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    Subject[PATCH v2 3/5] kbuild/extable: Hook up sortextable into the build system.
    Date
    From: David Daney <david.daney@cavium.com>

    Define a config variable BUILDTIME_EXTABLE_SORT to control build time
    sorting of the kernel's exception table.

    Patch Makefile to do the sorting when BUILDTIME_EXTABLE_SORT is
    selected.

    Signed-off-by: David Daney <david.daney@cavium.com>
    ---
    Makefile | 10 ++++++++++
    init/Kconfig | 3 +++
    2 files changed, 13 insertions(+), 0 deletions(-)

    diff --git a/Makefile b/Makefile
    index ae947cc..e3bbca9 100644
    --- a/Makefile
    +++ b/Makefile
    @@ -784,6 +784,10 @@ quiet_cmd_vmlinux_version = GEN .version
    quiet_cmd_sysmap = SYSMAP
    cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap

    +# Sort exception table at build time
    +quiet_cmd_sortextable = SORTEX
    + cmd_sortextable = $(objtree)/scripts/sortextable
    +
    # Link of vmlinux
    # If CONFIG_KALLSYMS is set .version is already updated
    # Generate System.map and verify that the content is consistent
    @@ -796,6 +800,12 @@ define rule_vmlinux__
    $(call cmd,vmlinux__)
    $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd

    + $(if $(CONFIG_BUILDTIME_EXTABLE_SORT), \
    + $(Q)$(if $($(quiet)cmd_sortextable), \
    + echo ' $($(quiet)cmd_sortextable) vmlinux' &&) \
    + $(cmd_sortextable) vmlinux)
    +
    +
    $(Q)$(if $($(quiet)cmd_sysmap), \
    echo ' $($(quiet)cmd_sysmap) System.map' &&) \
    $(cmd_sysmap) $@ System.map; \
    diff --git a/init/Kconfig b/init/Kconfig
    index 6cfd71d..92a1296 100644
    --- a/init/Kconfig
    +++ b/init/Kconfig
    @@ -27,6 +27,9 @@ config IRQ_WORK
    bool
    depends on HAVE_IRQ_WORK

    +config BUILDTIME_EXTABLE_SORT
    + bool
    +
    menu "General setup"

    config EXPERIMENTAL
    --
    1.7.2.3


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