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INTERNAL_SYSCALL and function calls in arguments


sched_setaffinity has the following code:

INTERNAL_SYSCALL (sched_getaffinity, err, 3, getpid(), psize, p)

On AMD64, the INTERNAL_SYSCALL macro does not work if you make a
function call as argument. As result, the sched_getaffinity syscall
will always fail.

Is this a bug in the macro, or is the usage wrong at this place? As
far as I can see, this is the only place where we use such a


2004-04-09  Thorsten Kukuk  <>

	* sysdeps/unix/sysv/linux/sched_setaffinity.c: Don't pass function
	call as argument to INTERNAL_SYSCALL.

--- ./sysdeps/unix/sysv/linux/sched_setaffinity.c	29 Mar 2004 21:59:17 -0000	1.4
+++ ./sysdeps/unix/sysv/linux/sched_setaffinity.c	9 Apr 2004 07:11:15 -0000
@@ -40,8 +40,9 @@
       size_t psize = 128;
       void *p = alloca (psize);
+      pid_t mypid = getpid ();
-      while (res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, getpid (),
+      while (res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, mypid,
 				     psize, p),
 	     INTERNAL_SYSCALL_ERROR_P (res, err)
 	     && INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL)

Thorsten Kukuk
SuSE Linux AG        Maxfeldstr. 5                 D-90409 Nuernberg
Key fingerprint = A368 676B 5E1B 3E46 CFCE  2D97 F8FD 4E23 56C6 FB4B

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