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-rw-r--r--nptl/sysdeps/pthread/bits/stdio-lock.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/nptl/sysdeps/pthread/bits/stdio-lock.h b/nptl/sysdeps/pthread/bits/stdio-lock.h
index ea622e4142..fbb14a1120 100644
--- a/nptl/sysdeps/pthread/bits/stdio-lock.h
+++ b/nptl/sysdeps/pthread/bits/stdio-lock.h
@@ -24,6 +24,9 @@
#include <lowlevellock.h>
+/* The locking here is very inexpensive, even for inlining. */
+#define _IO_lock_inexpensive 1
+
typedef struct { int lock; int cnt; void *owner; } _IO_lock_t;
#define _IO_lock_initializer { LLL_MUTEX_LOCK_INITIALIZER, 0, NULL }