t stuff now.
Tested-by: Jason Low
Signed-off-by: Peter Zijlstra (Intel)
Cc: Andrew Morton
Cc: Linus Torvalds
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar
08 Oct, 2016
1 commit
-
When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative. Suppress
messages for cpus that are idling when they are interrupted and just
emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".We do this by grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the interrupted
PC to see if it lies within that section.This commit suitably tags x86 and tile idle routines, and only adds in
the minimal framework for other architectures.Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com
Signed-off-by: Chris Metcalf
Acked-by: Peter Zijlstra (Intel)
Tested-by: Peter Zijlstra (Intel)
Tested-by: Daniel Thompson [arm]
Tested-by: Petr Mladek
Cc: Aaron Tomlin
Cc: Peter Zijlstra (Intel)
Cc: "Rafael J. Wysocki"
Cc: Russell King
Cc: Thomas Gleixner
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Aug, 2016
1 commit
-
The dma-mapping core and the implementations do not change the DMA
attributes passed by pointer. Thus the pointer can point to const data.
However the attributes do not have to be a bitfield. Instead unsigned
long will do fine:1. This is just simpler. Both in terms of reading the code and setting
attributes. Instead of initializing local attributes on the stack
and passing pointer to it to dma_set_attr(), just set the bits.2. It brings safeness and checking for const correctness because the
attributes are passed by value.Semantic patches for this change (at least most of them):
virtual patch
virtual context@r@
identifier f, attrs;@@
f(...,
- struct dma_attrs *attrs
+ unsigned long attrs
, ...)
{
...
}@@
identifier r.f;
@@
f(...,
- NULL
+ 0
)and
// Options: --all-includes
virtual patch
virtual context@r@
identifier f, attrs;
type t;@@
t f(..., struct dma_attrs *attrs);@@
identifier r.f;
@@
f(...,
- NULL
+ 0
)Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com
Signed-off-by: Krzysztof Kozlowski
Acked-by: Vineet Gupta
Acked-by: Robin Murphy
Acked-by: Hans-Christian Noren Egtvedt
Acked-by: Mark Salter [c6x]
Acked-by: Jesper Nilsson [cris]
Acked-by: Daniel Vetter [drm]
Reviewed-by: Bart Van Assche
Acked-by: Joerg Roedel [iommu]
Acked-by: Fabien Dessenne [bdisp]
Reviewed-by: Marek Szyprowski [vb2-core]
Acked-by: David Vrabel [xen]
Acked-by: Konrad Rzeszutek Wilk [xen swiotlb]
Acked-by: Joerg Roedel [iommu]
Acked-by: Richard Kuo [hexagon]
Acked-by: Geert Uytterhoeven [m68k]
Acked-by: Gerald Schaefer [s390]
Acked-by: Bjorn Andersson
Acked-by: Hans-Christian Noren Egtvedt [avr32]
Acked-by: Vineet Gupta [arc]
Acked-by: Robin Murphy [arm64 and dma-iommu]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Jun, 2016
1 commit
-
After patch "of/platform: Add common method to populate default bus",
it is possible for arch code to remove unnecessary callers of
of_platform_populate with default match table.Cc: Mikael Starvik
Cc: Jesper Nilsson
Signed-off-by: Kefeng Wang
Signed-off-by: Rob Herring
25 May, 2016
1 commit
-
Pull asm-generic cleanup from Arnd Bergmann:
"I have only one patch for asm-generic in this release, this one is
from James Hogan and updates the generic system call table for
renameat2 so we don't need to provide both renameat and renameat2 in
newly added architectures"* tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: Drop renameat syscall from default list
21 May, 2016
1 commit
-
Define HAVE_EXIT_THREAD for archs which want to do something in
