20 Jan, 2015
2 commits
-
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
Acked-by: Alexei Starovoitov
Cc: Mikael Starvik
Cc: Jesper Nilsson
Cc: Ralf Baechle
Cc: Ley Foon Tan
Cc: Benjamin Herrenschmidt
Cc: Chris Metcalf
Cc: Steven Rostedt
Cc: x86@kernel.org
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: Masami Hiramatsu
Cc: linux-cris-kernel@axis.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: nios2-dev@lists.rocketboards.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: sparclinux@vger.kernel.org
Cc: netdev@vger.kernel.org -
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
Cc: Chris Metcalf
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Tony Luck
Cc: Fenghua Yu
Cc: "James E.J. Bottomley"
Cc: Helge Deller
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: linux-kernel@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-s390@vger.kernel.org
17 Dec, 2014
1 commit
-
Pull arch/tile updates from Chris Metcalf:
"Note that one of the changes converts my old cmetcalf@tilera.com email
in MAINTAINERS to the cmetcalf@ezchip.com 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()
12 Dec, 2014
1 commit
-
Pull networking updates from David Miller:
1) New offloading infrastructure and example 'rocker' driver for
offloading of switching and routing to hardware.This work was done by a large group of dedicated individuals, not
limited to: Scott Feldman, Jiri Pirko, Thomas Graf, John Fastabend,
Jamal Hadi Salim, Andy Gospodarek, Florian Fainelli, Roopa Prabhu2) Start making the networking operate on IOV iterators instead of
modifying iov objects in-situ during transfers. Thanks to Al Viro
and Herbert Xu.3) A set of new netlink interfaces for the TIPC stack, from Richard
Alpe.4) Remove unnecessary looping during ipv6 routing lookups, from Martin
KaFai Lau.5) Add PAUSE frame generation support to gianfar driver, from Matei
Pavaluca.6) Allow for larger reordering levels in TCP, which are easily
achievable in the real world right now, from Eric Dumazet.7) Add a variable of napi_schedule that doesn't need to disable cpu
interrupts, from Eric Dumazet.8) Use a doubly linked list to optimize neigh_parms_release(), from
Nicolas Dichtel.9) Various enhancements to the kernel BPF verifier, and allow eBPF
programs to actually be attached to sockets. From Alexei
Starovoitov.10) Support TSO/LSO in sunvnet driver, from David L Stevens.
11) Allow controlling ECN usage via routing metrics, from Florian
Westphal.12) Remote checksum offload, from Tom Herbert.
13) Add split-header receive, BQL, and xmit_more support to amd-xgbe
driver, from Thomas Lendacky.14) Add MPLS support to openvswitch, from Simon Horman.
15) Support wildcard tunnel endpoints in ipv6 tunnels, from Steffen
Klassert.16) Do gro flushes on a per-device basis using a timer, from Eric
Dumazet. This tries to resolve the conflicting goals between the
desired handling of bulk vs. RPC-like traffic.17) Allow userspace to ask for the CPU upon what a packet was
received/steered, via SO_INCOMING_CPU. From Eric Dumazet.18) Limit GSO packets to half the current congestion window, from Eric
Dumazet.19) Add a generic helper so that all drivers set their RSS keys in a
consistent way, from Eric Dumazet.20) Add xmit_more support to enic driver, from Govindarajulu
Varadarajan.21) Add VLAN packet scheduler action, from Jiri Pirko.
22) Support configurable RSS hash functions via ethtool, from Eyal
Perry.* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1820 commits)
Fix race condition between vxlan_sock_add and vxlan_sock_release
net/macb: fix compilation warning for print_hex_dump() called with skb->mac_header
net/mlx4: Add support for A0 steering
net/mlx4: Refactor QUERY_PORT
net/mlx4_core: Add explicit error message when rule doesn't meet configuration
net/mlx4: Add A0 hybrid steering
net/mlx4: Add mlx4_bitmap zone allocator
net/mlx4: Add a check if there are too many reserved QPs
net/mlx4: Change QP allocation scheme
net/mlx4_core: Use tasklet for user-space CQ completion events
net/mlx4_core: Mask out host side virtualization features for guests
net/mlx4_en: Set csum level for encapsulated packets
be2net: Export tunnel offloads only when a VxLAN tunnel is created
gianfar: Fix dma check map error when DMA_API_DEBUG is enabled
cxgb4/csiostor: Don't use MASTER_MUST for fw_hello call
net: fec: only enable mdio interrupt before phy device link up
net: fec: clear all interrupt events to support i.MX6SX
net: fec: reset fep link status in suspend function
net: sock: fix access via invalid file descriptor
net: introduce helper macro for_each_cmsghdr
...
