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    SubjectRe: [PATCH 1/10] sysfs: fix kmem_cache_free(NULL)
    2007/7/17, Greg KH <gregkh@suse.de>:
    > > Why not just allow kmem_cache_free() to allow NULL like other functions
    > > in the kernel?

    On Tue, 17 Jul 2007, Akinobu Mita wrote:
    > It seems there was discussion about this and no conclusion
    > yet?

    IIRC the patch was rejected by relevant maintainers because it slows
    down kmem_cache_free() which is presumably bad for some hot-paths...

    Pekka
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