[REGRESSION][PATCH V5 3/3] bpf jit: Let the powerpc jit handle negative offsets

[David Miller]

From: Jan Seiffert <kaffeemonster at googlemail.com>
Date: Mon, 30 Apr 2012 07:02:19 +0200

> Now the helper function from filter.c for negative offsets is exported,
> it can be used it in the jit to handle negative offsets.
> 
> First modify the asm load helper functions to handle:
> - know positive offsets
> - know negative offsets
> - any offset
> 
> then the compiler can be modified to explicitly use these helper
> when appropriate.
> 
> This fixes the case of a negative X register and allows to lift
> the restriction that bpf programs with negative offsets can't
> be jited.
> 
> Tested-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Signed-off-by: Jan Seiffert <kaffeemonster at googlemail.com>

Applied, thanks.