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malloc: Update comment for list_lock

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This commit is contained in:
Florian Weimer
2015-12-23 17:23:33 +01:00
parent c676e65939
commit 7962541a32
2 changed files with 8 additions and 3 deletions
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ChangeLog
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@@ -1,3 +1,7 @@
2015-12-23 Florian Weimer <fweimer@redhat.com>
* malloc/arena.c (list_lock): Update comment.
2015-12-22 Carlos Eduardo Seo <cseo@linux.vnet.ibm.com> 2015-12-22 Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
* sysdeps/powerpc/hwcapinfo.c: Export symbol * sysdeps/powerpc/hwcapinfo.c: Export symbol

7
malloc/arena.c
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@@ -85,9 +85,10 @@ static mstate free_list;
_int_new_arena. This suffers from data races; see the FIXME _int_new_arena. This suffers from data races; see the FIXME
comments in _int_new_arena and reused_arena. comments in _int_new_arena and reused_arena.
list_lock also prevents concurrent forks. When list_lock is list_lock also prevents concurrent forks. At the time list_lock is
acquired, no arena lock must be acquired, but it is permitted to acquired, no arena lock must have been acquired, but it is
acquire arena locks after list_lock. */ permitted to acquire arena locks subsequently, while list_lock is
acquired. */
static mutex_t list_lock = _LIBC_LOCK_INITIALIZER; static mutex_t list_lock = _LIBC_LOCK_INITIALIZER;
/* Mapped memory in non-main arenas (reliable only for NO_THREADS). */ /* Mapped memory in non-main arenas (reliable only for NO_THREADS). */