From bc77939ada60c2bfbdb42f9ed93df8b9fbfd3689 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@scylladb.com>
Date: Thu, 3 Sep 2020 15:56:12 +0300
Subject: [PATCH] Update seastar submodule

* seastar 7f7cf0f232...4ff91c4c3a (47):
  > core/reactor: complete_timers(): restore previous scheduling group
Fixes #7117.
  > future: Drop spurious 'mutable' from a lambda
  > future: Don't put a std::tuple in future_state
  > future: Prepare for changing the future_state storage type
  > future: Add future_state::get0()
  > when_all: Replace another untuple with get0
  > when_all: Use get0 instead of untuple
  > rpc: Don't assume that a future stores a std::tuple
  > future: Add a futurize_base
  > testing: Stop boost from installing its own signal handler
  > future: Define futurize::value_type with future::value_type
  > future: Move futurize down the file
  > Merge "Put logging onto {fmt} rails" from Pavel E
  > Merge "Make future_state non variadic" from Rafael
  > sharded: propagate sharded instances stop error
  > log: Fix misprint in docs
  > future: Use destroy_at in destructor
  > future: Add static_assert rejecting variadic future_state
  > futures_test: Drop variadic test
  > when_all: Drop a superfluous use of futurize::from_tuples
  > everywhere: Use future::get0 when appropriate
  > net: upgrade sockopt comments to doxygen
  > iostream: document the read_exactly() function
  > net:tls: fix clang-10 compilation duration cast
  > future: Move continuation_base_from_future to future.hh
  > repeat: Drop unnecessary make_tuple
  > shared_future: Don't use future_state_type
  > future: Add a static_assert against variadic futures
  > future: Delete warn_variadic_future
  > rpc_demo: Don't use a variadic future
  > rpc_test: Don't use a variadic future
  > futures_test: Don't use a variadic future
  > future: Move disable_failure_guard to promise::schedule
  > net: add an interface for custom socket options
  > posix: add one more setsockopt overload
  > Merge "Simplify pollfn and its inheritants" from Pavel E
  > util:std-compat.hh: add forward declaration of std::pmr for clang-10
  > rpc: Add protocol::has_handlers() helper
  > Add a Seastar_DEBUG_ALLOCATIONS build option
  > futures_test: Add a test for futures of references
  > future: Simplify destruction of future_state
  > Use detect_stack_use_after_return=1
  > repeat: Fix indentation
  > repeat: Delete try/catch
  > repeat: Simplify loop
  > Avoid call to std::exception_ptr's destructor from a .hh
  > file: Add missing include
---
 seastar | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/seastar b/seastar
index 7f7cf0f232..4ff91c4c3a 160000
--- a/seastar
+++ b/seastar
@@ -1 +1 @@
-Subproject commit 7f7cf0f232c6ce9e29e218100e2e44592bbc4606
+Subproject commit 4ff91c4c3a48e6582f869ae58ff83084d1bda483