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    Subject[PATCH] slab: add missing guard for kernel_map_pages() use

    All other uses of kernel_map_pages() are explicitly excluded without
    CONFIG_DEBUG_PAGEALLOC, this one should be too.

    Signed-off-by: Ron Lee <ron@debian.org>


    diff --git a/mm/slab.c b/mm/slab.c
    index 9a90b00..b5e5b27 100644
    --- a/mm/slab.c
    +++ b/mm/slab.c
    @@ -2674,10 +2683,12 @@ static void cache_init_objs(struct kmem_cache *cachep,
    slab_error(cachep, "constructor overwrote the"
    " start of an object");
    }
    +#ifdef CONFIG_DEBUG_PAGEALLOC
    if ((cachep->buffer_size % PAGE_SIZE) == 0 &&
    OFF_SLAB(cachep) && cachep->flags & SLAB_POISON)
    kernel_map_pages(virt_to_page(objp),
    cachep->buffer_size / PAGE_SIZE, 0);
    +#endif
    #else
    if (cachep->ctor)
    cachep->ctor(objp);



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