11 Dec, 2014
5 commits
-
Use the more common pr_warn.
Coalesce formats, realign arguments.
Signed-off-by: Joe Perches
Acked-by: Chris Metcalf
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Coalesce the formats and align arguments.
Signed-off-by: Joe Perches
Acked-by: Chris Metcalf
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
Acked-by: Chris Metcalf
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
As there are now no remaining users of arch_fast_hash(), lets kill
it entirely.This basically reverts commit 71ae8aac3e19 ("lib: introduce arch
optimized hash library") and follow-up work, that is f.e., commit
237217546d44 ("lib: hash: follow-up fixups for arch hash"),
commit e3fec2f74f7f ("lib: Add missing arch generic-y entries for
asm-generic/hash.h") and last but not least commit 6a02652df511
("perf tools: Fix include for non x86 architectures").Cc: Francesco Fusco
Cc: Thomas Graf
Cc: Arnaldo Carvalho de Melo
Signed-off-by: Daniel Borkmann
Signed-off-by: David S. Miller -
Pull irq domain updates from Thomas Gleixner:
"The real interesting irq updates:- Support for hierarchical irq domains:
For complex interrupt routing scenarios where more than one
interrupt related chip is involved we had no proper representation
in the generic interrupt infrastructure so far. That made people
implement rather ugly constructs in their nested irq chip
implementations. The main offenders are x86 and arm/gic.To distangle that mess we have now hierarchical irqdomains which
seperate the various interrupt chips and connect them via the
hierarchical domains. That keeps the domain specific details
internal to the particular hierarchy level and removes the
criss/cross referencing of chip internals. The resulting hierarchy
for a complex x86 system will look like this:vector mapped: 74
msi-0 mapped: 2
dmar-ir-1 mapped: 69
ioapic-1 mapped: 4
ioapic-0 mapped: 20
pci-msi-2 mapped: 45
dmar-ir-0 mapped: 3
ioapic-2 mapped: 1
pci-msi-1 mapped: 2
htirq mapped: 0Neither ioapic nor pci-msi know about the dmar interrupt remapping
between themself and the vector domain. If interrupt remapping is
disabled ioapic and pci-msi become direct childs of the vector
domain.In hindsight we should have done that years ago, but in hindsight
we always know better :)- Support for generic MSI interrupt domain handling
We have more and more non PCI related MSI interrupts, so providing
a generic infrastructure for this is better than having all
affected architectures implementing their own private hacks.- Support for PCI-MSI interrupt domain handling, based on the generic
MSI support.This part carries the pci/msi branch from Bjorn Helgaas pci tree to
avoid a massive conflict. The PCI/MSI parts are acked by Bjorn.I have two more branches on top of this. The full conversion of x86
to hierarchical domains and a partial conversion of arm/gic"* 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
genirq: Move irq_chip_write_msi_msg() helper to core
PCI/MSI: Allow an msi_controller to be associated to an irq domain
PCI/MSI: Provide mechanism to alloc/free MSI/MSIX interrupt from irqdomain
PCI/MSI: Enhance core to support hierarchy irqdomain
PCI/MSI: Move cached entry functions to irq core
genirq: Provide default callbacks for msi_domain_ops
genirq: Introduce msi_domain_alloc/free_irqs()
asm-generic: Add msi.h
genirq: Add generic msi irq domain support
genirq: Introduce callback irq_chip.irq_write_msi_msg
genirq: Work around __irq_set_handler vs stacked domains ordering issues
irqdomain: Introduce helper function irq_domain_add_hierarchy()
irqdomain: Implement a method to automatically call parent domains alloc/free
genirq: Introduce helper irq_domain_set_info() to reduce duplicated code
genirq: Split out flow handler typedefs into seperate header file
genirq: Add IRQ_SET_MASK_OK_DONE to support stacked irqchip
genirq: Introduce irq_chip.irq_compose_msi_msg() to support stacked irqchip
genirq: Add more helper functions to support stacked irq_chip
genirq: Introduce helper functions to support stacked irq_chip
irqdomain: Do irq_find_mapping and set_type for hierarchy irqdomain in case OF
...
