[linux-yocto] [PATCH linux-yocto-4.4 00/14] Add Link Time Optimization

Bruce Ashfield bruce.ashfield at windriver.com
Tue Feb 14 13:03:59 PST 2017


On 2017-02-13 3:41 PM, Alejandro Hernandez wrote:
> These set of patches enable Link Time Optimization (LTO), they are meant specifically
> for linux-yocto-4.4, another set (rebased) will be sent for linux-yocto-4.8 and
> linux-yocto-4.9 respectively, these also complement the series sent to yocto-kernel-cache
> a few weeks ago.

The changes look fine to me, but in order to properly track them
against upstream, I'd like to add a bit more logging to the commit
headers.

I assume these were posted to lkml (I haven't gone to look yet),
and if they were posted, can we add a lkml archive link to the
headers ?

That allows me to track the progress and update/drop them as appropriate.

Bruce

>
> Andi Kleen (14):
>   Kbuild, lto: Set TMPDIR for LTO v4
>   lto: Add __noreorder and mark initcalls __noreorder
>   Kbuild, lto: Add Link Time Optimization support
>   lto: Disable LTO for hweight functions
>   Don't inline __const_udelay
>   Mark spinlocks noinline when inline spinlocks are disabled
>   Kbuild, bloat-o-meter: Ignore .lto_priv postfix
>   Don't let LATENCYTOP and LOCKDEP select KALLSYMS_ALL
>   lto, workaround: Disable LTO for BPF
>   x86, perf: Fix __initconst declaration in rapl perf driver
>   x86, workaround: Disable mm init BUILD_BUG_ON for LTO
>   work around linker map issue
>   sched: Move sched_to_prio arrays out of line
>   fixup! Kbuild, lto: Add Link Time Optimization support
>
>  Documentation/lto-build                     | 173 ++++++++++++++++++++++++++++
>  Makefile                                    |  19 ++-
>  arch/x86/Kconfig                            |   2 +-
>  arch/x86/kernel/cpu/perf_event_intel_rapl.c |   2 +-
>  arch/x86/kernel/vmlinux.lds.S               |   2 +
>  arch/x86/lib/delay.c                        |   2 +-
>  arch/x86/mm/init_32.c                       |   2 +
>  include/linux/compiler-gcc.h                |   5 +
>  include/linux/compiler.h                    |   4 +
>  include/linux/init.h                        |   2 +-
>  init/Kconfig                                |  73 ++++++++++++
>  kernel/bpf/Makefile                         |   5 +
>  kernel/gcov/Kconfig                         |   2 +-
>  kernel/locking/spinlock.c                   |  56 ++++-----
>  kernel/sched/auto_group.c                   |   2 +-
>  kernel/sched/core.c                         |  45 +++++++-
>  kernel/sched/sched.h                        |  42 +------
>  lib/Kconfig.debug                           |   3 +-
>  lib/Makefile                                |   4 +-
>  scripts/Makefile.lto                        |  94 +++++++++++++++
>  scripts/Makefile.modpost                    |   7 +-
>  scripts/bloat-o-meter                       |   1 +
>  scripts/gcc-ld                              |   2 +-
>  scripts/link-vmlinux.sh                     |   2 +-
>  24 files changed, 466 insertions(+), 85 deletions(-)
>  create mode 100644 Documentation/lto-build
>  create mode 100644 scripts/Makefile.lto
>



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