[PATCH] spinlock: fix API comments

[Thomas Monjalon]

This is not a read-write lock.

The user field stores the thread ID, not the core ID.

The implementation is architecture-specific in some cases only.

Reported-by: Stephen Hemminger <stephen at networkplumber.org>
Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
---
 lib/eal/include/generic/rte_spinlock.h | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/lib/eal/include/generic/rte_spinlock.h b/lib/eal/include/generic/rte_spinlock.h
index 19c0e34f0a..d9f255f8c4 100644
--- a/lib/eal/include/generic/rte_spinlock.h
+++ b/lib/eal/include/generic/rte_spinlock.h
@@ -7,12 +7,16 @@
 
 /**
  * @file
+ * DPDK spinlocks
  *
- * RTE Spinlocks
+ * This is an API for spinlocks.
+ * This kind of lock simply waits in a loop
+ * repeatedly checking until the lock becomes available.
  *
- * This file defines an API for read-write locks, which are implemented
- * in an architecture-specific way. This kind of lock simply waits in
- * a loop repeatedly checking until the lock becomes available.
+ * Some functions may have an architecture-specific implementation
+ * if RTE_FORCE_INTRINSICS is disabled.
+ * The hardware transactional memory (lock elision) functions have _tm suffix
+ * and are implemented in architecture-specific files.
  *
  * All locks must be initialised before use, and only initialised once.
  */
@@ -197,7 +201,7 @@ rte_spinlock_trylock_tm(rte_spinlock_t *sl)
  */
 typedef struct {
 	rte_spinlock_t sl; /**< the actual spinlock */
-	int user; /**< core id using lock, -1 for unused */
+	int user; /**< thread id using lock, -1 for unused */
 	int count; /**< count of time this lock has been called */
 } rte_spinlock_recursive_t;
 
-- 
2.54.0