X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fassembly%2Fx86%2Falloc.lisp;h=65cfdb066d6e0610c785d80bed9744e0123d8991;hb=95591ed483dbb8c0846c129953acac1554f28809;hp=030d00293fc58bc34891b83e6168d06a92390896;hpb=0bb093a109ec94a021e413bd0ae6ae7fdf54d774;p=sbcl.git

diff --git a/src/assembly/x86/alloc.lisp b/src/assembly/x86/alloc.lisp
index 030d002..65cfdb0 100644
--- a/src/assembly/x86/alloc.lisp
+++ b/src/assembly/x86/alloc.lisp
@@ -102,8 +102,7 @@
                (emit-label get-tls-index-lock)
                (inst mov target 1)
                (inst xor eax-tn eax-tn)
-               (inst lock)
-               (inst cmpxchg (make-ea-for-symbol-value *tls-index-lock*) target)
+               (inst cmpxchg (make-ea-for-symbol-value *tls-index-lock*) target :lock)
                (inst jmp :ne get-tls-index-lock)
                ;; The symbol is now in OTHER.
                (inst pop other)
@@ -121,6 +120,7 @@
                      (fixnumize 1))
                (storew target other symbol-tls-index-slot other-pointer-lowtag)
                (emit-label release-tls-index-lock)
+               ;; No need for barriers on x86/x86-64 on unlock.
                (store-symbol-value 0 *tls-index-lock*)
                ;; Restore OTHER.
                (inst pop other))