linux-toradex.git/arch/m68k/include, branch v4.3.2

m68k: Define asmlinkage_protect

2015-09-28T07:59:45+00:00

Make sure the compiler does not modify arguments of syscall functions.
This can happen if the compiler generates a tailcall to another
function.  For example, without asmlinkage_protect sys_openat is compiled
into this function:

sys_openat:
	clr.l %d0
	move.w 18(%sp),%d0
	move.l %d0,16(%sp)
	jbra do_sys_open

Note how the fourth argument is modified in place, modifying the register
%d4 that gets restored from this stack slot when the function returns to
user-space.  The caller may expect the register to be unmodified across
system calls.

Signed-off-by: Andreas Schwab 
Signed-off-by: Geert Uytterhoeven 
Cc: stable@vger.kernel.org

m68k: Wire up membarrier

2015-09-28T07:59:44+00:00

$ ./membarrier_test
membarrier MEMBARRIER_CMD_QUERY syscall available.
membarrier: MEMBARRIER_CMD_SHARED success.
membarrier: tests done!
$

Signed-off-by: Geert Uytterhoeven 
Acked-by: Greg Ungerer

m68k: Wire up userfaultfd

2015-09-28T07:59:44+00:00

$ ./userfaultfd 10 99
nr_pages: 2560, nr_pages_per_cpu: 2560
bounces: 98, mode: racing, userfaults: 1121
bounces: 97, mode: rnd, userfaults: 977
bounces: 96, mode:, userfaults: 1119
bounces: 95, mode: rnd racing ver poll, userfaults: 1040
bounces: 94, mode: racing ver poll, userfaults: 1022
bounces: 93, mode: rnd ver poll, userfaults: 946
bounces: 92, mode: ver poll, userfaults: 1115
bounces: 91, mode: rnd racing poll, userfaults: 977
bounces: 90, mode: racing poll, userfaults: 899
bounces: 89, mode: rnd poll, userfaults: 881
bounces: 88, mode: poll, userfaults: 1069
bounces: 87, mode: rnd racing ver, userfaults: 1114
bounces: 86, mode: racing ver, userfaults: 1109
bounces: 85, mode: rnd ver, userfaults: 1165
bounces: 84, mode: ver, userfaults: 1107
bounces: 83, mode: rnd racing, userfaults: 1134
bounces: 82, mode: racing, userfaults: 1105
bounces: 81, mode: rnd, userfaults: 1323
bounces: 80, mode:, userfaults: 1103
bounces: 79, mode: rnd racing ver poll, userfaults: 909
bounces: 78, mode: racing ver poll, userfaults: 1095
bounces: 77, mode: rnd ver poll, userfaults: 951
bounces: 76, mode: ver poll, userfaults: 1099
bounces: 75, mode: rnd racing poll, userfaults: 1035
bounces: 74, mode: racing poll, userfaults: 1097
bounces: 73, mode: rnd poll, userfaults: 1159
bounces: 72, mode: poll, userfaults: 1042
bounces: 71, mode: rnd racing ver, userfaults: 848
bounces: 70, mode: racing ver, userfaults: 1093
bounces: 69, mode: rnd ver, userfaults: 892
bounces: 68, mode: ver, userfaults: 1091
bounces: 67, mode: rnd racing, userfaults: 1219
bounces: 66, mode: racing, userfaults: 1089
bounces: 65, mode: rnd, userfaults: 988
bounces: 64, mode:, userfaults: 1087
bounces: 63, mode: rnd racing ver poll, userfaults: 882
bounces: 62, mode: racing ver poll, userfaults: 984
bounces: 61, mode: rnd ver poll, userfaults: 701
bounces: 60, mode: ver poll, userfaults: 1071
bounces: 59, mode: rnd racing poll, userfaults: 1137
bounces: 58, mode: racing poll, userfaults: 1032
bounces: 57, mode: rnd poll, userfaults: 911
bounces: 56, mode: poll, userfaults: 1079
bounces: 55, mode: rnd racing ver, userfaults: 1106
bounces: 54, mode: racing ver, userfaults: 1077
bounces: 53, mode: rnd ver, userfaults: 886
bounces: 52, mode: ver, userfaults: 1075
bounces: 51, mode: rnd racing, userfaults: 1101
bounces: 50, mode: racing, userfaults: 1073
bounces: 49, mode: rnd, userfaults: 1070
bounces: 48, mode:, userfaults: 1071
bounces: 47, mode: rnd racing ver poll, userfaults: 1077
bounces: 46, mode: racing ver poll, userfaults: 910
bounces: 45, mode: rnd ver poll, userfaults: 1063
bounces: 44, mode: ver poll, userfaults: 1028
bounces: 43, mode: rnd racing poll, userfaults: 1043
bounces: 42, mode: racing poll, userfaults: 1065
bounces: 41, mode: rnd poll, userfaults: 912
bounces: 40, mode: poll, userfaults: 1063
bounces: 39, mode: rnd racing ver, userfaults: 880
bounces: 38, mode: racing ver, userfaults: 1061
bounces: 37, mode: rnd ver, userfaults: 1144
bounces: 36, mode: ver, userfaults: 1059
bounces: 35, mode: rnd racing, userfaults: 967
bounces: 34, mode: racing, userfaults: 1057
bounces: 33, mode: rnd, userfaults: 1076
bounces: 32, mode:, userfaults: 1055
bounces: 31, mode: rnd racing ver poll, userfaults: 997
bounces: 30, mode: racing ver poll, userfaults: 1053
bounces: 29, mode: rnd ver poll, userfaults: 968
bounces: 28, mode: ver poll, userfaults: 978
bounces: 27, mode: rnd racing poll, userfaults: 1008
bounces: 26, mode: racing poll, userfaults: 1049
bounces: 25, mode: rnd poll, userfaults: 900
bounces: 24, mode: poll, userfaults: 1047
bounces: 23, mode: rnd racing ver, userfaults: 988
bounces: 22, mode: racing ver, userfaults: 1045
bounces: 21, mode: rnd ver, userfaults: 1027
bounces: 20, mode: ver, userfaults: 1043
bounces: 19, mode: rnd racing, userfaults: 1017
bounces: 18, mode: racing, userfaults: 1041
bounces: 17, mode: rnd, userfaults: 979
bounces: 16, mode:, userfaults: 1039
bounces: 15, mode: rnd racing ver poll, userfaults: 1134
bounces: 14, mode: racing ver poll, userfaults: 1037
bounces: 13, mode: rnd ver poll, userfaults: 1046
bounces: 12, mode: ver poll, userfaults: 1035
bounces: 11, mode: rnd racing poll, userfaults: 1060
bounces: 10, mode: racing poll, userfaults: 1033
bounces: 9, mode: rnd poll, userfaults: 1003
bounces: 8, mode: poll, userfaults: 929
bounces: 7, mode: rnd racing ver, userfaults: 964
bounces: 6, mode: racing ver, userfaults: 1029
bounces: 5, mode: rnd ver, userfaults: 1053
bounces: 4, mode: ver, userfaults: 1027
bounces: 3, mode: rnd racing, userfaults: 863
bounces: 2, mode: racing, userfaults: 1025
bounces: 1, mode: rnd, userfaults: 1043
bounces: 0, mode:, userfaults: 950

