[PATCH 1/7] msgb: Add may_alias attribute to struct libgb_msgb_cb

This explicitely allows aliasing of this struct to avoid the warning shown below. Note, that this warning isn't show when '-fno-strict-aliasing' is used. Addresses: gb/gprs_ns_test.c:85:54: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] --- include/osmocom/gprs/gprs_msgb.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/osmocom/gprs/gprs_msgb.h b/include/osmocom/gprs/gprs_msgb.h index f4c8554..e277696 100644 --- a/include/osmocom/gprs/gprs_msgb.h +++ b/include/osmocom/gprs/gprs_msgb.h @@ -16,7 +16,7 @@ struct libgb_msgb_cb { /* Identifier of a MS (inside BTS), equal to 'struct sgsn_mm_ctx' */ uint32_t tlli; -} __attribute__((packed)); +} __attribute__((packed, may_alias)); #define LIBGB_MSGB_CB(__msgb) ((struct libgb_msgb_cb *)&((__msgb)->cb[0])) #define msgb_tlli(__x) LIBGB_MSGB_CB(__x)->tlli #define msgb_nsei(__x) LIBGB_MSGB_CB(__x)->nsei -- 1.7.9.5