[PATCH v4 21/39] power: use C11 alignas

[Tyler Retzlaff <roretzla@linux.microsoft.com>]

* 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/power/power_acpi_cpufreq.c       | 4 ++--
 lib/power/power_amd_pstate_cpufreq.c | 4 ++--
 lib/power/power_cppc_cpufreq.c       | 4 ++--
 lib/power/power_intel_uncore.c       | 4 ++--
 lib/power/power_pstate_cpufreq.c     | 4 ++--
 lib/power/rte_power_pmd_mgmt.c       | 4 ++--
 6 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/lib/power/power_acpi_cpufreq.c b/lib/power/power_acpi_cpufreq.c
index f8d978d..81996e1 100644
--- a/lib/power/power_acpi_cpufreq.c
+++ b/lib/power/power_acpi_cpufreq.c
@@ -41,7 +41,7 @@ enum power_state {
 /**
  * Power info per lcore.
  */
-struct acpi_power_info {
+struct __rte_cache_aligned acpi_power_info {
 	unsigned int lcore_id;               /**< Logical core id */
 	uint32_t freqs[RTE_MAX_LCORE_FREQS]; /**< Frequency array */
 	uint32_t nb_freqs;                   /**< number of available freqs */
@@ -51,7 +51,7 @@ struct acpi_power_info {
 	RTE_ATOMIC(uint32_t) state;          /**< Power in use state */
 	uint16_t turbo_available;            /**< Turbo Boost available */
 	uint16_t turbo_enable;               /**< Turbo Boost enable/disable */
-} __rte_cache_aligned;
+};
 
 static struct acpi_power_info lcore_power_info[RTE_MAX_LCORE];
 
diff --git a/lib/power/power_amd_pstate_cpufreq.c b/lib/power/power_amd_pstate_cpufreq.c
index 028f844..090a0d9 100644
--- a/lib/power/power_amd_pstate_cpufreq.c
+++ b/lib/power/power_amd_pstate_cpufreq.c
@@ -45,7 +45,7 @@ enum power_state {
 /**
  * Power info per lcore.
  */
-struct amd_pstate_power_info {
+struct __rte_cache_aligned amd_pstate_power_info {
 	uint32_t lcore_id;                   /**< Logical core id */
 	RTE_ATOMIC(uint32_t) state;          /**< Power in use state */
 	FILE *f;                             /**< FD of scaling_setspeed */
@@ -58,7 +58,7 @@ struct amd_pstate_power_info {
 	uint16_t turbo_enable;               /**< Turbo Boost enable/disable */
 	uint32_t nb_freqs;                   /**< number of available freqs */
 	uint32_t freqs[RTE_MAX_LCORE_FREQS]; /**< Frequency array */
-} __rte_cache_aligned;
+};
 
 static struct amd_pstate_power_info lcore_power_info[RTE_MAX_LCORE];
 
diff --git a/lib/power/power_cppc_cpufreq.c b/lib/power/power_cppc_cpufreq.c
index 3ddf39b..32aaacb 100644
--- a/lib/power/power_cppc_cpufreq.c
+++ b/lib/power/power_cppc_cpufreq.c
@@ -49,7 +49,7 @@ enum power_state {
 /**
  * Power info per lcore.
  */
-struct cppc_power_info {
+struct __rte_cache_aligned cppc_power_info {
 	unsigned int lcore_id;               /**< Logical core id */
 	RTE_ATOMIC(uint32_t) state;          /**< Power in use state */
 	FILE *f;                             /**< FD of scaling_setspeed */
@@ -61,7 +61,7 @@ struct cppc_power_info {
 	uint16_t turbo_enable;               /**< Turbo Boost enable/disable */
 	uint32_t nb_freqs;                   /**< number of available freqs */
 	uint32_t freqs[RTE_MAX_LCORE_FREQS]; /**< Frequency array */
-} __rte_cache_aligned;
+};
 
 static struct cppc_power_info lcore_power_info[RTE_MAX_LCORE];
 
diff --git a/lib/power/power_intel_uncore.c b/lib/power/power_intel_uncore.c
index 3ce8fcc..9c152e4 100644
--- a/lib/power/power_intel_uncore.c
+++ b/lib/power/power_intel_uncore.c
@@ -29,7 +29,7 @@
 		"/sys/devices/system/cpu/intel_uncore_frequency/package_%02u_die_%02u/initial_min_freq_khz"
 
 
-struct uncore_power_info {
+struct __rte_cache_aligned uncore_power_info {
 	unsigned int die;                  /* Core die id */
 	unsigned int pkg;                  /* Package id */
 	uint32_t freqs[MAX_UNCORE_FREQS];  /* Frequency array */
@@ -41,7 +41,7 @@ struct uncore_power_info {
 	uint32_t org_max_freq;             /* Original max freq of uncore */
 	uint32_t init_max_freq;            /* System max uncore freq */
 	uint32_t init_min_freq;            /* System min uncore freq */
-} __rte_cache_aligned;
+};
 
 static struct uncore_power_info uncore_info[RTE_MAX_NUMA_NODES][MAX_NUMA_DIE];
 
diff --git a/lib/power/power_pstate_cpufreq.c b/lib/power/power_pstate_cpufreq.c
index 73138dc..2343121 100644
--- a/lib/power/power_pstate_cpufreq.c
+++ b/lib/power/power_pstate_cpufreq.c
@@ -49,7 +49,7 @@ enum power_state {
 	POWER_UNKNOWN
 };
 
-struct pstate_power_info {
+struct __rte_cache_aligned pstate_power_info {
 	unsigned int lcore_id;               /**< Logical core id */
 	uint32_t freqs[RTE_MAX_LCORE_FREQS]; /**< Frequency array */
 	uint32_t nb_freqs;                   /**< number of available freqs */
@@ -64,7 +64,7 @@ struct pstate_power_info {
 	uint16_t turbo_available;            /**< Turbo Boost available */
 	uint16_t turbo_enable;               /**< Turbo Boost enable/disable */
 	uint16_t priority_core;              /**< High Performance core */
-} __rte_cache_aligned;
+};
 
 
 static struct pstate_power_info lcore_power_info[RTE_MAX_LCORE];
diff --git a/lib/power/rte_power_pmd_mgmt.c b/lib/power/rte_power_pmd_mgmt.c
index 591fc69..b1c18a5 100644
--- a/lib/power/rte_power_pmd_mgmt.c
+++ b/lib/power/rte_power_pmd_mgmt.c
@@ -55,7 +55,7 @@ struct queue_list_entry {
 	const struct rte_eth_rxtx_callback *cb;
 };
 
-struct pmd_core_cfg {
+struct __rte_cache_aligned pmd_core_cfg {
 	TAILQ_HEAD(queue_list_head, queue_list_entry) head;
 	/**< List of queues associated with this lcore */
 	size_t n_queues;
@@ -68,7 +68,7 @@ struct pmd_core_cfg {
 	/**< Number of queues ready to enter power optimized state */
 	uint64_t sleep_target;
 	/**< Prevent a queue from triggering sleep multiple times */
-} __rte_cache_aligned;
+};
 static struct pmd_core_cfg lcore_cfgs[RTE_MAX_LCORE];
 
 static inline bool
-- 
1.8.3.1