exit_thread. For others, let's define exit_thread as an empty inline.This is a cleanup before we change the prototype of exit_thread to
accept a task parameter.[akpm@linux-foundation.org: fix mips]
Signed-off-by: Jiri Slaby
Cc: "David S. Miller"
Cc: "H. Peter Anvin"
Cc: "James E.J. Bottomley"
Cc: Aurelien Jacquiot
Cc: Benjamin Herrenschmidt
Cc: Catalin Marinas
Cc: Chen Liqin
Cc: Chris Metcalf
Cc: Chris Zankel
Cc: David Howells
Cc: Fenghua Yu
Cc: Geert Uytterhoeven
Cc: Guan Xuetao
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Heiko Carstens
Cc: Helge Deller
Cc: Ingo Molnar
Cc: Ivan Kokshaysky
Cc: James Hogan
Cc: Jeff Dike
Cc: Jesper Nilsson
Cc: Jiri Slaby
Cc: Jonas Bonn
Cc: Koichi Yasutake
Cc: Lennox Wu
Cc: Ley Foon Tan
Cc: Mark Salter
Cc: Martin Schwidefsky
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Mikael Starvik
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Ralf Baechle
Cc: Rich Felker
Cc: Richard Henderson
Cc: Richard Kuo
Cc: Richard Weinberger
Cc: Russell King
Cc: Steven Miao
Cc: Thomas Gleixner
Cc: Tony Luck
Cc: Vineet Gupta
Cc: Will Deacon
Cc: Yoshinori Sato
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 May, 2016
1 commit
-
The newer renameat2 syscall provides all the functionality provided by
the renameat syscall and adds flags, so future architectures won't need
to include renameat.Therefore drop the renameat syscall from the generic syscall list unless
__ARCH_WANT_RENAMEAT is defined by the architecture's unistd.h prior to
including asm-generic/unistd.h, and adjust all architectures using the
generic syscall list to define it so that no in-tree architectures are
affected.Signed-off-by: James Hogan
Acked-by: Vineet Gupta
Cc: linux-arch@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: Catalin Marinas
Cc: Will Deacon
Cc: linux-arm-kernel@lists.infradead.org
Cc: Mark Salter
Cc: Aurelien Jacquiot
Cc: linux-c6x-dev@linux-c6x.org
Cc: Richard Kuo
Cc: linux-hexagon@vger.kernel.org
Cc: linux-metag@vger.kernel.org
Cc: Jonas Bonn
Cc: linux@lists.openrisc.net
Cc: Chen Liqin
Cc: Lennox Wu
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Ley Foon Tan
Cc: nios2-dev@lists.rocketboards.org
Cc: Yoshinori Sato
Cc: uclinux-h8-devel@lists.sourceforge.jp
Signed-off-by: Arnd Bergmann
18 Apr, 2016
1 commit
-
Signed-off-by: Adam Buchbinder
Signed-off-by: Jiri Kosina
26 Mar, 2016
1 commit
-
KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.Move the definition of __irq_entry to so that the
users don't need to pull in . Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.Signed-off-by: Alexander Potapenko
Acked-by: Steven Rostedt
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Cc: Andrey Konovalov
Cc: Dmitry Vyukov
Cc: Andrey Ryabinin
Cc: Konstantin Serebryany
Cc: Dmitry Chernenkov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Mar, 2016
1 commit
-
Pull networking updates from David Miller:
"Highlights:1) Support more Realtek wireless chips, from Jes Sorenson.
2) New BPF types for per-cpu hash and arrap maps, from Alexei
Starovoitov.3) Make several TCP sysctls per-namespace, from Nikolay Borisov.
4) Allow the use of SO_REUSEPORT in order to do per-thread processing
of incoming TCP/UDP connections. The muxing can be done using a
BPF program which hashes the incoming packet. From Craig Gallek.5) Add a multiplexer for TCP streams, to provide a messaged based
interface. BPF programs can be used to determine the message
boundaries. From Tom Herbert.6) Add 802.1AE MACSEC support, from Sabrina Dubroca.
