From 53fee3e5edfb834b13fbf5284fbe474647935899 Mon Sep 17 00:00:00 2001
From: Niklas Cassel <niklas.cassel@wdc.com>
Date: Thu, 11 Nov 2021 01:03:28 +0000
Subject: [PATCH] util: add spdk_u64_is_pow2()

There already is a spdk_u32_is_pow2() function that handles uint32_t.
Add a spdk_u64_is_pow2() function that handles uint64_t.

Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Change-Id: Idc96680dbe280d1510aba94a6900eff64ccb4f03
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10179
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
---
 include/spdk/util.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/spdk/util.h b/include/spdk/util.h
index 916324bbd..40a71152b 100644
--- a/include/spdk/util.h
+++ b/include/spdk/util.h
@@ -110,6 +110,19 @@ spdk_u32_is_pow2(uint32_t x)
 	return (x & (x - 1)) == 0;
 }
 
+/**
+ * Check if a uint64_t is a power of 2.
+ */
+static inline bool
+spdk_u64_is_pow2(uint64_t x)
+{
+	if (x == 0) {
+		return false;
+	}
+
+	return (x & (x - 1)) == 0;
+}
+
 static inline uint64_t
 spdk_divide_round_up(uint64_t num, uint64_t divisor)
 {