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    Subject[PATCH RFC 2/5] extable: Skip sorting if sorted at build time.
    Date
    From: David Daney <david.daney@cavium.com>

    If the build program sortextable has already sorted the exception
    table, don't sort it again.

    Signed-off-by: David Daney <david.daney@cavium.com>
    ---
    kernel/extable.c | 8 +++++++-
    1 files changed, 7 insertions(+), 1 deletions(-)

    diff --git a/kernel/extable.c b/kernel/extable.c
    index 5339705..fe35a63 100644
    --- a/kernel/extable.c
    +++ b/kernel/extable.c
    @@ -35,10 +35,16 @@ DEFINE_MUTEX(text_mutex);
    extern struct exception_table_entry __start___ex_table[];
    extern struct exception_table_entry __stop___ex_table[];

    +/* Cleared by build time tools if the table is already sorted. */
    +u32 __initdata main_extable_sort_needed = 1;
    +
    /* Sort the kernel's built-in exception table */
    void __init sort_main_extable(void)
    {
    - sort_extable(__start___ex_table, __stop___ex_table);
    + if (main_extable_sort_needed)
    + sort_extable(__start___ex_table, __stop___ex_table);
    + else
    + pr_notice("__ex_table already sorted, skipping sort\n");
    }

    /* Given an address, look for it in the exception tables. */
    --
    1.7.2.3


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