diff --git a/lib/eal/arm/include/rte_vect.h b/lib/eal/arm/include/rte_vect.h
index 8cfe4bd..c7a3b2e 100644
--- a/lib/eal/arm/include/rte_vect.h
+++ b/lib/eal/arm/include/rte_vect.h
@@ -5,6 +5,7 @@
 #ifndef _RTE_VECT_ARM_H_
 #define _RTE_VECT_ARM_H_
 
+#include <stdalign.h>
 #include <stdint.h>
 #include "generic/rte_vect.h"
 #include "rte_debug.h"
@@ -25,13 +26,14 @@
 #define	XMM_MASK	(XMM_SIZE - 1)
 
 typedef union rte_xmm {
+	alignas(16)
 	xmm_t    x;
 	uint8_t  u8[XMM_SIZE / sizeof(uint8_t)];
 	uint16_t u16[XMM_SIZE / sizeof(uint16_t)];
 	uint32_t u32[XMM_SIZE / sizeof(uint32_t)];
 	uint64_t u64[XMM_SIZE / sizeof(uint64_t)];
 	double   pd[XMM_SIZE / sizeof(double)];
-} __rte_aligned(16) rte_xmm_t;
+} rte_xmm_t;
 
 #if defined(RTE_ARCH_ARM) && defined(RTE_ARCH_32)
 /* NEON intrinsic vqtbl1q_u8() is not supported in ARMv7-A(AArch32) */
diff --git a/lib/eal/common/malloc_elem.h b/lib/eal/common/malloc_elem.h
index 952ce73..c2c336e 100644
--- a/lib/eal/common/malloc_elem.h
+++ b/lib/eal/common/malloc_elem.h
@@ -5,6 +5,7 @@
 #ifndef MALLOC_ELEM_H_
 #define MALLOC_ELEM_H_
 
+#include <stdalign.h>
 #include <stdbool.h>
 
 #include <rte_common.h>
@@ -21,6 +22,7 @@ enum elem_state {
 };
 
 struct malloc_elem {
+	alignas(RTE_CACHE_LINE_SIZE)
 	struct malloc_heap *heap;
 	struct malloc_elem *volatile prev;
 	/**< points to prev elem in memseg */
@@ -48,7 +50,7 @@ struct malloc_elem {
 	size_t user_size;
 	uint64_t asan_cookie[2]; /* must be next to header_cookie */
 #endif
-} __rte_cache_aligned;
+};
 
 static const unsigned int MALLOC_ELEM_HEADER_LEN = sizeof(struct malloc_elem);
 
diff --git a/lib/eal/common/malloc_heap.h b/lib/eal/common/malloc_heap.h
index 8f3ab57..a724bfb 100644
--- a/lib/eal/common/malloc_heap.h
+++ b/lib/eal/common/malloc_heap.h
@@ -5,6 +5,7 @@
 #ifndef MALLOC_HEAP_H_
 #define MALLOC_HEAP_H_
 
+#include <stdalign.h>
 #include <stdbool.h>
 #include <sys/queue.h>
 
@@ -22,6 +23,7 @@
  * Structure to hold malloc heap
  */
 struct malloc_heap {
+	alignas(RTE_CACHE_LINE_SIZE)
 	rte_spinlock_t lock;
 	LIST_HEAD(, malloc_elem) free_head[RTE_HEAP_NUM_FREELISTS];
 	struct malloc_elem *volatile first;
@@ -31,7 +33,7 @@ struct malloc_heap {
 	unsigned int socket_id;
 	size_t total_size;
 	char name[RTE_HEAP_NAME_MAX_LEN];
-} __rte_cache_aligned;
+};
 
 void *
 malloc_heap_alloc(const char *type, size_t size, int socket, unsigned int flags,
diff --git a/lib/eal/common/rte_keepalive.c b/lib/eal/common/rte_keepalive.c
index e0494b2..67a898d 100644
--- a/lib/eal/common/rte_keepalive.c
+++ b/lib/eal/common/rte_keepalive.c
@@ -3,6 +3,7 @@
  */
 
