2002-12-12 Roland McGrath <roland@redhat.com>

	* sysdeps/unix/sysv/linux/i386/lowlevellock.h: Use asm operand with
	"m" constraint to refer to __libc_locking_needed.  Declare it here.

diff --git a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h
index 470dcf61086bb2d7f4e9d15bf22fbd568131f357..94c0314c12e5fb15733a986c1642d2aa976da10b 100644 (file)
--- a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h
@@ -183,21 +183,25 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
 
    XXX In future we might even want to avoid it on UP machines.  */
 
+/* Nonzero if locking is needed.  */
+extern int __libc_locking_needed attribute_hidden;
+
 # define lll_trylock(futex) \
   ({ unsigned char ret;                                                              \
-     __asm __volatile ("cmpl $0, __libc_locking_needed\n\t"                  \
+     __asm __volatile ("cmpl $0, %5\n\t"                                     \
                       "je,pt 0f\n\t"                                         \
                       "lock\n"                                               \
                       "0:\tcmpxchgl %2, %1; setne %0"                        \
                       : "=a" (ret), "=m" (futex)                             \
-                      : "r" (0), "1" (futex), "0" (1)                        \
+                      : "r" (0), "1" (futex), "0" (1),                       \
+                        "m" (__libc_locking_needed)                          \
                       : "memory");                                           \
      ret; })
 
 
 # define lll_lock(futex) \
   (void) ({ int ignore1, ignore2;                                            \
-           __asm __volatile ("cmpl $0, __libc_locking_needed\n\t"            \
+           __asm __volatile ("cmpl $0, %5\n\t"                               \
                              "je,pt 0f\n\t"                                  \
                              "lock\n"                                        \
                              "0:\txaddl %0, %2\n\t"                          \
@@ -209,13 +213,14 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
                              ".previous\n"                                   \
                              "2:"                                            \
                              : "=a" (ignore1), "=&c" (ignore2), "=m" (futex) \
-                             : "0" (-1), "2" (futex)                         \
+                             : "0" (-1), "2" (futex),                        \
+                               "m" (__libc_locking_needed)                   \
                              : "memory"); })
 
 
 # define lll_unlock(futex) \
   (void) ({ int ignore;                                                              \
-            __asm __volatile ("cmpl $0, __libc_locking_needed\n\t"           \
+            __asm __volatile ("cmpl $0, %3\n\t"                                      \
                              "je,pt 0f\n\t"                                  \
                              "lock\n"                                        \
                              "0:\tincl %0\n\t"                               \
@@ -227,7 +232,7 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
                              ".previous\n"                                   \
                              "2:"                                            \
                              : "=m" (futex), "=&a" (ignore)                  \
-                             : "0" (futex)                                   \
+                             : "0" (futex), "m" (__libc_locking_needed)      \
                              : "memory"); })
 #endif