slab: document kzfree() zeroing behavior
As suggested by Alan Cox, document the fact that kzfree() can zero out a great deal more memory than the what the user requested from kmalloc(). Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
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@ -166,6 +166,10 @@ EXPORT_SYMBOL(krealloc);
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*
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*
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* The memory of the object @p points to is zeroed before freed.
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* The memory of the object @p points to is zeroed before freed.
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* If @p is %NULL, kzfree() does nothing.
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* If @p is %NULL, kzfree() does nothing.
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*
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* Note: this function zeroes the whole allocated buffer which can be a good
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* deal bigger than the requested buffer size passed to kmalloc(). So be
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* careful when using this function in performance sensitive code.
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*/
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*/
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void kzfree(const void *p)
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void kzfree(const void *p)
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{
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{
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