 #include <inttypes.h>
+#include <stdalign.h>
 
 #include <rte_common.h>
 #include <rte_cycles.h>
@@ -17,7 +18,8 @@ struct rte_keepalive {
 		/*
 		 * Each element must be cache aligned to prevent false sharing.
 		 */
-		enum rte_keepalive_state core_state __rte_cache_aligned;
+		alignas(RTE_CACHE_LINE_SIZE)
+		enum rte_keepalive_state core_state;
 	} live_data[RTE_KEEPALIVE_MAXCORES];
 
 	/** Last-seen-alive timestamps */
diff --git a/lib/eal/common/rte_random.c b/lib/eal/common/rte_random.c
index 7709b8f..c04917e 100644
--- a/lib/eal/common/rte_random.c
+++ b/lib/eal/common/rte_random.c
@@ -2,6 +2,8 @@
  * Copyright(c) 2019 Ericsson AB
  */
 
+#include <stdalign.h>
+
 #ifdef __RDSEED__
 #include <x86intrin.h>
 #endif
@@ -14,13 +16,14 @@
 #include <rte_random.h>
 
 struct rte_rand_state {
+	alignas(RTE_CACHE_LINE_SIZE)
 	uint64_t z1;
 	uint64_t z2;
 	uint64_t z3;
 	uint64_t z4;
 	uint64_t z5;
 	RTE_CACHE_GUARD;
-} __rte_cache_aligned;
+};
 
 /* One instance each for every lcore id-equipped thread, and one
  * additional instance to be shared by all others threads (i.e., all
diff --git a/lib/eal/common/rte_service.c b/lib/eal/common/rte_service.c
index e183d2e..861ae31 100644
--- a/lib/eal/common/rte_service.c
+++ b/lib/eal/common/rte_service.c
@@ -2,6 +2,7 @@
  * Copyright(c) 2017 Intel Corporation
  */
 
+#include <stdalign.h>
 #include <stdio.h>
 #include <inttypes.h>
 #include <string.h>
@@ -33,6 +34,7 @@
 
 /* internal representation of a service */
 struct rte_service_spec_impl {
+	alignas(RTE_CACHE_LINE_SIZE)
 	/* public part of the struct */
 	struct rte_service_spec spec;
 
@@ -53,7 +55,7 @@ struct rte_service_spec_impl {
 	 * on currently.
 	 */
 	RTE_ATOMIC(uint32_t) num_mapped_cores;
-} __rte_cache_aligned;
+};
 
 struct service_stats {
 	RTE_ATOMIC(uint64_t) calls;
@@ -62,6 +64,7 @@ struct service_stats {
 
 /* the internal values of a service core */
 struct core_state {
+	alignas(RTE_CACHE_LINE_SIZE)
 	/* map of services IDs are run on this core */
 	uint64_t service_mask;
 	RTE_ATOMIC(uint8_t) runstate; /* running or stopped */
@@ -71,7 +74,7 @@ struct core_state {
 	RTE_ATOMIC(uint64_t) loops;
 	RTE_ATOMIC(uint64_t) cycles;
 	struct service_stats service_stats[RTE_SERVICE_NUM_MAX];
-} __rte_cache_aligned;
+};
 
 static uint32_t rte_service_count;
 static struct rte_service_spec_impl *rte_services;
diff --git a/lib/eal/include/generic/rte_atomic.h b/lib/eal/include/generic/rte_atomic.h
index 0e639da..bc9213c 100644
--- a/lib/eal/include/generic/rte_atomic.h
+++ b/lib/eal/include/generic/rte_atomic.h
@@ -12,6 +12,7 @@
  * This file defines a generic API for atomic operations.
  */
 
