libc: Fix sem_post() implementation to wake up all waiting threads.
This also allows us to optimize the case where we increment an
uncontended semaphore (no need to call futex_wake() then).
Change-Id: Iad48efe8551dc66dc89d3e3f18c001e5a6c1939f
diff --git a/libc/unistd/sysconf.c b/libc/unistd/sysconf.c
index 27b113c..9377802 100644
--- a/libc/unistd/sysconf.c
+++ b/libc/unistd/sysconf.c
@@ -44,7 +44,7 @@
#define SYSTEM_MQ_OPEN_MAX 8
#define SYSTEM_MQ_PRIO_MAX 32768
#define SYSTEM_SEM_NSEMS_MAX 256
-#define SYSTEM_SEM_VALUE_MAX (2147483647)
+#define SYSTEM_SEM_VALUE_MAX 0x3fffffff /* see bionic/semaphore.c */
#define SYSTEM_SIGQUEUE_MAX 32
#define SYSTEM_TIMER_MAX 32
#define SYSTEM_LOGIN_NAME_MAX 256