futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() test

[cascardo/linux.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index 009a797..d56cb03 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1387,6 +1387,13 @@ config FUTEX
          support for "fast userspace mutexes".  The resulting kernel may not
          run glibc-based applications correctly.
 
+config HAVE_FUTEX_CMPXCHG
+       bool
+       help
+         Architectures should select this if futex_atomic_cmpxchg_inatomic()
+         is implemented and always working. This removes a couple of runtime
+         checks.
+
 config EPOLL
        bool "Enable eventpoll support" if EXPERT
        default y