Generic semaphore implementation

Semaphores are no longer performance-critical, so a generic C
implementation is better for maintainability, debuggability and
extensibility.  Thanks to Peter Zijlstra for fixing the lockdep
warning.  Thanks to Harvey Harrison for pointing out that the
unlikely() was unnecessary.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 3 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6c70fed0f9a0..e4b38861ea52 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -53,9 +53,6 @@ config STACKTRACE_SUPPORT
 config HAVE_LATENCYTOP_SUPPORT
         def_bool y
 
-config SEMAPHORE_SLEEPERS
-        def_bool y
-
 config FAST_CMPXCHG_LOCAL
         bool
         default y