mempool/octeontx: fix natural alignment being optimized out

The mbox messages are naturally aligned and in some cases compiler
optimization might disregard natural alignment.
Use volatile key word to force compiler to disable optimizing and
maintain alignment.

Fixes: aecb8e093b52 ("event/octeontx: introduce specialized mbox message copy")
Cc: stable@dpdk.org
Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Acked-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>

diff --git a/drivers/mempool/octeontx/octeontx_mbox.c b/drivers/mempool/octeontx/octeontx_mbox.c
index 28d8c8b..f8cb6a4 100644 (file)
--- a/drivers/mempool/octeontx/octeontx_mbox.c
+++ b/drivers/mempool/octeontx/octeontx_mbox.c
@@ -61,7 +61,7 @@ struct mbox_ram_hdr {
 };
 
 static inline void
-mbox_msgcpy(uint8_t *d, const uint8_t *s, uint16_t size)
+mbox_msgcpy(volatile uint8_t *d, volatile const uint8_t *s, uint16_t size)
 {
        uint16_t i;