[v4,32/39] bpf: use C11 alignas

Message ID 1707928564-28796-33-git-send-email-roretzla@linux.microsoft.com (mailing list archive)
State Superseded, archived
Delegated to: David Marchand
Series use C11 alignas and normalize type alignment |


Context Check Description
ci/checkpatch success coding style OK

Commit Message

Tyler Retzlaff Feb. 14, 2024, 4:35 p.m. UTC
  * Move __rte_aligned from the end of {struct,union} definitions to
  be between {struct,union} and tag.

  The placement between {struct,union} and the tag allows the desired
  alignment to be imparted on the type regardless of the toolchain being
  used for all of GCC, LLVM, MSVC compilers building both C and C++.

* Replace use of __rte_aligned(a) on variables/fields with alignas(a).

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
 lib/bpf/bpf_pkt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)


diff --git a/lib/bpf/bpf_pkt.c b/lib/bpf/bpf_pkt.c
index 793a75d..aaca935 100644
--- a/lib/bpf/bpf_pkt.c
+++ b/lib/bpf/bpf_pkt.c
@@ -23,7 +23,7 @@ 
  * information about installed BPF rx/tx callback
-struct bpf_eth_cbi {
+struct __rte_cache_aligned bpf_eth_cbi {
 	/* used by both data & control path */
 	RTE_ATOMIC(uint32_t) use;    /*usage counter */
 	const struct rte_eth_rxtx_callback *cb;  /* callback handle */
@@ -33,7 +33,7 @@  struct bpf_eth_cbi {
 	LIST_ENTRY(bpf_eth_cbi) link;
 	uint16_t port;
 	uint16_t queue;
-} __rte_cache_aligned;
  * Odd number means that callback is used by datapath.