30 Nov, 2014
1 commit
-
In commit 9c62a68d13119a1ca9718381d97b0cb415ff4e9d ("netpoll:
Remove dead packet receive code (CONFIG_NETPOLL_TRAP)") this
Kconfig option was removed. So remove references to it from
all defconfigs as well.Signed-off-by: Paul Gortmaker
Signed-off-by: David S. Miller
23 Nov, 2014
2 commits
-
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
Cc: Bjorn Helgaas
Cc: Russell King
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: "David S. Miller"
Cc: Chris Metcalf
Cc: x86@kernel.org
Cc: Jiang Liu
Cc: Jason Cooper
Cc: Murali Karicheri
Cc: Thierry Reding
Cc: Mohit Kumar
Cc: Simon Horman
Cc: Michal Simek
Cc: Yijing Wang -
Rename write_msi_msg() to pci_write_msi_msg() to mark it as PCI
specific.Signed-off-by: Jiang Liu
Cc: Bjorn Helgaas
Cc: Grant Likely
Cc: Marc Zyngier
Cc: Yingjoe Chen
Cc: Yijing Wang
Signed-off-by: Thomas Gleixner
13 Nov, 2014
2 commits
-
Recent compilers warn about accesses to arrays past the end,
which is supported for pt_regs and sigcontext with the
intended alias past the end of regs[] to sp, tp, and lr
using TREG_SP, TREG_TP, and TREG_LR.Make the intended usage explict by providing an anonymous
union of regs[56] on the one hand, and a short __regs[53]
on the other followed by the sp, tp, and lr fields, so the
aliasing is done explicitly and is visible to the compiler.Reviewed-by: Jeff Epler
Signed-off-by: Chris Metcalf -
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
Signed-off-by: Chris Metcalf
12 Nov, 2014
2 commits
-
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 nameSigned-off-by: Joe Perches
Signed-off-by: Chris Metcalf -
'gxio_mpipe_adjust_timestamp', 'gxio_mpipe_link_instance',
'gxio_mpipe_get_timestamp', and 'gxio_mpipe_set_timestamp' may be use by
other tile modules, so export them.The related error (with allmodconfig under tile):
MODPOST 4002 modules
ERROR: "gxio_mpipe_link_instance" [drivers/net/ethernet/tile/tile_net.ko] undefined!
ERROR: "gxio_mpipe_get_timestamp" [drivers/net/ethernet/tile/tile_net.ko] undefined!
ERROR: "gxio_mpipe_set_timestamp" [drivers/net/ethernet/tile/tile_net.ko] undefined!
ERROR: "gxio_mpipe_adjust_timestamp" [drivers/net/ethernet/tile/tile_net.ko] undefined!Signed-off-by: Chen Gang
Signed-off-by: Chris Metcalf
04 Nov, 2014
1 commit
-
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
Signed-off-by: Chris Metcalf
21 Oct, 2014
1 commit
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write{b,w,l,q}_relaxed are implemented by some architectures in order to
permit memory-mapped I/O accesses with weaker barrier semantics than the
non-relaxed variants.This patch adds dummy macros for the write accessors to tile, in the
same vein as the dummy definitions for the relaxed read accessors.Acked-by: Chris Metcalf
Signed-off-by: Will Deacon
15 Oct, 2014
1 commit
-
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
...