Signed-off-by: Geert Uytterhoeven 
Acked-by: Greg Ungerer

m68k: Wire up direct socket calls

2015-09-28T07:59:43+00:00

Signed-off-by: Geert Uytterhoeven 
Acked-by: Greg Ungerer

genirq: Remove irq argument from irq flow handlers

2015-09-16T13:47:51+00:00

Most interrupt flow handlers do not use the irq argument. Those few
which use it can retrieve the irq number from the irq descriptor.

Remove the argument.

Search and replace was done with coccinelle and some extra helper
scripts around it. Thanks to Julia for her help!

Signed-off-by: Thomas Gleixner 
Cc: Julia Lawall 
Cc: Jiang Liu

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-09-03T22:46:07+00:00

Pull locking and atomic updates from Ingo Molnar:
 "Main changes in this cycle are:

   - Extend atomic primitives with coherent logic op primitives
     (atomic_{or,and,xor}()) and deprecate the old partial APIs
     (atomic_{set,clear}_mask())

     The old ops were incoherent with incompatible signatures across
     architectures and with incomplete support.  Now every architecture
     supports the primitives consistently (by Peter Zijlstra)

   - Generic support for 'relaxed atomics':

       - _acquire/release/relaxed() flavours of xchg(), cmpxchg() and {add,sub}_return()
       - atomic_read_acquire()
       - atomic_set_release()

     This came out of porting qwrlock code to arm64 (by Will Deacon)

   - Clean up the fragile static_key APIs that were causing repeat bugs,
     by introducing a new one:

       DEFINE_STATIC_KEY_TRUE(name);
       DEFINE_STATIC_KEY_FALSE(name);

     which define a key of different types with an initial true/false
     value.

