[dpdk-dev] [PATCH v2 4/4] lib: reduce global variable usage

[Ferruh Yigit <ferruh.yigit@intel.com>]

Some global variables can be eliminated, since they are not part of
public interface, it is free to remove them.

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
 lib/librte_compressdev/rte_compressdev.c     | 32 ++++++++----------
 lib/librte_compressdev/rte_compressdev_pmd.h |  5 ---
 lib/librte_cryptodev/rte_cryptodev.c         | 34 +++++++++-----------
 lib/librte_cryptodev/rte_cryptodev_pmd.h     |  3 --
 lib/librte_eventdev/rte_eventdev.c           |  8 ++---
 lib/librte_eventdev/rte_eventdev_pmd.h       |  2 --
 lib/librte_rawdev/rte_rawdev.c               | 10 +++---
 lib/librte_rawdev/rte_rawdev_pmd.h           |  2 --
 8 files changed, 37 insertions(+), 59 deletions(-)

diff --git a/lib/librte_compressdev/rte_compressdev.c b/lib/librte_compressdev/rte_compressdev.c
index 9091dd6ee..10101ebbe 100644
--- a/lib/librte_compressdev/rte_compressdev.c
+++ b/lib/librte_compressdev/rte_compressdev.c
@@ -18,19 +18,15 @@
 #define RTE_COMPRESSDEV_DETACHED  (0)
 #define RTE_COMPRESSDEV_ATTACHED  (1)
 
-struct rte_compressdev rte_comp_devices[RTE_COMPRESS_MAX_DEVS];
-
-struct rte_compressdev *rte_compressdevs = &rte_comp_devices[0];
+static struct rte_compressdev rte_comp_devices[RTE_COMPRESS_MAX_DEVS];
 
 static struct rte_compressdev_global compressdev_globals = {
-		.devs			= &rte_comp_devices[0],
+		.devs			= rte_comp_devices,
 		.data			= { NULL },
 		.nb_devs		= 0,
 		.max_devs		= RTE_COMPRESS_MAX_DEVS
 };
 
-struct rte_compressdev_global *rte_compressdev_globals = &compressdev_globals;
-
 const struct rte_compressdev_capabilities * __rte_experimental
 rte_compressdev_capability_get(uint8_t dev_id,
 			enum rte_comp_algorithm algo)
@@ -78,7 +74,7 @@ rte_compressdev_get_feature_name(uint64_t flag)
 static struct rte_compressdev *
 rte_compressdev_get_dev(uint8_t dev_id)
 {
-	return &rte_compressdev_globals->devs[dev_id];
+	return &compressdev_globals.devs[dev_id];
 }
 
 struct rte_compressdev * __rte_experimental
@@ -90,8 +86,8 @@ rte_compressdev_pmd_get_named_dev(const char *name)
 	if (name == NULL)
 		return NULL;
 
-	for (i = 0; i < rte_compressdev_globals->max_devs; i++) {
-		dev = &rte_compressdev_globals->devs[i];
+	for (i = 0; i < compressdev_globals.max_devs; i++) {
+		dev = &compressdev_globals.devs[i];
 
 		if ((dev->attached == RTE_COMPRESSDEV_ATTACHED) &&
 				(strcmp(dev->data->name, name) == 0))
@@ -106,7 +102,7 @@ rte_compressdev_is_valid_dev(uint8_t dev_id)
 {
 	struct rte_compressdev *dev = NULL;
 
-	if (dev_id >= rte_compressdev_globals->nb_devs)
+	if (dev_id >= compressdev_globals.nb_devs)
 		return 0;
 
 	dev = rte_compressdev_get_dev(dev_id);
@@ -125,10 +121,10 @@ rte_compressdev_get_dev_id(const char *name)
 	if (name == NULL)
 		return -1;
 
-	for (i = 0; i < rte_compressdev_globals->nb_devs; i++)
-		if ((strcmp(rte_compressdev_globals->devs[i].data->name, name)
+	for (i = 0; i < compressdev_globals.nb_devs; i++)
+		if ((strcmp(compressdev_globals.devs[i].data->name, name)
 				== 0) &&
-				(rte_compressdev_globals->devs[i].attached ==
+				(compressdev_globals.devs[i].attached ==
 						RTE_COMPRESSDEV_ATTACHED))
 			return i;
 
