On 11/6/2017 12:18 AM, Jianbo Liu wrote: > The 11/06/2017 09:59, Jerin Jacob wrote: >> -----Original Message----- >>> Date: Fri, 3 Nov 2017 16:13:51 +0530 >>> From: Guduri Prathyusha <[email protected]> >>> To: [email protected] >>> CC: [email protected], [email protected], >>> [email protected], [email protected], Guduri Prathyusha >>> <[email protected]> >>> Subject: [dpdk-dev] [PATCH v2] examples/l3fwd: fix aliasing in port grouping >>> X-Mailer: git-send-email 2.14.1 >>> >>> With -f-strict-aliasing enabled by default from -O2, gcc > 5.x gives >>> undefined behavior in port_groupx4 in ARM. 'pn' and 'pnum' are >>> two different pointers pointing to same chunk of memory and >>> with -f-strict-aliasing the pointers are assumed to be pointing to >>> different memory and compiler reorders instructions that depend on >>> pnum and pn. This breaks port grouping algorithm. >>> >>> This patch eliminates the above problem by introducing a compiler >>> barrier between the instructions that depend on pnum, pn and lp. >>> >>> Fixes: 569b290cdb36 ("examples/l3fwd: add NEON implementation") >>> >>> Signed-off-by: Guduri Prathyusha <[email protected]> >> >> Acked-by: Jerin Jacob <[email protected]> > > Acked-by: Jianbo Liu <[email protected]>
Applied to dpdk/master, thanks.
