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To be compatible with the generic get_compat_sigevent(), the
copy_siginfo_to_user32() and thus copy_siginfo_from_user32()
have to use si_int instead of si_ptr. Using si_ptr means that
for the case of ILP32 compat code running in big-endian mode,
we would end up copying the high 32 bits of the pointer value
into si_int instead of the desired low 32 bits.
Signed-off-by: Chris Metcalf <[email protected]>
Cc: Catalin Marinas <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc
Pull exec domain removal from Richard Weinberger:
"This series removes execution domain support from Linux.
The idea behind exec domains was to support different ABIs. The
feature was never complete nor stable. Let's rip it out and make the
kernel signal handling code less complicated"
* 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (27 commits)
arm64: Removed unused variable
sparc: Fix execution domain removal
Remove rest of exec domains.
arch: Remove exec_domain from remaining archs
arc: Remove signal translation and exec_domain
xtensa: Remove signal translation and exec_domain
xtensa: Autogenerate offsets in struct thread_info
x86: Remove signal translation and exec_domain
unicore32: Remove signal translation and exec_domain
um: Remove signal translation and exec_domain
tile: Remove signal translation and exec_domain
sparc: Remove signal translation and exec_domain
sh: Remove signal translation and exec_domain
s390: Remove signal translation and exec_domain
mn10300: Remove signal translation and exec_domain
microblaze: Remove signal translation and exec_domain
m68k: Remove signal translation and exec_domain
m32r: Remove signal translation and exec_domain
m32r: Autogenerate offsets in struct thread_info
frv: Remove signal translation and exec_domain
...
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Enumeration
- Read capability list as dwords, not bytes (Sean O. Stalley)
Resource management
- Don't check for PNP overlaps with unassigned PCI BARs (Bjorn Helgaas)
- Mark invalid BARs as unassigned (Bjorn Helgaas)
- Show driver, BAR#, and resource on pci_ioremap_bar() failure (Bjorn Helgaas)
- Fail pci_ioremap_bar() on unassigned resources (Bjorn Helgaas)
- Assign resources before drivers claim devices (Yijing Wang)
- Claim bus resources before pci_bus_add_devices() (Yijing Wang)
Power management
- Optimize device state transition delays (Aaron Lu)
- Don't clear ASPM bits when the FADT declares it's unsupported (Matthew Garrett)
Virtualization
- Add ACS quirks for Intel 1G NICs (Alex Williamson)
IOMMU
- Add ptr to OF node arg to of_iommu_configure() (Murali Karicheri)
- Move of_dma_configure() to device.c to help re-use (Murali Karicheri)
- Fix size when dma-range is not used (Murali Karicheri)
- Add helper functions pci_get[put]_host_bridge_device() (Murali Karicheri)
- Add of_pci_dma_configure() to update DMA configuration (Murali Karicheri)
- Update DMA configuration from DT (Murali Karicheri)
- dma-mapping: limit IOMMU mapping size (Murali Karicheri)
- Calculate device DMA masks based on DT dma-range size (Murali Karicheri)
ARM Versatile host bridge driver
- Check for devm_ioremap_resource() failures (Jisheng Zhang)
Broadcom iProc host bridge driver
- Add Broadcom iProc PCIe driver (Ray Jui)
Marvell MVEBU host bridge driver
- Add suspend/resume support (Thomas Petazzoni)
Renesas R-Car host bridge driver
- Fix position of MSI enable bit (Nobuhiro Iwamatsu)
- Write zeroes to reserved PCIEPARL bits (Nobuhiro Iwamatsu)
- Change PCIEPARL and PCIEPARH to PCIEPALR and PCIEPAUR (Nobuhiro Iwamatsu)
- Verify that mem_res is 64K-aligned (Nobuhiro Iwamatsu)
Samsung Exynos host bridge driver
- Fix INTx enablement statement termination error (Jaehoon Chung)
Miscellaneous
- Make a shareable UUID for PCI firmware ACPI _DSM (Aaron Lu)
- Clarify policy for vendor IDs in pci.txt (Michael S. Tsirkin)"
* tag 'pci-v4.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (36 commits)
PCI: Read capability list as dwords, not bytes
PCI: layerscape: Simplify platform_get_resource_byname() failure checking
PCI: keystone: Don't dereference possible NULL pointer
PCI: versatile: Check for devm_ioremap_resource() failures
PCI: Don't clear ASPM bits when the FADT declares it's unsupported
PCI: Clarify policy for vendor IDs in pci.txt
PCI/ACPI: Optimize device state transition delays
PCI: Export pci_find_host_bridge() for use inside PCI core
PCI: Make a shareable UUID for PCI firmware ACPI _DSM
PCI: Fix typo in Thunderbolt kernel message
PCI: exynos: Fix INTx enablement statement termination error
PCI: iproc: Add Broadcom iProc PCIe support
PCI: iproc: Add DT docs for Broadcom iProc PCIe driver
PCI: Export symbols required for loadable host driver modules
PCI: Add ACS quirks for Intel 1G NICs
PCI: mvebu: Add suspend/resume support
PCI: Cleanup control flow
sparc/PCI: Claim bus resources before pci_bus_add_devices()
PCI: Assign resources before drivers claim devices (pci_scan_root_bus())
PCI: Fail pci_ioremap_bar() on unassigned resources
...
