[LIB]: Consolidate _atomic_dec_and_lock()

Several implementations were essentialy a common piece of C code using
the cmpxchg() macro.  Put the implementation in one spot that everyone
can share, and convert sparc64 over to using this.

Alpha is the lone arch-specific implementation, which codes up a
special fast path for the common case in order to avoid GP reloading
which a pure C version would require.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 4 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 0eb71ac303af..4cd724c05700 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1009,10 +1009,6 @@ config GENERIC_CALIBRATE_DELAY
         bool
         default y
 
-config HAVE_DEC_LOCK
-        bool
-        default y
-
 #
 # Select some configuration options automatically based on user selections.
 #