From 229fc129be85a4d2d2c4efddae7bb97c3d87d416 Mon Sep 17 00:00:00 2001 From: Khem Raj Date: Mon, 13 Mar 2023 22:02:01 -0700 Subject: [PATCH] examples: fix Arm build with GCC 12 GCC-12 warns when a pointer of type union points to an array of same defined size, as union internally gets paded with pad bytes. ../examples/common/neon/port_group.h:42:21: error: array subscript 'union [0]' is partly outside array bounds of 'uint16_t[5]' {aka 'short unsigned int[5]'} [-Werror=array-bounds] 42 | pnum->u64 = gptbl[v].pnum; | ^~ ../examples/common/neon/port_group.h:21:23: note: object 'pn' of size [0, 10] 21 | port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, uint16x8_t dp1 | ~~~~~~~~~^~~~~~~~~~~~~~~ ../examples/common/neon/port_group.h:43:21: error: array subscript 'union [0]' is partly outside array bounds of 'uint16_t[5]' {aka 'short unsigned int[5]'} [-Werror=array-bounds] 43 | pnum->u16[FWDSTEP] = 1; | ^~ Fixes: 732115ce38c6 ("examples/l3fwd: move packet group function in common") Upstream-Status: Backport [https://github.com/DPDK/dpdk/commit/b269bd630e96b276a69d698e13ad9ebfbbb67512] Signed-off-by: Amit Prakash Shukla Signed-off-by: Khem Raj --- examples/l3fwd/l3fwd_neon.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/examples/l3fwd/l3fwd_neon.h b/examples/l3fwd/l3fwd_neon.h index 86ac5971d7..dc73e9fef7 100644 --- a/examples/l3fwd/l3fwd_neon.h +++ b/examples/l3fwd/l3fwd_neon.h @@ -77,7 +77,7 @@ port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, uint16x8_t dp1, union { uint16_t u16[FWDSTEP + 1]; uint64_t u64; - } *pnum = (void *)pn; + } __rte_packed *pnum = (void *)pn; int32_t v; uint16x8_t mask = {1, 2, 4, 8, 0, 0, 0, 0}; -- 2.39.2