[dpdk-dev] [PATCH 1/1] arm: set CONFIG_RTE_ARCH_STRICT_ALIGN=y for armv7 target
Jan Viktorin
viktorin at rehivetech.com
Wed Dec 9 16:16:17 CET 2015
This patch reduces number of warnings from 53 to 40. It removes the usual false
positives utilizing unaligned_uint*_t data types.
Signed-off-by: Jan Viktorin <viktorin at rehivetech.com>
---
As far as I know, only a 64-bit unaligned access can be a problem for ARMv7.
I found only one such occurence:
118 struct rte_mbuf *
119 rte_ipv4_frag_reassemble_packet(struct rte_ip_frag_tbl *tbl,
120 struct rte_ip_frag_death_row *dr, struct rte_mbuf *mb, uint64_t tms,
121 struct ipv4_hdr *ip_hdr)
...
133 psd = (unaligned_uint64_t *)&ip_hdr->src_addr;
134 /* use first 8 bytes only */
135 key.src_dst[0] = psd[0];
136 key.id = ip_hdr->packet_id;
137 key.key_len = IPV4_KEYLEN
Is this a real issue?
---
config/defconfig_arm-armv7a-linuxapp-gcc | 1 +
1 file changed, 1 insertion(+)
diff --git a/config/defconfig_arm-armv7a-linuxapp-gcc b/config/defconfig_arm-armv7a-linuxapp-gcc
index cbebd64..2482d91 100644
--- a/config/defconfig_arm-armv7a-linuxapp-gcc
+++ b/config/defconfig_arm-armv7a-linuxapp-gcc
@@ -39,6 +39,7 @@ CONFIG_RTE_ARCH_ARM_TUNE="cortex-a9"
CONFIG_RTE_ARCH_ARM_NEON=y
CONFIG_RTE_FORCE_INTRINSICS=y
+CONFIG_RTE_ARCH_STRICT_ALIGN=y
CONFIG_RTE_TOOLCHAIN="gcc"
CONFIG_RTE_TOOLCHAIN_GCC=y
--
2.6.3
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