linux-toradex.git/arch/x86/lib/Makefile, branch v4.4.77

x86/asm/entry: Move the 'thunk' functions to arch/x86/entry/

2015-06-04T05:37:33+00:00

These are all calling x86 entry code functions, so move them close
to other entry code.

Change lib-y to obj-y: there's no real difference between the two
as we don't really drop any of them during the linking stage, and
obj-y is the more common approach for core kernel object code.

Cc: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Thomas Gleixner 
Cc: Andy Lutomirski 
Cc: Denys Vlasenko 
Cc: Brian Gerst 
Cc: Peter Zijlstra 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

x86/asm/uaccess: Get rid of copy_user_nocache_64.S

2015-05-14T05:25:35+00:00

Move __copy_user_nocache() to arch/x86/lib/copy_user_64.S and
kill the containing file.

No functionality change.

Signed-off-by: Borislav Petkov 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1431538944-27724-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

net, lib: kill arch_fast_hash library bits

2014-12-10T20:17:46+00:00

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

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2014-10-13T16:14:50+00:00

Pull x86 asm updates from Ingo Molnar:
 "The changes in this cycle were:

   - Speed up the x86 __preempt_schedule() implementation
   - Fix/improve low level asm code debug info annotations"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Unwind-annotate thunk_32.S
  x86: Improve cmpxchg8b_emu.S
  x86: Improve cmpxchg16b_emu.S
  x86/lib/Makefile: Remove the unnecessary "+= thunk_64.o"
  x86: Speed up ___preempt_schedule*() by using THUNK helpers

x86/lib/Makefile: Remove the unnecessary "+= thunk_64.o"

2014-09-24T13:15:39+00:00

Trivial. We have "lib-y += thunk_$(BITS).o" at the start, no
need to add thunk_64.o if !CONFIG_X86_32.

Signed-off-by: Oleg Nesterov 
Acked-by: Andy Lutomirski 
Cc: Denys Vlasenko 
Cc: Peter Zijlstra 
Cc: Linus Torvalds 
Link: http://lkml.kernel.org/r/20140921184232.GB23727@redhat.com
Signed-off-by: Ingo Molnar

locking/rwlock, x86: Delete unused asm/rwlock.h and rwlock.S

2014-09-10T09:46:39+00:00

This patch removes the unused asm/rwlock.h and rwlock.S files.

Signed-off-by: Waiman Long 
Signed-off-by: Peter Zijlstra (Intel) 
Link: http://lkml.kernel.org/r/1408037251-45918-3-git-send-email-Waiman.Long@hp.com
Cc: Scott J Norton 
Cc: Borislav Petkov 
Cc: Daniel Borkmann 
Cc: David S. Miller 
Cc: Francesco Fusco 
Cc: Linus Torvalds 
Cc: Thomas Graf 
Signed-off-by: Ingo Molnar

x86, boot: Carve out early cmdline parsing function

2014-05-21T03:21:24+00:00

Carve out early cmdline parsing function into .../lib/cmdline.c so it
can be used by early code in the kernel proper as well.

Adapted from arch/x86/boot/cmdline.c.

Signed-off-by: Borislav Petkov 
Link: http://lkml.kernel.org/r/1400525957-11525-2-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin

lib: introduce arch optimized hash library

2013-12-17T19:27:17+00:00

We introduce a new hashing library that is meant to be used in
the contexts where speed is more important than uniformity of the
hashed values. The hash library leverages architecture specific
implementation to achieve high performance and fall backs to
jhash() for the generic case.

On Intel-based x86 architectures, the library can exploit the crc32l
instruction, part of the Intel SSE4.2 instruction set, if the
instruction is supported by the processor. This implementation
is twice as fast as the jhash() implementation on an i7 processor.

Additional architectures, such as Arm64 provide instructions for
accelerating the computation of CRC, so they could be added as well
in follow-up work.

Signed-off-by: Francesco Fusco 
Signed-off-by: Daniel Borkmann 
Signed-off-by: Thomas Graf 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: David S. Miller

x86: Improve the printout of the SMP bootup CPU table

2013-09-28T08:10:26+00:00

As the new x86 CPU bootup printout format code maintainer, I am
taking immediate action to improve and clean (and thus indulge
my OCD) the reporting of the cores when coming up online.

Fix padding to a right-hand alignment, cleanup code and bind
reporting width to the max number of supported CPUs on the
system, like this:

 [    0.074509] smpboot: Booting Node   0, Processors:      #1  #2  #3  #4  #5  #6  #7 OK
 [    0.644008] smpboot: Booting Node   1, Processors:  #8  #9 #10 #11 #12 #13 #14 #15 OK
 [    1.245006] smpboot: Booting Node   2, Processors: #16 #17 #18 #19 #20 #21 #22 #23 OK
 [    1.864005] smpboot: Booting Node   3, Processors: #24 #25 #26 #27 #28 #29 #30 #31 OK
 [    2.489005] smpboot: Booting Node   4, Processors: #32 #33 #34 #35 #36 #37 #38 #39 OK
 [    3.093005] smpboot: Booting Node   5, Processors: #40 #41 #42 #43 #44 #45 #46 #47 OK
 [    3.698005] smpboot: Booting Node   6, Processors: #48 #49 #50 #51 #52 #53 #54 #55 OK
 [    4.304005] smpboot: Booting Node   7, Processors: #56 #57 #58 #59 #60 #61 #62 #63 OK
 [    4.961413] Brought up 64 CPUs

and this:

 [    0.072367] smpboot: Booting Node   0, Processors:    #1 #2 #3 #4 #5 #6 #7 OK
 [    0.686329] Brought up 8 CPUs

Signed-off-by: Borislav Petkov 
Cc: Libin 
Cc: wangyijing@huawei.com
Cc: fenghua.yu@intel.com
Cc: guohanjun@huawei.com
Cc: paul.gortmaker@windriver.com
Link: http://lkml.kernel.org/r/20130927143554.GF4422@pd.tnic
Signed-off-by: Ingo Molnar

x86, 386 removal: Remove CONFIG_CMPXCHG

2012-11-29T21:23:01+00:00

All 486+ CPUs support CMPXCHG, so remove the fallback 386 support
code.

Signed-off-by: H. Peter Anvin 
Link: http://lkml.kernel.org/r/1354132230-21854-3-git-send-email-hpa@linux.intel.com