@@ -138,7 +134,7 @@ rte_compressdev_get_dev_id(const char *name)
 uint8_t __rte_experimental
 rte_compressdev_count(void)
 {
-	return rte_compressdev_globals->nb_devs;
+	return compressdev_globals.nb_devs;
 }
 
 uint8_t __rte_experimental
@@ -146,8 +142,8 @@ rte_compressdev_devices_get(const char *driver_name, uint8_t *devices,
 	uint8_t nb_devices)
 {
 	uint8_t i, count = 0;
-	struct rte_compressdev *devs = rte_compressdev_globals->devs;
-	uint8_t max_devs = rte_compressdev_globals->max_devs;
+	struct rte_compressdev *devs = compressdev_globals.devs;
+	uint8_t max_devs = compressdev_globals.max_devs;
 
 	for (i = 0; i < max_devs && count < nb_devices;	i++) {
 
@@ -578,7 +574,7 @@ uint16_t __rte_experimental
 rte_compressdev_dequeue_burst(uint8_t dev_id, uint16_t qp_id,
 		struct rte_comp_op **ops, uint16_t nb_ops)
 {
-	struct rte_compressdev *dev = &rte_compressdevs[dev_id];
+	struct rte_compressdev *dev = &rte_comp_devices[dev_id];
 
 	nb_ops = (*dev->dequeue_burst)
 			(dev->data->queue_pairs[qp_id], ops, nb_ops);
@@ -590,7 +586,7 @@ uint16_t __rte_experimental
 rte_compressdev_enqueue_burst(uint8_t dev_id, uint16_t qp_id,
 		struct rte_comp_op **ops, uint16_t nb_ops)
 {
-	struct rte_compressdev *dev = &rte_compressdevs[dev_id];
+	struct rte_compressdev *dev = &rte_comp_devices[dev_id];
 
 	return (*dev->enqueue_burst)(
 			dev->data->queue_pairs[qp_id], ops, nb_ops);
diff --git a/lib/librte_compressdev/rte_compressdev_pmd.h b/lib/librte_compressdev/rte_compressdev_pmd.h
index 38e9ea02b..043353c99 100644
--- a/lib/librte_compressdev/rte_compressdev_pmd.h
+++ b/lib/librte_compressdev/rte_compressdev_pmd.h
@@ -51,11 +51,6 @@ struct rte_compressdev_global {
 	uint8_t max_devs;		/**< Max number of devices */
 };
 
-/** Pointer to global array of comp devices */
-extern struct rte_compressdev *rte_compressdevs;
-/** Pointer to global comp devices data structure */
-extern struct rte_compressdev_global *rte_compressdev_globals;
-
 /**
  * Get the rte_compressdev structure device pointer for the named device.
  *
diff --git a/lib/librte_cryptodev/rte_cryptodev.c b/lib/librte_cryptodev/rte_cryptodev.c
index 63ae23f00..6c3c2a9cd 100644
--- a/lib/librte_cryptodev/rte_cryptodev.c
+++ b/lib/librte_cryptodev/rte_cryptodev.c
@@ -43,19 +43,17 @@
 
 static uint8_t nb_drivers;
 
-struct rte_cryptodev rte_crypto_devices[RTE_CRYPTO_MAX_DEVS];
+static struct rte_cryptodev rte_crypto_devices[RTE_CRYPTO_MAX_DEVS];
 
-struct rte_cryptodev *rte_cryptodevs = &rte_crypto_devices[0];
+struct rte_cryptodev *rte_cryptodevs = rte_crypto_devices;
 
 static struct rte_cryptodev_global cryptodev_globals = {
-		.devs			= &rte_crypto_devices[0],
+		.devs			= rte_crypto_devices,
 		.data			= { NULL },
 		.nb_devs		= 0,
 		.max_devs		= RTE_CRYPTO_MAX_DEVS
 };
 
-struct rte_cryptodev_global *rte_cryptodev_globals = &cryptodev_globals;
-
 /* spinlock for crypto device callbacks */
 static rte_spinlock_t rte_cryptodev_cb_lock = RTE_SPINLOCK_INITIALIZER;
 