     Then allow:

       static_branch_likely()
       static_branch_unlikely()

     to take a key of either type and emit the right instruction for the
     case.  To be able to know the 'type' of the static key we encode it
     in the jump entry (by Peter Zijlstra)

   - Static key self-tests (by Jason Baron)

   - qrwlock optimizations (by Waiman Long)

   - small futex enhancements (by Davidlohr Bueso)

   - ... and misc other changes"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (63 commits)
  jump_label/x86: Work around asm build bug on older/backported GCCs
  locking, ARM, atomics: Define our SMP atomics in terms of _relaxed() operations
  locking, include/llist: Use linux/atomic.h instead of asm/cmpxchg.h
  locking/qrwlock: Make use of _{acquire|release|relaxed}() atomics
  locking/qrwlock: Implement queue_write_unlock() using smp_store_release()
  locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition
  locking, asm-generic: Add _{relaxed|acquire|release}() variants for 'atomic_long_t'
  locking, asm-generic: Rework atomic-long.h to avoid bulk code duplication
  locking/atomics: Add _{acquire|release|relaxed}() variants of some atomic operations
  locking, compiler.h: Cast away attributes in the WRITE_ONCE() magic
  locking/static_keys: Make verify_keys() static
  jump label, locking/static_keys: Update docs
  locking/static_keys: Provide a selftest
  jump_label: Provide a self-test
  s390/uaccess, locking/static_keys: employ static_branch_likely()
  x86, tsc, locking/static_keys: Employ static_branch_likely()
  locking/static_keys: Add selftest
  locking/static_keys: Add a new static_key interface
  locking/static_keys: Rework update logic
  locking/static_keys: Add static_key_{en,dis}able() helpers
  ...

Merge tag 'v4.2-rc8' into x86/mm, before applying new changes

2015-08-25T07:59:19+00:00

Signed-off-by: Ingo Molnar

arch/*/io.h: Add ioremap_uc() to all architectures

2015-07-29T08:02:36+00:00

This adds ioremap_uc() only for architectures that do not
include asm-generic.h/io.h as that already provides a default
definition for them for both cases where you have CONFIG_MMU
and you do not, and because of this, the number of architectures
this patch address is less than the architectures that the
ioremap_wt() patch addressed, "arch/*/io.h: Add ioremap_wt() to
all architectures").

In order to reduce the number of architectures we have to
modify by adding new architecture IO APIs we'll have to review
the architectures in this patch, see why they can't add
asm-generic.h/io.h or issues that would be created by doing
so and then spread a consistent inclusion of this header
towards the end of their own header. For instance arch/metag
includes the asm-generic/io.h *before* the ioremap*()
definitions, this should be the other way around but only
once we have guard wrappers for the non-MMU case also for
asm-generic/io.h.

Reported-by: Stephen Rothwell 
Signed-off-by: Luis R. Rodriguez 
Cc: Abhilash Kesavan 
Cc: Benjamin Herrenschmidt 
Cc: Borislav Petkov 
Cc: Chris Metcalf 
Cc: David Howells 
Cc: Fengguang Wu 
Cc: Geert Uytterhoeven 
Cc: Greg Kroah-Hartman 
Cc: Greg Ungerer 
Cc: Guenter Roeck 
Cc: Haavard Skinnemoen 
Cc: Hans-Christian Egtvedt 
Cc: Koichi Yasutake 
Cc: Kyle McMartin 
Cc: Linus Torvalds 
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Peter Hurley 
Cc: Peter Zijlstra 
Cc: Rob Herring 
Cc: Thomas Gleixner 
Cc: Toshi Kani 
Cc: Will Deacon 
Cc: linux-am33-list@redhat.com
Cc: linux-arch@vger.kernel.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-sh@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/20150728181713.GB30479@wotan.suse.de
Signed-off-by: Ingo Molnar

atomic: Collapse all atomic_{set,clear}_mask definitions

2015-07-27T12:06:24+00:00

Move the now generic definitions of atomic_{set,clear}_mask() into
linux/atomic.h to avoid endless and pointless repetition.

Also, provide an atomic_andnot() wrapper for those few archs that can
implement that.

Signed-off-by: Peter Zijlstra (Intel) 
Signed-off-by: Thomas Gleixner

atomic: Provide atomic_{or,xor,and}

2015-07-27T12:06:24+00:00

Implement atomic logic ops -- atomic_{or,xor,and}.

These will replace the atomic_{set,clear}_mask functions that are
available on some archs.

Signed-off-by: Peter Zijlstra (Intel) 
Signed-off-by: Thomas Gleixner