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authorFlorian Weimer <fweimer@redhat.com>2015-12-23 17:23:33 +0100
committerFlorian Weimer <fweimer@redhat.com>2015-12-23 17:23:33 +0100
commit7962541a32eff5597bc4207e781cfac8d1bb0d87 (patch)
tree32d51de1baa5ff519f5b12c62230fd0d77c36688 /malloc
parentc676e659395f145e45b08fe3bba90c29ab44e8b8 (diff)
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malloc: Update comment for list_lock
Diffstat (limited to 'malloc')
-rw-r--r--malloc/arena.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/malloc/arena.c b/malloc/arena.c
index 85f119474b..665be5ec35 100644
--- a/malloc/arena.c
+++ b/malloc/arena.c
@@ -85,9 +85,10 @@ static mstate free_list;
    _int_new_arena.  This suffers from data races; see the FIXME
    comments in _int_new_arena and reused_arena.
 
-   list_lock also prevents concurrent forks.  When list_lock is
-   acquired, no arena lock must be acquired, but it is permitted to
-   acquire arena locks after list_lock.  */
+   list_lock also prevents concurrent forks.  At the time list_lock is
+   acquired, no arena lock must have been acquired, but it is
+   permitted to acquire arena locks subsequently, while list_lock is
+   acquired.  */
 static mutex_t list_lock = _LIBC_LOCK_INITIALIZER;
 
 /* Mapped memory in non-main arenas (reliable only for NO_THREADS). */