+#include <stdalign.h>
 #include <stdint.h>
 
 #include <rte_common.h>
@@ -1096,6 +1097,7 @@ static inline void rte_atomic64_clear(rte_atomic64_t *v)
  */
 typedef struct {
 	union {
+		alignas(16)
 		uint64_t val[2];
 #ifdef RTE_ARCH_64
 #ifndef RTE_TOOLCHAIN_MSVC
@@ -1103,7 +1105,7 @@ static inline void rte_atomic64_clear(rte_atomic64_t *v)
 #endif
 #endif
 	};
-} __rte_aligned(16) rte_int128_t;
+} rte_int128_t;
 
 #ifdef __DOXYGEN__
 
diff --git a/lib/eal/loongarch/include/rte_vect.h b/lib/eal/loongarch/include/rte_vect.h
index 1546515..856d87b 100644
--- a/lib/eal/loongarch/include/rte_vect.h
+++ b/lib/eal/loongarch/include/rte_vect.h
@@ -5,6 +5,7 @@
 #ifndef RTE_VECT_LOONGARCH_H
 #define RTE_VECT_LOONGARCH_H
 
+#include <stdalign.h>
 #include <stdint.h>
 #include "generic/rte_vect.h"
 #include "rte_common.h"
@@ -16,6 +17,7 @@
 #define RTE_VECT_DEFAULT_SIMD_BITWIDTH RTE_VECT_SIMD_DISABLED
 
 typedef union xmm {
+	alignas(16)
 	int8_t   i8[16];
 	int16_t  i16[8];
 	int32_t  i32[4];
@@ -25,19 +27,20 @@
 	uint32_t u32[4];
 	uint64_t u64[2];
 	double   pd[2];
-} __rte_aligned(16) xmm_t;
+} xmm_t;
 
 #define XMM_SIZE        (sizeof(xmm_t))
 #define XMM_MASK        (XMM_SIZE - 1)
 
 typedef union rte_xmm {
+	alignas(16)
 	xmm_t	 x;
 	uint8_t	 u8[XMM_SIZE / sizeof(uint8_t)];
 	uint16_t u16[XMM_SIZE / sizeof(uint16_t)];
 	uint32_t u32[XMM_SIZE / sizeof(uint32_t)];
 	uint64_t u64[XMM_SIZE / sizeof(uint64_t)];
 	double   pd[XMM_SIZE / sizeof(double)];
-} __rte_aligned(16) rte_xmm_t;
+} rte_xmm_t;
 
 static inline xmm_t
 vect_load_128(void *p)
diff --git a/lib/eal/ppc/include/rte_vect.h b/lib/eal/ppc/include/rte_vect.h
index a5f009b..e6702a4 100644
--- a/lib/eal/ppc/include/rte_vect.h
+++ b/lib/eal/ppc/include/rte_vect.h
@@ -6,6 +6,8 @@
 #ifndef _RTE_VECT_PPC_64_H_
 #define _RTE_VECT_PPC_64_H_
 
+#include <stdalign.h>
+
 #include "rte_altivec.h"
 
 #include "generic/rte_vect.h"
@@ -23,13 +25,14 @@
 #define	XMM_MASK	(XMM_SIZE - 1)
 
 typedef union rte_xmm {
+	alignas(16)
 	xmm_t    x;
 	uint8_t  u8[XMM_SIZE / sizeof(uint8_t)];
 	uint16_t u16[XMM_SIZE / sizeof(uint16_t)];
 	uint32_t u32[XMM_SIZE / sizeof(uint32_t)];
 	uint64_t u64[XMM_SIZE / sizeof(uint64_t)];
 	double   pd[XMM_SIZE / sizeof(double)];
-} __rte_aligned(16) rte_xmm_t;
+} rte_xmm_t;
 
 #ifdef __cplusplus
 }
diff --git a/lib/eal/riscv/include/rte_vect.h b/lib/eal/riscv/include/rte_vect.h
index 2f97f43..32d4386 100644
--- a/lib/eal/riscv/include/rte_vect.h
+++ b/lib/eal/riscv/include/rte_vect.h
@@ -7,6 +7,7 @@
 #ifndef RTE_VECT_RISCV_H
 #define RTE_VECT_RISCV_H
 
