X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fassembly%2Fx86-64%2Falloc.lisp;h=2c113b0332734232e87cd5a75a21bdf38007e95b;hb=a18894dbea4495b885e1747babf4e2593dfb705e;hp=ba27b1b4aff45ce6b6e36bf2579b713a3fc04a93;hpb=dabefb02a8df444fbc3c38d7043e201ae450040e;p=sbcl.git

diff --git a/src/assembly/x86-64/alloc.lisp b/src/assembly/x86-64/alloc.lisp
index ba27b1b..2c113b0 100644
--- a/src/assembly/x86-64/alloc.lisp
+++ b/src/assembly/x86-64/alloc.lisp
@@ -94,8 +94,7 @@
                (emit-label get-tls-index-lock)
                (inst mov target 1)
                (zeroize rax-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)
@@ -106,13 +105,14 @@
                (inst jmp :ne release-tls-index-lock)
                ;; Allocate a new tls-index.
                (load-symbol-value target *free-tls-index*)
-               (let ((error (generate-error-code nil tls-exhausted-error)))
+               (let ((error (generate-error-code nil 'tls-exhausted-error)))
                  (inst cmp target (fixnumize tls-size))
                  (inst jmp :ge error))
                (inst add (make-ea-for-symbol-value *free-tls-index*)
                      (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))