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As execution domain support is gone we can remove
signal translation from the signal code and remove
exec_domain from thread_info.
Signed-off-by: Richard Weinberger <[email protected]>
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In preparation of adding another tkr field, rename this one to
tkr_mono. Also rename tk_read_base::base_mono to tk_read_base::base,
since the structure is not specific to CLOCK_MONOTONIC and the mono
name got added to the tk_read_base instance.
Lots of trivial churn.
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: John Stultz <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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Previously, pci_scan_root_bus() created a root PCI bus, enumerated the
devices on it, and called pci_bus_add_devices(), which made the devices
available for drivers to claim them.
Most callers assigned resources to devices after pci_scan_root_bus()
returns, which may be after drivers have claimed the devices. This is
incorrect; the PCI core should not change device resources while a driver
is managing the device.
Remove pci_bus_add_devices() from pci_scan_root_bus() and do it after any
resource assignment in the callers.
Note that ARM's pci_common_init_dev() already called pci_bus_add_devices()
after pci_scan_root_bus(), so we only need to remove the first call:
pci_common_init_dev
pcibios_init_hw
pci_scan_root_bus
pci_bus_add_devices # first call
pci_bus_assign_resources
pci_bus_add_devices # second call
[bhelgaas: changelog, drop "root_bus" var in alpha common_init_pci(),
return failure earlier in mn10300, add "return" in x86 pcibios_scan_root(),
return early if xtensa platform_pcibios_fixup() fails]
Signed-off-by: Yijing Wang <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
CC: Richard Henderson <[email protected]>
CC: Ivan Kokshaysky <[email protected]>
CC: Matt Turner <[email protected]>
CC: David Howells <[email protected]>
CC: Tony Luck <[email protected]>
CC: Michal Simek <[email protected]>
CC: Ralf Baechle <[email protected]>
CC: Koichi Yasutake <[email protected]>
CC: Sebastian Ott <[email protected]>
CC: "David S. Miller" <[email protected]>
CC: Chris Metcalf <[email protected]>
CC: Chris Zankel <[email protected]>
CC: Max Filippov <[email protected]>
CC: Thomas Gleixner <[email protected]>
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Thanks to spatch.
Signed-off-by: Rusty Russell <[email protected]>
Cc: Chris Metcalf <[email protected]>
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printk and friends can now format bitmaps using '%*pb[l]'. cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.
Signed-off-by: Tejun Heo <[email protected]>
Cc: Chris Metcalf <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target. This is because the
restart_block is held in the same memory allocation as the kernel stack.
Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.
Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.
It's also a decent simplification, since the restart code is more or less
identical on all architectures.
