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    Subject[PATCH] memory-failure: fix section mismatch
    Date
    Clang complains when a variable is declared extern twice, but with two
    different sections. num_poisoned_pages is marked extern and __read_mostly
    in include/linux/swapops.h, but only extern in include/linux/mm.h. Some
    c source files must include both, and thus see the conflicting
    declarations.

    Signed-off-by: Nick Desaulniers <nick.desaulniers@gmail.com>
    ---
    include/linux/mm.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/include/linux/mm.h b/include/linux/mm.h
    index ad06d42adb1a..bd4bd59f02c1 100644
    --- a/include/linux/mm.h
    +++ b/include/linux/mm.h
    @@ -2582,7 +2582,7 @@ extern int get_hwpoison_page(struct page *page);
    extern int sysctl_memory_failure_early_kill;
    extern int sysctl_memory_failure_recovery;
    extern void shake_page(struct page *p, int access);
    -extern atomic_long_t num_poisoned_pages;
    +extern atomic_long_t num_poisoned_pages __read_mostly;
    extern int soft_offline_page(struct page *page, int flags);


    --
    2.14.1
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