Re: [PATCH v2] ARM: net fix emit_udiv() for BPF_ALU | BPF_DIV | BPF_K intruction.

From: David Miller
Date: Sat May 09 2015 - 17:41:03 EST

From: Nicolas Schichan <nschichan@xxxxxxxxxx>
Date: Wed, 6 May 2015 18:31:56 +0200

> In that case, emit_udiv() will be called with rn == ARM_R0 (r_scratch)
> and loading rm first into ARM_R0 will result in jit_udiv() function
> being called the same dividend and divisor. Fix that by loading rn
> first into ARM_R1 and then rm into ARM_R0.
> Signed-off-by: Nicolas Schichan <nschichan@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # v3.13+
> Fixes: aee636c4809f (bpf: do not use reciprocal divide)

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