@@ -486,7 +484,7 @@ rte_cryptodev_get_feature_name(uint64_t flag)
 struct rte_cryptodev *
 rte_cryptodev_pmd_get_dev(uint8_t dev_id)
 {
-	return &rte_cryptodev_globals->devs[dev_id];
+	return &cryptodev_globals.devs[dev_id];
 }
 
 struct rte_cryptodev *
@@ -498,8 +496,8 @@ rte_cryptodev_pmd_get_named_dev(const char *name)
 	if (name == NULL)
 		return NULL;
 
-	for (i = 0; i < rte_cryptodev_globals->max_devs; i++) {
-		dev = &rte_cryptodev_globals->devs[i];
+	for (i = 0; i < cryptodev_globals.max_devs; i++) {
+		dev = &cryptodev_globals.devs[i];
 
 		if ((dev->attached == RTE_CRYPTODEV_ATTACHED) &&
 				(strcmp(dev->data->name, name) == 0))
@@ -514,7 +512,7 @@ rte_cryptodev_pmd_is_valid_dev(uint8_t dev_id)
 {
 	struct rte_cryptodev *dev = NULL;
 
-	if (dev_id >= rte_cryptodev_globals->nb_devs)
+	if (dev_id >= cryptodev_globals.nb_devs)
 		return 0;
 
 	dev = rte_cryptodev_pmd_get_dev(dev_id);
@@ -533,10 +531,10 @@ rte_cryptodev_get_dev_id(const char *name)
 	if (name == NULL)
 		return -1;
 
-	for (i = 0; i < rte_cryptodev_globals->nb_devs; i++)
-		if ((strcmp(rte_cryptodev_globals->devs[i].data->name, name)
+	for (i = 0; i < cryptodev_globals.nb_devs; i++)
+		if ((strcmp(cryptodev_globals.devs[i].data->name, name)
 				== 0) &&
-				(rte_cryptodev_globals->devs[i].attached ==
+				(cryptodev_globals.devs[i].attached ==
 						RTE_CRYPTODEV_ATTACHED))
 			return i;
 
@@ -546,7 +544,7 @@ rte_cryptodev_get_dev_id(const char *name)
 uint8_t
 rte_cryptodev_count(void)
 {
-	return rte_cryptodev_globals->nb_devs;
+	return cryptodev_globals.nb_devs;
 }
 
 uint8_t
@@ -554,9 +552,9 @@ rte_cryptodev_device_count_by_driver(uint8_t driver_id)
 {
 	uint8_t i, dev_count = 0;
 
-	for (i = 0; i < rte_cryptodev_globals->max_devs; i++)
-		if (rte_cryptodev_globals->devs[i].driver_id == driver_id &&
-			rte_cryptodev_globals->devs[i].attached ==
+	for (i = 0; i < cryptodev_globals.max_devs; i++)
+		if (cryptodev_globals.devs[i].driver_id == driver_id &&
+			cryptodev_globals.devs[i].attached ==
 					RTE_CRYPTODEV_ATTACHED)
 			dev_count++;
 
@@ -568,8 +566,8 @@ rte_cryptodev_devices_get(const char *driver_name, uint8_t *devices,
 	uint8_t nb_devices)
 {
 	uint8_t i, count = 0;
-	struct rte_cryptodev *devs = rte_cryptodev_globals->devs;
-	uint8_t max_devs = rte_cryptodev_globals->max_devs;
+	struct rte_cryptodev *devs = cryptodev_globals.devs;
+	uint8_t max_devs = cryptodev_globals.max_devs;
 
 	for (i = 0; i < max_devs && count < nb_devices;	i++) {
 
diff --git a/lib/librte_cryptodev/rte_cryptodev_pmd.h b/lib/librte_cryptodev/rte_cryptodev_pmd.h
index 6ff49d64d..1b6cafd17 100644
--- a/lib/librte_cryptodev/rte_cryptodev_pmd.h
+++ b/lib/librte_cryptodev/rte_cryptodev_pmd.h
@@ -71,9 +71,6 @@ struct cryptodev_driver {
 	uint8_t id;
 };
 
-/** pointer to global crypto devices data structure. */
-extern struct rte_cryptodev_global *rte_cryptodev_globals;
-
 /**
  * Get the rte_cryptodev structure device pointer for the device. Assumes a
  * valid device index.
diff --git a/lib/librte_eventdev/rte_eventdev.c b/lib/librte_eventdev/rte_eventdev.c
index e70315e49..ebaf3087d 100644
--- a/lib/librte_eventdev/rte_eventdev.c
+++ b/lib/librte_eventdev/rte_eventdev.c
@@ -37,20 +37,18 @@
 
 static struct rte_eventdev rte_event_devices[RTE_EVENT_MAX_DEVS];
 
