Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20180615' into staging

TCG patch queue:

Workaround macos assembler lossage.
Eliminate tb_lock.
Fix TB code generation overflow.

# gpg: Signature made Fri 15 Jun 2018 20:40:56 BST
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20180615:
  tcg: Reduce max TB opcode count
  tcg: remove tb_lock
  translate-all: remove tb_lock mention from cpu_restore_state_from_tb
  cputlb: remove tb_lock from tlb_flush functions
  translate-all: protect TB jumps with a per-destination-TB lock
  translate-all: discard TB when tb_link_page returns an existing matching TB
  translate-all: introduce assert_no_pages_locked
  translate-all: add page_locked assertions
  translate-all: use per-page locking in !user-mode
  translate-all: move tb_invalidate_phys_page_range up in the file
  translate-all: work page-by-page in tb_invalidate_phys_range_1
  translate-all: remove hole in PageDesc
  translate-all: make l1_map lockless
  translate-all: iterate over TBs in a page with PAGE_FOR_EACH_TB
  tcg: move tb_ctx.tb_phys_invalidate_count to tcg_ctx
  tcg: track TBs with per-region BST's
  qht: return existing entry when qht_insert fails
  qht: require a default comparison function
  tcg/i386: Use byte form of xgetbv instruction

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 0 insertions, 3 deletions

diff --git a/linux-user/main.c b/linux-user/main.c
index 78d6d3e7eb..84e9ec9335 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -120,7 +120,6 @@ void fork_start(void)
 {
     start_exclusive();
     mmap_fork_start();
-    qemu_mutex_lock(&tb_ctx.tb_lock);
     cpu_list_lock();
 }
 
@@ -136,14 +135,12 @@ void fork_end(int child)
                 QTAILQ_REMOVE(&cpus, cpu, node);
             }
         }
-        qemu_mutex_init(&tb_ctx.tb_lock);
         qemu_init_cpu_list();
         gdbserver_fork(thread_cpu);
         /* qemu_init_cpu_list() takes care of reinitializing the
          * exclusive state, so we don't need to end_exclusive() here.
          */
     } else {
-        qemu_mutex_unlock(&tb_ctx.tb_lock);
         cpu_list_unlock();
         end_exclusive();
     }