[[email protected]: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Al Viro <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: David Miller <[email protected]>
Acked-by: Richard Weinberger <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Russell King <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Haavard Skinnemoen <[email protected]>
Cc: Hans-Christian Egtvedt <[email protected]>
Cc: Steven Miao <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: Aurelien Jacquiot <[email protected]>
Cc: Mikael Starvik <[email protected]>
Cc: Jesper Nilsson <[email protected]>
Cc: David Howells <[email protected]>
Cc: Richard Kuo <[email protected]>
Cc: "Luck, Tony" <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Acked-by: Michael Ellerman <[email protected]> (powerpc)
Tested-by: Michael Ellerman <[email protected]> (powerpc)
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Chen Liqin <[email protected]>
Cc: Lennox Wu <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Chris Zankel <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Guenter Roeck <[email protected]>
Signed-off-by: James Hogan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Enumeration
- Move domain assignment from arm64 to generic code (Lorenzo Pieralisi)
- ARM: Remove artificial dependency on pci_sys_data domain (Lorenzo Pieralisi)
- ARM: Move to generic PCI domains (Lorenzo Pieralisi)
- Generate uppercase hex for modalias var in uevent (Ricardo Ribalda Delgado)
- Add and use generic config accessors on ARM, PowerPC (Rob Herring)
Resource management
- Free resources on failure in of_pci_get_host_bridge_resources() (Lorenzo Pieralisi)
- Fix infinite loop with ROM image of size 0 (Michel Dänzer)
PCI device hotplug
- Handle surprise add even if surprise removal isn't supported (Bjorn Helgaas)
Virtualization
- Mark AMD/ATI VGA devices that don't reset on D3hot->D0 transition (Alex Williamson)
- Add DMA alias quirk for Adaptec 3405 (Alex Williamson)
- Add Wellsburg (X99) to Intel PCH root port ACS quirk (Alex Williamson)
- Add ACS quirk for Emulex NICs (Vasundhara Volam)
MSI
- Fail MSI-X mappings if there's no space assigned to MSI-X BAR (Yijing Wang)
Freescale Layerscape host bridge driver
- Fix platform_no_drv_owner.cocci warnings (Julia Lawall)
NVIDIA Tegra host bridge driver
- Remove unnecessary tegra_pcie_fixup_bridge() (Lucas Stach)
Renesas R-Car host bridge driver
- Fix error handling of irq_of_parse_and_map() (Dmitry Torokhov)
TI Keystone host bridge driver
- Fix error handling of irq_of_parse_and_map() (Dmitry Torokhov)
- Fix misspelling of current function in debug output (Julia Lawall)
Xilinx AXI host bridge driver
- Fix harmless format string warning (Arnd Bergmann)
Miscellaneous
- Use standard parsing functions for ASPM sysfs setters (Chris J Arges)
- Add pci_device_to_OF_node() stub for !CONFIG_OF (Kevin Hao)
- Delete unnecessary NULL pointer checks (Markus Elfring)
- Add and use defines for PCIe Max_Read_Request_Size (Rafał Miłecki)
- Include clk.h instead of clk-private.h (Stephen Boyd)"
* tag 'pci-v3.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits)
PCI: Add pci_device_to_OF_node() stub for !CONFIG_OF
PCI: xilinx: Convert to use generic config accessors
PCI: xgene: Convert to use generic config accessors
PCI: tegra: Convert to use generic config accessors
PCI: rcar: Convert to use generic config accessors
PCI: generic: Convert to use generic config accessors
powerpc/powermac: Convert PCI to use generic config accessors
powerpc/fsl_pci: Convert PCI to use generic config accessors
ARM: ks8695: Convert PCI to use generic config accessors
ARM: sa1100: Convert PCI to use generic config accessors
ARM: integrator: Convert PCI to use generic config accessors
PCI: versatile: Add DT-based ARM Versatile PB PCIe host driver
ARM: dts: versatile: add PCI controller binding
of/pci: Free resources on failure in of_pci_get_host_bridge_resources()
PCI: versatile: Add DT docs for ARM Versatile PB PCIe driver
PCI: Fail MSI-X mappings if there's no space assigned to MSI-X BAR
r8169: use PCI define for Max_Read_Request_Size
[SCSI] esas2r: use PCI define for Max_Read_Request_Size
tile: use PCI define for Max_Read_Request_Size
rapidio/tsi721: use PCI define for Max_Read_Request_Size
...
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Replace a magic number with a PCI #define symbol.
Signed-off-by: Rafał Miłecki <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
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Nothing needs the module pointer any more, and the next patch will
call it from RCU, where the module itself might no longer exist.
Removing the arg is the safest approach.
This just codifies the use of the module_alloc/module_free pattern
which ftrace and bpf use.
