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Diffstat (limited to 'nptl/sysdeps/pthread/bits/stdio-lock.h')
-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 }