mem: fix API doc about allocation on secondary processes

Since 10 years, memzone allocation is allowed on secondary
processes. Now it's time to update the documentation accordingly.

At the same time, fix mempool, mbuf and ring documentation which rely on
memzones internally.

Bugzilla ID: 1074
Fixes: 916e4f4f4e ("memory: fix for multi process support")
Cc: stable@dpdk.org

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>

lib/eal/include/rte_memzone.h

@@ -118,7 +118,6 @@ struct rte_memzone {
  *   on error.
  *   On error case, rte_errno will be set appropriately:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists
  *    - ENOMEM - no appropriate memory area found in which to create memzone
@@ -184,7 +183,6 @@ const struct rte_memzone *rte_memzone_reserve(const char *name,
  *   on error.
  *   On error case, rte_errno will be set appropriately:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists
  *    - ENOMEM - no appropriate memory area found in which to create memzone
@@ -256,7 +254,6 @@ const struct rte_memzone *rte_memzone_reserve_aligned(const char *name,
  *   on error.
  *   On error case, rte_errno will be set appropriately:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists
  *    - ENOMEM - no appropriate memory area found in which to create memzone

lib/mbuf/rte_mbuf.h

@@ -664,7 +664,6 @@ void rte_pktmbuf_pool_init(struct rte_mempool *mp, void *opaque_arg);
  *   The pointer to the new allocated mempool, on success. NULL on error
  *   with rte_errno set appropriately. Possible rte_errno values include:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - EINVAL - cache size provided is too large, or priv_size is not aligned.
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists
@@ -706,7 +705,6 @@ rte_pktmbuf_pool_create(const char *name, unsigned n,
  *   The pointer to the new allocated mempool, on success. NULL on error
  *   with rte_errno set appropriately. Possible rte_errno values include:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - EINVAL - cache size provided is too large, or priv_size is not aligned.
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists
@@ -760,7 +758,6 @@ struct rte_pktmbuf_extmem {
  *   The pointer to the new allocated mempool, on success. NULL on error
  *   with rte_errno set appropriately. Possible rte_errno values include:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - EINVAL - cache size provided is too large, or priv_size is not aligned.
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists

lib/mempool/rte_mempool.h

@@ -1023,7 +1023,6 @@ typedef void (rte_mempool_ctor_t)(struct rte_mempool *, void *);
  *   The pointer to the new allocated mempool, on success. NULL on error
  *   with rte_errno set appropriately. Possible rte_errno values include:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - EINVAL - cache size provided is too large or an unknown flag was passed
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists

lib/ring/rte_ring.h

@@ -180,7 +180,6 @@ int rte_ring_init(struct rte_ring *r, const char *name, unsigned int count,
  *   On success, the pointer to the new allocated ring. NULL on error with
  *    rte_errno set appropriately. Possible errno values include:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - EINVAL - count provided is not a power of 2
  *    - ENOSPC - the maximum number of memzones has already been allocated
  *    - EEXIST - a memzone with the same name already exists

lib/ring/rte_ring_elem.h

@@ -96,7 +96,6 @@ ssize_t rte_ring_get_memsize_elem(unsigned int esize, unsigned int count);
  *   On success, the pointer to the new allocated ring. NULL on error with
  *    rte_errno set appropriately. Possible errno values include:
  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
- *    - E_RTE_SECONDARY - function was called from a secondary process instance
  *    - EINVAL - esize is not a multiple of 4 or count provided is not a
  *		 power of 2.
  *    - ENOSPC - the maximum number of memzones has already been allocated