[BugFix] Fix missing symbol triggering FA2 fallback on Hopper (#29107)

Signed-off-by: Lucas Wilkinson <[email protected]>

Author: LucasWilkinson

cmake/external_projects/vllm_flash_attn.cmake

@@ -38,7 +38,7 @@ else()
   FetchContent_Declare(
           vllm-flash-attn
           GIT_REPOSITORY https://github.com/vllm-project/flash-attention.git
-          GIT_TAG 71bb26f6295449be880344b93b51791cc009237d
+          GIT_TAG 86f8f157cf82aa2342743752b97788922dd7de43
           GIT_PROGRESS TRUE
           # Don't share the vllm-flash-attn build between build types
           BINARY_DIR ${CMAKE_BINARY_DIR}/vllm-flash-attn