09 Oct, 2014
1 commit
-
Pull timer fixes from Ingo Molnar:
"Main changes:- Fix the deadlock reported by Dave Jones et al
- Clean up and fix nohz_full interaction with arch abilities
- nohz init code consolidation/cleanup"* 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
nohz: nohz full depends on irq work self IPI support
nohz: Consolidate nohz full init code
arm64: Tell irq work about self IPI support
arm: Tell irq work about self IPI support
x86: Tell irq work about self IPI support
irq_work: Force raised irq work to run on irq work interrupt
irq_work: Introduce arch_irq_work_has_interrupt()
nohz: Move nohz full init call to tick init
03 Oct, 2014
1 commit
-
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
Acked-by: John Stultz
02 Oct, 2014
6 commits
-
Signed-off-by: Chris Metcalf
-
Both strncpy and strlcpy suffer from the fact that they do
partial copies of strings into the destination when the target
buffer is too small. This is frequently pointless since an
overflow of the target buffer may make the result invalid.strncpy() makes it relatively hard to even detect the error
condition, and with strlcpy() you have to duplicate the buffer
size parameter to test to see if the result exceeds it.
By returning zero in the failure case, we both make testing
for it easy, and by simply not copying anything in that case,
we make it mandatory for callers to test the error code.To catch lazy programmers who don't check, we also place a NUL at
the start of the destination buffer (if there is space) to
ensure that the result is an invalid string.At some point it may make sense to promote strscpy() to
a global platform-independent function, but other than the
reviewers, no one was interested on LKML, so for now leave
the strscpy() function as file-static.Reviewed-by: Randy Dunlap
Reviewed-by: Rickard Strandqvist
Signed-off-by: Chris Metcalf -
Signed-off-by: Chris Metcalf
-
Signed-off-by: Chris Metcalf
-
Use standard __init_begin and __init_end instead.
Signed-off-by: Geert Uytterhoeven
Cc: Chris Metcalf
Signed-off-by: Chris Metcalf -
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:
//
@i@
@@@@
type T;
T[] E;
@@- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)
//Signed-off-by: Himangi Saraogi
Acked-by: Julia Lawall
Signed-off-by: Chris Metcalf
14 Sep, 2014
1 commit
-
The nohz full code needs irq work to trigger its own interrupt so that
the subsystem can work even when the tick is stopped.Lets introduce arch_irq_work_has_interrupt() that archs can override to
tell about their support for this ability.Signed-off-by: Peter Zijlstra
Cc: Ingo Molnar
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Frederic Weisbecker
30 Aug, 2014
2 commits
-
Fix building errors occuring due to a missing export of
flush_icache_range() inkisskb.ellerman.id.au/kisskb/buildresult/11677809/
ERROR: "flush_icache_range" [drivers/misc/lkdtm.ko] undefined!
Signed-off-by: Pranith Kumar
Reported-by: Geert Uytterhoeven
Acked-by: Vineet Gupta [arc]
Acked-by: Richard Kuo [hexagon]
Cc: Chris Metcalf
Cc: Chris Zankel
Acked-by: Max Filippov [xtensa]
Cc: Noam Camus
Cc: Masami Hiramatsu
Acked-by: Zhigang Lu [tile]
Cc: Kirill Tkhai
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
New system call depends on crypto. As it did not have a separate config
option, CONFIG_KEXEC was modified to select CRYPTO and CRYPTO_SHA256.But now previous patch introduced a new config option for new syscall.
So CONFIG_KEXEC does not require crypto. Remove that dependency.Signed-off-by: Vivek Goyal
Cc: Eric Biederman
Cc: H. Peter Anvin
Cc: Shaun Ruffell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Aug, 2014
2 commits
-
Signed-off-by: Christoph Lameter
Signed-off-by: Tejun Heo -
__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
Signed-off-by: Christoph Lameter
Signed-off-by: Tejun Heo
10 Aug, 2014
1 commit
-
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
...
09 Aug, 2014
3 commits
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Load purgatory code in RAM and relocate it based on the location.