Signed-off-by: Rusty Russell <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Cc: Mikael Starvik <[email protected]>
Cc: Jesper Nilsson <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Ley Foon Tan <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: [email protected]
Cc: Ananth N Mavinakayanahalli <[email protected]>
Cc: Anil S Keshavamurthy <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
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Archs have been abusing module_free() to clean up their arch-specific
allocations. Since module_free() is also (ab)used by BPF and trace code,
let's keep it to simple allocations, and provide a hook called before
that.
This means that avr32, ia64, parisc and s390 no longer need to implement
their own module_free() at all. avr32 doesn't need module_finalize()
either.
Signed-off-by: Rusty Russell <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Haavard Skinnemoen <[email protected]>
Cc: Hans-Christian Egtvedt <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
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Pull arch/tile updates from Chris Metcalf:
"Note that one of the changes converts my old [email protected] email
in MAINTAINERS to the [email protected] email that you see on this
email"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: update MAINTAINERS email to EZchip
tile: avoid undefined behavior with regs[TREG_TP] etc
arch: tile: kernel: kgdb.c: Use memcpy() instead of pointer copy one by one
tile: Use the more common pr_warn instead of pr_warning
arch: tile: gxio: Export symbols for module using in 'mpipe.c'
arch: tile: kernel: signal.c: Use __copy_from/to_user() instead of __get/put_user()
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Use the more common pr_warn.
Coalesce formats, realign arguments.
Signed-off-by: Joe Perches <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Coalesce the formats and align arguments.
Signed-off-by: Joe Perches <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Eliminate the unlikely possibility of message interleaving for
early_printk/early_vprintk use.
early_vprintk can be done via the %pV extension so remove this
unnecessary function and change early_printk to have the equivalent
vprintk code.
All uses of early_printk already end with a newline so also remove the
unnecessary newline from the early_printk function.
Signed-off-by: Joe Perches <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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The PCI/MSI irq chip callbacks mask/unmask_msi_irq have been renamed
to pci_msi_mask/unmask_irq to mark them PCI specific. Rename all usage
sites. The conversion helper functions are kept around to avoid
conflicts in next and will be removed after merging into mainline.
Coccinelle assisted conversion. No functional change.
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Russell King <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: [email protected]
Cc: Jiang Liu <[email protected]>
Cc: Jason Cooper <[email protected]>
Cc: Murali Karicheri <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Mohit Kumar <[email protected]>
Cc: Simon Horman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Yijing Wang <[email protected]>
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Rename write_msi_msg() to pci_write_msi_msg() to mark it as PCI
specific.
Signed-off-by: Jiang Liu <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Grant Likely <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Yingjoe Chen <[email protected]>
Cc: Yijing Wang <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
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Not only memcpy() is faster than pointer copy, but also let code more
clearer and simple, which can avoid compiling warning (the original
implementation copy registers by exceeding member array border).
The related warning (with allmodconfig under tile):
CC arch/tile/kernel/kgdb.o
arch/tile/kernel/kgdb.c: In function 'sleeping_thread_to_gdb_regs':
arch/tile/kernel/kgdb.c:140:31: warning: iteration 53u invokes undefined behavior [-Waggressive-loop-optimizations]
*(ptr++) = thread_regs->regs[reg];
^
arch/tile/kernel/kgdb.c:139:2: note: containing loop
for (reg = 0; reg <= TREG_LAST_GPR; reg++)
^
Signed-off-by: Chen Gang <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]>
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And other message logging neatening.
