Re-export Ones()

It's used by the nvidia driver

Fixes: 1642adec3 ("dix: unexport Ones()")
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2051>

os/osdep.h

@@ -205,7 +205,7 @@ extern Bool NoListenAll;
 extern Bool AllowByteSwappedClients;
 
 #if __has_builtin(__builtin_popcountl)
-# define Ones __builtin_popcountl
+# define Xpopcountl __builtin_popcountl
 #else
 /*
  * Count the number of bits set to 1 in a 32-bit word.
@@ -213,7 +213,7 @@ extern Bool AllowByteSwappedClients;
  * https://dspace.mit.edu/handle/1721.1/6086
  */
 static inline int
-Ones(unsigned long mask)
+Xpopcountl(unsigned long mask)
 {
     unsigned long y;
 
@@ -222,5 +222,6 @@ Ones(unsigned long mask)
     return (((y + (y >> 3)) & 030707070707) % 077);
 }
 #endif
+#define Ones Xpopcountl
 
 #endif                          /* _OSDEP_H_ */

os/utils.c

@@ -1563,3 +1563,13 @@ AbortServer(void)
         OsAbort();
     exit(1);
 }
+
+/* Exported version for binary compatibility with modules which call it */
+#undef Ones
+_X_EXPORT int Ones(unsigned long);
+
+int
+Ones (unsigned long mask)
+{
+    return Xpopcountl(mask);
+}