+#include <stdalign.h>
 #include <stdint.h>
 #include "generic/rte_vect.h"
 #include "rte_common.h"
@@ -23,13 +24,14 @@
 #define XMM_MASK	(XMM_SIZE - 1)
 
 typedef union rte_xmm {
+	alignas(16) /* !! NOTE !! changed to 16 it looks like this was a bug? */
 	xmm_t		x;
 	uint8_t		u8[XMM_SIZE / sizeof(uint8_t)];
 	uint16_t	u16[XMM_SIZE / sizeof(uint16_t)];
 	uint32_t	u32[XMM_SIZE / sizeof(uint32_t)];
 	uint64_t	u64[XMM_SIZE / sizeof(uint64_t)];
 	double		pd[XMM_SIZE / sizeof(double)];
-} __rte_aligned(8) rte_xmm_t;
+} rte_xmm_t;
 
 static inline xmm_t
 vect_load_128(void *p)
diff --git a/lib/eal/x86/include/rte_vect.h b/lib/eal/x86/include/rte_vect.h
index 560f9e4..2e5669d 100644
--- a/lib/eal/x86/include/rte_vect.h
+++ b/lib/eal/x86/include/rte_vect.h
@@ -11,6 +11,7 @@
  * RTE SSE/AVX related header.
  */
 
+#include <stdalign.h>
 #include <stdint.h>
 #include <rte_config.h>
 #include <rte_common.h>
@@ -92,6 +93,7 @@
 #define RTE_X86_ZMM_MASK	(RTE_X86_ZMM_SIZE - 1)
 
 typedef union __rte_x86_zmm {
+	alignas(RTE_X86_ZMM_SIZE)
 	__m512i	 z;
 	ymm_t    y[RTE_X86_ZMM_SIZE / sizeof(ymm_t)];
 	xmm_t    x[RTE_X86_ZMM_SIZE / sizeof(xmm_t)];
@@ -100,7 +102,7 @@
 	uint32_t u32[RTE_X86_ZMM_SIZE / sizeof(uint32_t)];
 	uint64_t u64[RTE_X86_ZMM_SIZE / sizeof(uint64_t)];
 	double   pd[RTE_X86_ZMM_SIZE / sizeof(double)];
-} __rte_aligned(RTE_X86_ZMM_SIZE) __rte_x86_zmm_t;
+} __rte_x86_zmm_t;
 
 #endif /* __AVX512F__ */
 
diff --git a/lib/eal/x86/rte_power_intrinsics.c b/lib/eal/x86/rte_power_intrinsics.c
index 532a2e6..5636543 100644
--- a/lib/eal/x86/rte_power_intrinsics.c
+++ b/lib/eal/x86/rte_power_intrinsics.c
@@ -2,6 +2,8 @@
  * Copyright(c) 2020 Intel Corporation
  */
 
+#include <stdalign.h>
+
 #include <rte_common.h>
 #include <rte_lcore.h>
 #include <rte_rtm.h>
@@ -13,9 +15,10 @@
  * Per-lcore structure holding current status of C0.2 sleeps.
  */
 static struct power_wait_status {
+	alignas(RTE_CACHE_LINE_SIZE)
 	rte_spinlock_t lock;
 	volatile void *monitor_addr; /**< NULL if not currently sleeping */
-} __rte_cache_aligned wait_status[RTE_MAX_LCORE];
+} wait_status[RTE_MAX_LCORE];
 
 /*
  * This function uses UMONITOR/UMWAIT instructions and will enter C0.2 state.
@@ -86,9 +89,10 @@ static void amd_mwaitx(const uint64_t timeout)
 }
 
 static struct {
+	alignas(RTE_CACHE_LINE_SIZE)
 	void (*mmonitor)(volatile void *addr);
 	void (*mwait)(const uint64_t timeout);
-} __rte_cache_aligned power_monitor_ops;
+} power_monitor_ops;
 
 static inline void
 __umwait_wakeup(volatile void *addr)