Other miscellanea:
o coalesce formats
o realign arguments
o standardize a couple of macros
o use __func__ instead of embedding the function name
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]>
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__get/put_user()
setup/restore_sigcontext() want to copy all related registers between
user and kernel. So use block copy instead of each registers copy. Then
can let code simple and clearer (which can avoid compiler's warning):
The related warning (with allmodconfig under tile):
CC arch/tile/kernel/signal.o
In file included from include/linux/poll.h:11:0,
from include/linux/ring_buffer.h:7,
from include/linux/ftrace_event.h:5,
from include/trace/syscall.h:6,
from include/linux/syscalls.h:81,
from arch/tile/kernel/signal.c:30:
arch/tile/kernel/signal.c: In function 'setup_sigcontext':
arch/tile/kernel/signal.c:116:31: warning: iteration 53u invokes undefined behavior [-Waggressive-loop-optimizations]
err |= __put_user(regs->regs[i], &sc->gregs[i]);
^
./arch/tile/include/asm/uaccess.h:236:26: note: in definition of macro '__put_user_asm'
: "r" (ptr), "r" (x), "i" (-EFAULT))
^
./arch/tile/include/asm/uaccess.h:297:10: note: in expansion of macro '__put_user_8'
case 8: __put_user_8(x, ptr, __ret); break; \
^
arch/tile/kernel/signal.c:116:10: note: in expansion of macro '__put_user'
err |= __put_user(regs->regs[i], &sc->gregs[i]);
^
arch/tile/kernel/signal.c:115:2: note: containing loop
for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i)
^
Signed-off-by: Chen Gang <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Pull percpu consistent-ops changes from Tejun Heo:
"Way back, before the current percpu allocator was implemented, static
and dynamic percpu memory areas were allocated and handled separately
and had their own accessors. The distinction has been gone for many
years now; however, the now duplicate two sets of accessors remained
with the pointer based ones - this_cpu_*() - evolving various other
operations over time. During the process, we also accumulated other
inconsistent operations.
This pull request contains Christoph's patches to clean up the
duplicate accessor situation. __get_cpu_var() uses are replaced with
with this_cpu_ptr() and __this_cpu_ptr() with raw_cpu_ptr().
Unfortunately, the former sometimes is tricky thanks to C being a bit
messy with the distinction between lvalues and pointers, which led to
a rather ugly solution for cpumask_var_t involving the introduction of
this_cpu_cpumask_var_ptr().
This converts most of the uses but not all. Christoph will follow up
with the remaining conversions in this merge window and hopefully
remove the obsolete accessors"
* 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (38 commits)
irqchip: Properly fetch the per cpu offset
percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t -fix
ia64: sn_nodepda cannot be assigned to after this_cpu conversion. Use __this_cpu_write.
percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t
Revert "powerpc: Replace __get_cpu_var uses"
percpu: Remove __this_cpu_ptr
clocksource: Replace __this_cpu_ptr with raw_cpu_ptr
sparc: Replace __get_cpu_var uses
avr32: Replace __get_cpu_var with __this_cpu_write
blackfin: Replace __get_cpu_var uses
tile: Use this_cpu_ptr() for hardware counters
tile: Replace __get_cpu_var uses
powerpc: Replace __get_cpu_var uses
alpha: Replace __get_cpu_var
ia64: Replace __get_cpu_var uses
s390: cio driver &__get_cpu_var replacements
s390: Replace __get_cpu_var uses
mips: Replace __get_cpu_var uses
MIPS: Replace __get_cpu_var uses in FPU emulator.
arm: Replace __this_cpu_ptr with raw_cpu_ptr
...
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This change adds support for clock_gettime with CLOCK_REALTIME
and CLOCK_MONOTONIC using vDSO. It also updates the vdso
struct nomenclature used for the clocks to match the x86 code
to keep it easier to update going forward.
We also support the *_COARSE clockid_t, for apps that want speed
but aren't concerned about fine-grained timestamps; this saves
about 20 cycles per call (see http://lwn.net/Articles/342018/).
Signed-off-by: Chris Metcalf <[email protected]>
Acked-by: John Stultz <[email protected]>
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Signed-off-by: Chris Metcalf <[email protected]>
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Use standard __init_begin and __init_end instead.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Cc: Chris Metcalf <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]>
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ARRAY_SIZE is more concise to use when the size of an array is divided
by the size of its type or the size of its first element.
The semantic patch that makes this change is as follows:
// <smpl>
@i@
@@
@@
type T;
T[] E;
@@
- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)
// </smpl>
Signed-off-by: Himangi Saraogi <[email protected]>
Acked-by: Julia Lawall <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]>
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Fix building errors occuring due to a missing export of
flush_icache_range() in
kisskb.ellerman.id.au/kisskb/buildresult/11677809/
ERROR: "flush_icache_range" [drivers/misc/lkdtm.ko] undefined!
