Re: [PATCH 1/2] powerpc: Allow flush_icache_range to work across ranges >4GB

On Fri, 2019-08-09 at 10:59 +0200, Christophe Leroy wrote:

Le 09/08/2019 à 02:45, Alastair D'Silva a écrit :

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From: Alastair D'Silva alastair@d-silva.org

When calling flush_icache_range with a size >4GB, we were masking off the upper 32 bits, so we would incorrectly flush a range smaller than intended.

This patch replaces the 32 bit shifts with 64 bit ones, so that the full size is accounted for.

Heads-up for backporters: the old version of flush_dcache_range is subject to a similar bug (this has since been replaced with a C implementation).

Can you submit a patch to stable, explaining this ?

This patch was sent to stable too - or did you mean send another patch for the stable asm version of flush_dcache_range?