From 771a41440f7df77e7ca1b23df23c970b0ae04602 Mon Sep 17 00:00:00 2001
From: sneaxiy <32832641+sneaxiy@users.noreply.github.com>
Date: Tue, 19 Apr 2022 10:15:37 +0800
Subject: [PATCH] fix ln (#41918)

---
 paddle/fluid/operators/layer_norm_kernel.cu.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/paddle/fluid/operators/layer_norm_kernel.cu.h b/paddle/fluid/operators/layer_norm_kernel.cu.h
index c0a4b88fc7..5b5ddddaaf 100644
--- a/paddle/fluid/operators/layer_norm_kernel.cu.h
+++ b/paddle/fluid/operators/layer_norm_kernel.cu.h
@@ -130,7 +130,9 @@ __forceinline__ __device__ U BlockReduceSum(U val, U *shared) {
                                             ##__VA_ARGS__)
 
 static __device__ __forceinline__ float real_sqrt(float x) { return sqrtf(x); }
-static __device__ __forceinline__ double real_sqrt(double x) { return sqrt(x); }
+static __device__ __forceinline__ double real_sqrt(double x) {
+  return ::sqrt(x);
+}
 
 template <typename T>
 struct PairForLayerNorm {
@@ -162,7 +164,7 @@ __inline__ __device__ float rsqrt_(const float val) {
 
 template <>
 __inline__ __device__ double rsqrt_(const double val) {
-  return rsqrt(val);
+  return ::rsqrt(val);
 }
 
 #if CUDA_ARCH_FP16_SUPPORTED(__CUDA_ARCH__)
-- 
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