From 8549cce11b878d2fbf814d5e27bcc5e626890e70 Mon Sep 17 00:00:00 2001
From: yiheng <wangyiheng@sangfor.com.cn>
Date: Thu, 13 Aug 2026 00:15:41 +0800
Subject: [PATCH] [BugFix] Fix race in c128 prefill plan kernel on ragged
 extend (#32467)

Signed-off-by: EanWang211123 <wangyiheng@sangfor.com.cn>
---
 python/sglang/kernels/jit/csrc/deepseek_v4/c_plan.cuh | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/python/sglang/kernels/jit/csrc/deepseek_v4/c_plan.cuh b/python/sglang/kernels/jit/csrc/deepseek_v4/c_plan.cuh
index 3675a6e39..7e7b1005e 100644
--- a/python/sglang/kernels/jit/csrc/deepseek_v4/c_plan.cuh
+++ b/python/sglang/kernels/jit/csrc/deepseek_v4/c_plan.cuh
@@ -154,11 +154,6 @@ __global__ __launch_bounds__(1024, 1)  //
     counter_c = 0;
     counter_w = 0;
   }
-  if (tx < kNumWarps) {
-    warp_max[tx] = 0;
-    warp_min[tx] = 0xFFFFFFFFu;
-  }
-
   // === Stage B: min/max(extend_len) for MTP-uniform detection ===
   // For min, treat threads outside `batch_size` as +inf so they don't pull the min down.
   const uint32_t e_for_max = static_cast<uint32_t>(extend_len);