Signed-off-by: Pranith Kumar <[email protected]>
Reported-by: Geert Uytterhoeven <[email protected]>
Acked-by: Vineet Gupta <[email protected]> [arc]
Acked-by: Richard Kuo <[email protected]> [hexagon]
Cc: Chris Metcalf <[email protected]>
Cc: Chris Zankel <[email protected]>
Acked-by: Max Filippov <[email protected]> [xtensa]
Cc: Noam Camus <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Acked-by: Zhigang Lu <[email protected]> [tile]
Cc: Kirill Tkhai <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
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__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Acked-by: Chris Metcalf <[email protected]>
Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc
Pull arch signal handling cleanup from Richard Weinberger:
"This patch series moves all remaining archs to the get_signal(),
signal_setup_done() and sigsp() functions.
Currently these archs use open coded variants of the said functions.
Further, unused parameters get removed from get_signal_to_deliver(),
tracehook_signal_handler() and signal_delivered().
At the end of the day we save around 500 lines of code."
* 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits)
powerpc: Use sigsp()
openrisc: Use sigsp()
mn10300: Use sigsp()
mips: Use sigsp()
microblaze: Use sigsp()
metag: Use sigsp()
m68k: Use sigsp()
m32r: Use sigsp()
hexagon: Use sigsp()
frv: Use sigsp()
cris: Use sigsp()
c6x: Use sigsp()
blackfin: Use sigsp()
avr32: Use sigsp()
arm64: Use sigsp()
arc: Use sigsp()
sas_ss_flags: Remove nested ternary if
Rip out get_signal_to_deliver()
Clean up signal_delivered()
tracehook_signal_handler: Remove sig, info, ka and regs
...
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The core mm code will provide a default gate area based on
FIXADDR_USER_START and FIXADDR_USER_END if
!defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR).
This default is only useful for ia64. arm64, ppc, s390, sh, tile, 64-bit
UML, and x86_32 have their own code just to disable it. arm, 32-bit UML,
and x86_64 have gate areas, but they have their own implementations.
This gets rid of the default and moves the code into ia64.
This should save some code on architectures without a gate area: it's now
possible to inline the gate_area functions in the default case.
Signed-off-by: Andy Lutomirski <[email protected]>
Acked-by: Nathan Lynch <[email protected]>
Acked-by: H. Peter Anvin <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]> [in principle]
Acked-by: Richard Weinberger <[email protected]> [for um]
Acked-by: Will Deacon <[email protected]> [for arm64]
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Jeff Dike <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Nathan Lynch <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Signed-off-by: Alexey Dobriyan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Currently map_vm_area() takes (struct page *** pages) as third argument,
and after mapping, it moves (*pages) to point to (*pages +
nr_mappped_pages).
It looks like this kind of increment is useless to its caller these
days. The callers don't care about the increments and actually they're
trying to avoid this by passing another copy to map_vm_area().
The caller can always guarantee all the pages can be mapped into vm_area
as specified in first argument and the caller only cares about whether
map_vm_area() fails or not.
This patch cleans up the pointer movement in map_vm_area() and updates
its callers accordingly.
Signed-off-by: WANG Chao <[email protected]>
Cc: Zhang Yanfei <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Nitin Gupta <[email protected]>
Cc: Rusty Russell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Use the more generic functions get_signal() signal_setup_done()
for signal delivery.
Signed-off-by: Richard Weinberger <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer and time updates from Thomas Gleixner:
"A rather large update of timers, timekeeping & co
- Core timekeeping code is year-2038 safe now for 32bit machines.
Now we just need to fix all in kernel users and the gazillion of
user space interfaces which rely on timespec/timeval :)
- Better cache layout for the timekeeping internal data structures.
- Proper nanosecond based interfaces for in kernel users.
- Tree wide cleanup of code which wants nanoseconds but does hoops
and loops to convert back and forth from timespecs. Some of it
definitely belongs into the ugly code museum.
- Consolidation of the timekeeping interface zoo.
- A fast NMI safe accessor to clock monotonic for tracing. This is a
long standing request to support correlated user/kernel space
traces. With proper NTP frequency correction it's also suitable
for correlation of traces accross separate machines.
- Checkpoint/restart support for timerfd.
- A few NOHZ[_FULL] improvements in the [hr]timer code.
- Code move from kernel to kernel/time of all time* related code.
- New clocksource/event drivers from the ARM universe. I'm really
impressed that despite an architected timer in the newer chips SoC
manufacturers insist on inventing new and differently broken SoC
specific timers.
