bcachefs: per_cpu_sum()

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/util.h b/fs/bcachefs/util.h
index cd09edd12d8a5f8b3d0203ce27ebb90ab1a72b5f..2def4f761ca6430bc360d086d5faa7997aa212db 100644 (file)
--- a/fs/bcachefs/util.h
+++ b/fs/bcachefs/util.h
@@ -698,14 +698,19 @@ do {                                                                      \
        }                                                               \
 } while (0)
 
+#define per_cpu_sum(_p)                                                        \
+({                                                                     \
+       typeof(*_p) _ret = 0;                                           \
+                                                                       \
+       int cpu;                                                        \
+       for_each_possible_cpu(cpu)                                      \
+               _ret += *per_cpu_ptr(_p, cpu);                          \
+       _ret;                                                           \
+})
+
 static inline u64 percpu_u64_get(u64 __percpu *src)
 {
-       u64 ret = 0;
-       int cpu;
-
-       for_each_possible_cpu(cpu)
-               ret += *per_cpu_ptr(src, cpu);
-       return ret;
+       return per_cpu_sum(src);
 }
 
 static inline void percpu_u64_set(u64 __percpu *dst, u64 src)