-struct rte_eventdev *rte_eventdevs = &rte_event_devices[0];
+struct rte_eventdev *rte_eventdevs = rte_event_devices;
 
 static struct rte_eventdev_global eventdev_globals = {
 	.nb_devs		= 0
 };
 
-struct rte_eventdev_global *rte_eventdev_globals = &eventdev_globals;
-
 /* Event dev north bound API implementation */
 
 uint8_t
 rte_event_dev_count(void)
 {
-	return rte_eventdev_globals->nb_devs;
+	return eventdev_globals.nb_devs;
 }
 
 int
@@ -62,7 +60,7 @@ rte_event_dev_get_dev_id(const char *name)
 	if (!name)
 		return -EINVAL;
 
-	for (i = 0; i < rte_eventdev_globals->nb_devs; i++) {
+	for (i = 0; i < eventdev_globals.nb_devs; i++) {
 		cmp = (strncmp(rte_event_devices[i].data->name, name,
 				RTE_EVENTDEV_NAME_MAX_LEN) == 0) ||
 			(rte_event_devices[i].dev ? (strncmp(
diff --git a/lib/librte_eventdev/rte_eventdev_pmd.h b/lib/librte_eventdev/rte_eventdev_pmd.h
index aa6e52c63..1a01326b8 100644
--- a/lib/librte_eventdev/rte_eventdev_pmd.h
+++ b/lib/librte_eventdev/rte_eventdev_pmd.h
@@ -87,8 +87,6 @@ struct rte_eventdev_global {
 	uint8_t nb_devs;	/**< Number of devices found */
 };
 
-extern struct rte_eventdev_global *rte_eventdev_globals;
-/** Pointer to global event devices data structure. */
 extern struct rte_eventdev *rte_eventdevs;
 /** The pool of rte_eventdev structures. */
 
diff --git a/lib/librte_rawdev/rte_rawdev.c b/lib/librte_rawdev/rte_rawdev.c
index 62b6b97ef..9f1e3592d 100644
--- a/lib/librte_rawdev/rte_rawdev.c
+++ b/lib/librte_rawdev/rte_rawdev.c
@@ -35,21 +35,19 @@
 /* dynamic log identifier */
 int librawdev_logtype;
 
-struct rte_rawdev rte_rawdevices[RTE_RAWDEV_MAX_DEVS];
+static struct rte_rawdev rte_rawdevices[RTE_RAWDEV_MAX_DEVS];
 
-struct rte_rawdev *rte_rawdevs = &rte_rawdevices[0];
+struct rte_rawdev *rte_rawdevs = rte_rawdevices;
 
 static struct rte_rawdev_global rawdev_globals = {
 	.nb_devs		= 0
 };
 
-struct rte_rawdev_global *rte_rawdev_globals = &rawdev_globals;
-
 /* Raw device, northbound API implementation */
 uint8_t
 rte_rawdev_count(void)
 {
-	return rte_rawdev_globals->nb_devs;
+	return rawdev_globals.nb_devs;
 }
 
 uint16_t
@@ -60,7 +58,7 @@ rte_rawdev_get_dev_id(const char *name)
 	if (!name)
 		return -EINVAL;
 
-	for (i = 0; i < rte_rawdev_globals->nb_devs; i++)
+	for (i = 0; i < rawdev_globals.nb_devs; i++)
 		if ((strcmp(rte_rawdevices[i].name, name)
 				== 0) &&
 				(rte_rawdevices[i].attached ==
diff --git a/lib/librte_rawdev/rte_rawdev_pmd.h b/lib/librte_rawdev/rte_rawdev_pmd.h
index bb9bbc350..811e51d07 100644
--- a/lib/librte_rawdev/rte_rawdev_pmd.h
+++ b/lib/librte_rawdev/rte_rawdev_pmd.h
@@ -73,8 +73,6 @@ struct rte_rawdev_global {
 	uint16_t nb_devs;
 };
 
-extern struct rte_rawdev_global *rte_rawdev_globals;
-/** Pointer to global raw devices data structure. */
 extern struct rte_rawdev *rte_rawdevs;
 /** The pool of rte_rawdev structures. */
 
-- 
2.17.1