Re: [PATCH] Uninline kcalloc()

From: Christoph Lameter
Date: Tue Sep 25 2007 - 17:21:43 EST

On Mon, 24 Sep 2007, Valdis.Kletnieks@xxxxxx wrote:

> I think I looked at that, and it wasn't as easy as it looked, because there
> were ugly corner cases for what __builtin_return_address() returned depending
> on exactly what did or didn't get inlined. Basically, it's ugly stuff - if you
> try to use __builtin_retur_address inside kcalloc to pass to __kmalloc, and
> then kcalloc gets inlined, you end up passing not the routine you wanted (the
> caller of kcalloc), but the *parent* of that...

Note that this can be done in a clean way in SLUB using slab_alloc() which
takes a address parameter as obtained from __builtin_return_address().

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