7) Avoid factorial complexity when taking down an inetdev interface
with lots of configured addresses. We were doing things like
traversing the entire address less for each address removed, and
flushing the entire netfilter conntrack table for every address as
well.8) Add and use SKB bulk free infrastructure, from Jesper Brouer.
9) Allow offloading u32 classifiers to hardware, and implement for
ixgbe, from John Fastabend.10) Allow configuring IRQ coalescing parameters on a per-queue basis,
from Kan Liang.11) Extend ethtool so that larger link mode masks can be supported.
From David Decotigny.12) Introduce devlink, which can be used to configure port link types
(ethernet vs Infiniband, etc.), port splitting, and switch device
level attributes as a whole. From Jiri Pirko.13) Hardware offload support for flower classifiers, from Amir Vadai.
14) Add "Local Checksum Offload". Basically, for a tunneled packet
the checksum of the outer header is 'constant' (because with the
checksum field filled into the inner protocol header, the payload
of the outer frame checksums to 'zero'), and we can take advantage
of that in various ways. From Edward Cree"* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1548 commits)
bonding: fix bond_get_stats()
net: bcmgenet: fix dma api length mismatch
net/mlx4_core: Fix backward compatibility on VFs
phy: mdio-thunder: Fix some Kconfig typos
lan78xx: add ndo_get_stats64
lan78xx: handle statistics counter rollover
RDS: TCP: Remove unused constant
RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket
net: smc911x: convert pxa dma to dmaengine
team: remove duplicate set of flag IFF_MULTICAST
bonding: remove duplicate set of flag IFF_MULTICAST
net: fix a comment typo
ethernet: micrel: fix some error codes
ip_tunnels, bpf: define IP_TUNNEL_OPTS_MAX and use it
bpf, dst: add and use dst_tclassid helper
bpf: make skb->tc_classid also readable
net: mvneta: bm: clarify dependencies
cls_bpf: reset class and reuse major in da
ldmvsw: Checkpatch sunvnet.c and sunvnet_common.c
ldmvsw: Add ldmvsw.c driver code
...
18 Mar, 2016
1 commit
-
CONFIG_BUG=n && CONFIG_GENERIC_BUG=y make no sense and things break:
In file included from include/linux/page-flags.h:9:0,
from kernel/bounds.c:9:
include/linux/bug.h:91:47: warning: 'struct bug_entry' declared inside parameter list
static inline int is_warning_bug(const struct bug_entry *bug)
^
include/linux/bug.h:91:47: warning: its scope is only this definition or declaration, which is probably not what you want
include/linux/bug.h: In function 'is_warning_bug':
>> include/linux/bug.h:93:12: error: dereferencing pointer to incomplete type
return bug->flags & BUGFLAG_WARNING;Reported-by: kbuild test robot
Cc: Josh Triplett
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Mar, 2016
1 commit
-
This patch updates all instances of csum_tcpudp_magic and
csum_tcpudp_nofold to reflect the types that are usually used as the source
inputs. For example the protocol field is populated based on nexthdr which
is actually an unsigned 8 bit value. The length is usually populated based
on skb->len which is an unsigned integer.This addresses an issue in which the IPv6 function csum_ipv6_magic was
generating a checksum using the full 32b of skb->len while
csum_tcpudp_magic was only using the lower 16 bits. As a result we could
run into issues when attempting to adjust the checksum as there was no
protocol agnostic way to update it.With this change the value is still truncated as many architectures use
"(len + proto) << 8", however this truncation only occurs for values
greater than 16776960 in length and as such is unlikely to occur as we stop
the inner headers at ~64K in size.I did have to make a few minor changes in the arm, mn10300, nios2, and
score versions of the function in order to support these changes as they
were either using things such as an OR to combine the protocol and length,
or were using ntohs to convert the length which would have truncated the
value.I also updated a few spots in terms of whitespace and type differences for
the addresses. Most of this was just to make sure all of the definitions
were in sync going forward.Signed-off-by: Alexander Duyck
Signed-off-by: David S. Miller
