linux-stable.git/arch/powerpc/lib/Makefile, branch linux-4.7.y

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next

2016-03-14T09:05:14+00:00

Freescale updates from Scott:

"Highlights include 8xx optimizations, 32-bit checksum optimizations,
86xx consolidation, e5500/e6500 cpu hotplug, more fman and other dt
bits, and minor fixes/cleanup."

powerpc/ftrace: Use $(CC_FLAGS_FTRACE) when disabling ftrace

2016-03-07T03:53:55+00:00

Rather than open-coding -pg whereever we want to disable ftrace, use the
existing $(CC_FLAGS_FTRACE) variable.

This has the advantage that it will work in future when we use a
different set of flags to enable ftrace.

Signed-off-by: Torsten Duwe 
Signed-off-by: Michael Ellerman

powerpc32: checksum_wrappers_64 becomes checksum_wrappers

2016-03-05T03:47:47+00:00

The powerpc64 checksum wrapper functions adds csum_and_copy_to_user()
which otherwise is implemented in include/net/checksum.h by using
csum_partial() then copy_to_user()

Those two wrapper fonctions are also applicable to powerpc32 as it is
based on the use of csum_partial_copy_generic() which also
exists on powerpc32

This patch renames arch/powerpc/lib/checksum_wrappers_64.c to
arch/powerpc/lib/checksum_wrappers.c and
makes it non-conditional to CONFIG_WORD_SIZE

Signed-off-by: Christophe Leroy 
Signed-off-by: Scott Wood

powerpc: Only use -mabi=altivec if toolchain supports it

2015-06-11T07:33:05+00:00

The -mabi=altivec option is not recognised on LLVM, so use call cc-option
to check for support.

Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman

powerpc/lib: Makefile, use obj64-y to consolidate 64-bit rules

2015-01-28T04:00:24+00:00

Signed-off-by: Michael Ellerman

powerpc/lib: Makefile, consolidate obj-y sections

2015-01-28T04:00:24+00:00

Signed-off-by: Michael Ellerman

powerpc: Add 64bit optimised memcmp

2015-01-23T03:02:55+00:00

I noticed ksm spending quite a lot of time in memcmp on a large
KVM box. The current memcmp loop is very unoptimised - byte at a
time compares with no loop unrolling. We can do much much better.

Optimise the loop in a few ways:

- Unroll the byte at a time loop

- For large (at least 32 byte) comparisons that are also 8 byte
  aligned, use an unrolled modulo scheduled loop using 8 byte
  loads. This is similar to our glibc memcmp.

A simple microbenchmark testing 10000000 iterations of an 8192 byte
memcmp was used to measure the performance:

baseline:	29.93 s

modified:	 1.70 s

Just over 17x faster.

v2: Incorporated some suggestions from Segher:

- Use andi. instead of rdlicl.

- Convert bdnzt eq, to bdnz. It's just duplicating the earlier compare
  and was a relic from a previous version.

- Don't use cr5, we have plans to use that CR field for fast local
  atomics.

Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman

powerpc/lib: Do not include string.o in obj-y twice

2014-12-29T04:45:55+00:00

In the Makefile, string.o (which is generated from string.S) is
included into the list of objects being built unconditionally
(obj-y) in line 12.

Additionally, if CONFIG_PPC64 is set, it is included again in
line 17.

This patch removes the latter unnecessary inclusion.

Signed-off-by: Andreas Ruprecht 
Signed-off-by: Michael Ellerman

powerpc: Remove unused devm_ioremap_prot()

2014-11-09T22:59:28+00:00

Added in 2008, but has never had any in-tree users, and no other
architectures provide it.

Signed-off-by: Kyle McMartin 
Signed-off-by: Michael Ellerman

powerpc: Move lib symbol exports into arch/powerpc/lib/ppc_ksyms.c

2014-09-25T13:14:39+00:00

Move the lib symbol exports closer to their function definitions

Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman