From 8e25a3077a790708a4543989657c5e7d5bc24ecb Mon Sep 17 00:00:00 2001
From: Karunakar Dasineni <karuna@codeaurora.org>
Date: Thu, 24 Oct 2019 14:13:19 -0700
Subject: [PATCH] qcacmn: Add qdf API to find last set bit

Add qdf wrapper for Linux fls() to find last set bit.

Change-Id: I089fee397d619515c768521bda1f4d4c35526fe0
---
 qdf/inc/qdf_util.h         | 13 +++++++++++++
 qdf/linux/src/i_qdf_util.h | 13 +++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/qdf/inc/qdf_util.h b/qdf/inc/qdf_util.h
index ec990c505c..a89e48dc99 100644
--- a/qdf/inc/qdf_util.h
+++ b/qdf/inc/qdf_util.h
@@ -761,4 +761,17 @@ int qdf_hex_str_to_binary(u8 *dst, const char *src, size_t count)
 	return __qdf_hex_str_to_binary(dst, src, count);
 }
 
+/**
+ * qdf_fls() - find last set bit in a given 32 bit input
+ * @x: 32 bit mask
+ *
+ * Return: zero if the input is zero, otherwise returns the bit
+ * position of the last set bit, where the LSB is 1 and MSB is 32.
+ */
+static inline
+int qdf_fls(uint32_t x)
+{
+	return __qdf_fls(x);
+}
+
 #endif /*_QDF_UTIL_H*/
diff --git a/qdf/linux/src/i_qdf_util.h b/qdf/linux/src/i_qdf_util.h
index 469320e6e0..67469c355e 100644
--- a/qdf/linux/src/i_qdf_util.h
+++ b/qdf/linux/src/i_qdf_util.h
@@ -472,4 +472,17 @@ int __qdf_hex_str_to_binary(u8 *dst, const char *src, size_t count)
 	return hex2bin(dst, src, count);
 }
 
+/**
+ * __qdf_fls() - find last set bit in a given 32 bit input
+ * @x: 32 bit mask
+ *
+ * Return: zero if the input is zero, otherwise returns the bit
+ * position of the last set bit, where the LSB is 1 and MSB is 32.
+ */
+static inline
+int __qdf_fls(uint32_t x)
+{
+	return fls(x);
+}
+
 #endif /*_I_QDF_UTIL_H*/