frv: add missing atomic64 operations

Some more atomic64 operations were missing and as a result frv
allmodconfig was failing.  Add the missing operations.

Link: http://lkml.kernel.org/r/1485193844-12850-1-git-send-email-sudip.mukherjee@codethink.co.uk
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/frv/include/asm/atomic.h b/arch/frv/include/asm/atomic.h
index 994ed3d..e93c949 100644 (file)
--- a/arch/frv/include/asm/atomic.h
+++ b/arch/frv/include/asm/atomic.h
@@ -139,7 +139,7 @@ static inline void atomic64_dec(atomic64_t *v)
 #define atomic64_sub_and_test(i,v)     (atomic64_sub_return((i), (v)) == 0)
 #define atomic64_dec_and_test(v)       (atomic64_dec_return((v)) == 0)
 #define atomic64_inc_and_test(v)       (atomic64_inc_return((v)) == 0)
-
+#define atomic64_inc_not_zero(v)       atomic64_add_unless((v), 1, 0)
 
 #define atomic_cmpxchg(v, old, new)    (cmpxchg(&(v)->counter, old, new))
 #define atomic_xchg(v, new)            (xchg(&(v)->counter, new))
@@ -177,6 +177,23 @@ static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u)
        return c != u;
 }
 
+static inline long long atomic64_dec_if_positive(atomic64_t *v)
+{
+       long long c, old, dec;
+
+       c = atomic64_read(v);
+       for (;;) {
+               dec = c - 1;
+               if (unlikely(dec < 0))
+                       break;
+               old = atomic64_cmpxchg((v), c, dec);
+               if (likely(old == c))
+                       break;
+               c = old;
+       }
+               return dec;
+}
+
 #define ATOMIC_OP(op)                                                  \
 static inline int atomic_fetch_##op(int i, atomic_t *v)                        \
 {                                                                      \