[ Ed. "Impressed"? I don't think that word means what you think it means ]
- Another round of code move from arch to drivers. Looks like most
of the legacy mess in ARM regarding timers is sorted out except for
a few obnoxious strongholds.
- The usual updates and fixlets all over the place"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (114 commits)
timekeeping: Fixup typo in update_vsyscall_old definition
clocksource: document some basic timekeeping concepts
timekeeping: Use cached ntp_tick_length when accumulating error
timekeeping: Rework frequency adjustments to work better w/ nohz
timekeeping: Minor fixup for timespec64->timespec assignment
ftrace: Provide trace clocks monotonic
timekeeping: Provide fast and NMI safe access to CLOCK_MONOTONIC
seqcount: Add raw_write_seqcount_latch()
seqcount: Provide raw_read_seqcount()
timekeeping: Use tk_read_base as argument for timekeeping_get_ns()
timekeeping: Create struct tk_read_base and use it in struct timekeeper
timekeeping: Restructure the timekeeper some more
clocksource: Get rid of cycle_last
clocksource: Move cycle_last validation to core code
clocksource: Make delta calculation a function
wireless: ath9k: Get rid of timespec conversions
drm: vmwgfx: Use nsec based interfaces
drm: i915: Use nsec based interfaces
timekeeping: Provide ktime_get_raw()
hangcheck-timer: Use ktime_get_ns()
...
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The members of the new struct are the required ones for the new NMI
safe accessor to clcok monotonic. In order to reuse the existing
timekeeping code and to make the update of the fast NMI safe
timekeepers a simple memcpy use the struct for the timekeeper as well
and convert all users.
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Signed-off-by: John Stultz <[email protected]>
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cycle_last was added to the clocksource to support the TSC
validation. We moved that to the core code, so we can get rid of the
extra copy.
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: John Stultz <[email protected]>
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The code was only halfarsed converted to the new VSDO update mechanism
and still uses the inaccurate base value which lacks the fractional
part of xtime_nsec. Fix it up.
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: John Stultz <[email protected]>
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Nothing sets function_trace_stop to disable function tracing anymore.
Remove the check for it in the arch code.
Cc: Chris Metcalf <[email protected]>
Acked-by: Zhigang Lu<[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
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Pull arch/tile changes from Chris Metcalf:
"These mostly just address smaller issues reported to me"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch: tile: kernel: unaligned.c: Cleaning up uninitialized variables
drivers/tty/hvc/hvc_tile.c: use PTR_ERR_OR_ZERO
replace strict_strto* call with kstrto*
tile: Update comments for generic idle conversion
tile: cleanup the comment in init_pgprot
tile: use BOOTMEM_DEFAULT instead of magic number 0 for reserve_bootmem flags
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There is a risk that the variable will be used without being initialized.
This was largely found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]> [minor cleanups]
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This typedef is unnecessary and should just be removed.
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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remove obsolete calls to strict_strto* and replace them
with kstrto* calls accordingly.
Signed-off-by: Daniel Walter <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]>
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Get rid of the private allocator and switch over to sparse IRQs.
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Grant Likely <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
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No functional change. Just convert to the new interface.
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Grant Likely <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
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We want to convert the drivers over to the new interface and finally
tile to sparse irqs. Implement irq_alloc/free_hwirq() for step by step
migration.
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Grant Likely <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
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Use macro flag BOOTMEM_DEFAULT instead of magic number 0 for reserve_bootmem.
Signed-off-by: Wang Sheng-Hui <[email protected]>
Signed-off-by: Chris Metcalf <[email protected]>
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Pull arch/tile updates from Chris Metcalf:
"These fix a few stray build issues seen in linux-next, and also add
the minimal required support for perf to tilegx"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: remove unused variable 'devcap'
tile: Fix vDSO compilation issue with allyesconfig
perf tools: Allow building for tile
tile/perf: Support perf_events on tilegx and tilepro
tile: Enable NMIs on return from handle_nmi() without errors
tile: Add support for handling PMC hardware
tile: don't use __get_cpu_var() with structure-typed arguments
tile: avoid overflow in ns2cycles
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Commit 503275bf37 removed the use of the variable but not
the variable itself.
Signed-off-by: Chris Metcalf <[email protected]>
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