Relocation code has been inspired by module relocation code and purgatory
relocation code in kexec-tools.Also compute the checksums of loaded kexec segments and store them in
purgatory.Arch independent code provides this functionality so that arch dependent
bootloaders can make use of it.Helper functions are provided to get/set symbol values in purgatory which
are used by bootloaders later to set things like stack and entry point of
second kernel etc.Signed-off-by: Vivek Goyal
Cc: Borislav Petkov
Cc: Michael Kerrisk
Cc: Yinghai Lu
Cc: Eric Biederman
Cc: H. Peter Anvin
Cc: Matthew Garrett
Cc: Greg Kroah-Hartman
Cc: Dave Young
Cc: WANG Chao
Cc: Baoquan He
Cc: Andy Lutomirski
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
Acked-by: Nathan Lynch
Acked-by: H. Peter Anvin
Acked-by: Benjamin Herrenschmidt [in principle]
Acked-by: Richard Weinberger [for um]
Acked-by: Will Deacon [for arm64]
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Tony Luck
Cc: Fenghua Yu
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Chris Metcalf
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Nathan Lynch
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Aug, 2014
3 commits
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Merge incoming from Andrew Morton:
- Various misc things.
- arch/sh updates.
- Part of ocfs2. Review is slow.
- Slab updates.
- Most of -mm.
- printk updates.
- lib/ updates.
- checkpatch updates.* emailed patches from Andrew Morton : (226 commits)
checkpatch: update $declaration_macros, add uninitialized_var
checkpatch: warn on missing spaces in broken up quoted
checkpatch: fix false positives for --strict "space after cast" test
checkpatch: fix false positive MISSING_BREAK warnings with --file
checkpatch: add test for native c90 types in unusual order
checkpatch: add signed generic types
checkpatch: add short int to c variable types
checkpatch: add for_each tests to indentation and brace tests
checkpatch: fix brace style misuses of else and while
checkpatch: add --fix option for a couple OPEN_BRACE misuses
checkpatch: use the correct indentation for which()
checkpatch: add fix_insert_line and fix_delete_line helpers
checkpatch: add ability to insert and delete lines to patch/file
checkpatch: add an index variable for fixed lines
checkpatch: warn on break after goto or return with same tab indentation
checkpatch: emit a warning on file add/move/delete
checkpatch: add test for commit id formatting style in commit log
checkpatch: emit fewer kmalloc_array/kcalloc conversion warnings
checkpatch: improve "no space after cast" test
checkpatch: allow multiple const * types
... -
Pull SCSI updates from James Bottomley:
"This patch set consists of the usual driver updates (ufs, storvsc,
pm8001 hpsa). It also has removal of the user space target driver
code (everyone is using LIO now), a partial PCI MSI-X update, more
multi-queue updates, conversion to 64 bit LUNs (so we could
theoretically cope with any LUN returned by a device) and placeholder
support for the ZBC device type (Shingle drives), plus an assortment
of minor updates and bug fixes"* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (143 commits)
scsi: do not issue SCSI RSOC command to Promise Vtrak E610f
vmw_pvscsi: Use pci_enable_msix_exact() instead of pci_enable_msix()
pm8001: Fix invalid return when request_irq() failed
lpfc: Remove superfluous call to pci_disable_msix()
isci: Use pci_enable_msix_exact() instead of pci_enable_msix()
bfa: Use pci_enable_msix_exact() instead of pci_enable_msix()
bfa: Cleanup bfad_setup_intr() function
bfa: Do not call pci_enable_msix() after it failed once
fnic: Use pci_enable_msix_exact() instead of pci_enable_msix()
scsi: use short driver name for per-driver cmd slab caches
scsi_debug: support scsi-mq, queues and locks
Drivers: add blist flags
scsi: ufs: fix endianness sparse warnings
scsi: ufs: make undeclared functions static
bnx2i: Update driver version to 2.7.10.1
pm8001: fix a memory leak in nvmd_resp
pm8001: fix update_flash
pm8001: fix a memory leak in flash_update
pm8001: Cleaning up uninitialized variables
pm8001: Fix to remove null pointer checks that could never happen
... -
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
Cc: Zhang Yanfei
Acked-by: Greg Kroah-Hartman
Cc: Minchan Kim
Cc: Nitin Gupta
Cc: Rusty Russell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Aug, 2014
1 commit
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Use the more generic functions get_signal() signal_setup_done()
for signal delivery.Signed-off-by: Richard Weinberger
Acked-by: Chris Metcalf
