PERFORCE change 103135 for review
John Birrell
jb at FreeBSD.org
Thu Aug 3 20:41:17 UTC 2006
http://perforce.freebsd.org/chv.cgi?CH=103135
Change 103135 by jb at jb_freebsd2 on 2006/08/03 20:40:32
Catch up on the MPSAFE changes to -current.
Another reason for merging sun4v into current.
Affected files ...
.. //depot/projects/dtrace/src/sys/sun4v/sun4v/trap.c#6 edit
Differences ...
==== //depot/projects/dtrace/src/sys/sun4v/sun4v/trap.c#6 (text+ko) ====
@@ -629,7 +629,7 @@
else
callp = &p->p_sysent->sv_table[code];
- narg = callp->sy_narg & SYF_ARGMASK;
+ narg = callp->sy_narg;
if (narg <= regcnt) {
argp = &tf->tf_out[reg];
@@ -647,13 +647,6 @@
CTR5(KTR_SYSC, "syscall: td=%p %s(%#lx, %#lx, %#lx)", td,
syscallnames[code], argp[0], argp[1], argp[2]);
- /*
- * Try to run the syscall without the MP lock if the syscall
- * is MP safe.
- */
- if ((callp->sy_narg & SYF_MPSAFE) == 0)
- mtx_lock(&Giant);
-
#ifdef KTRACE
if (KTRPOINT(td, KTR_SYSCALL))
ktrsyscall(code, narg, argp);
@@ -733,13 +726,6 @@
}
/*
- * Release Giant if we had to get it. Don't use mtx_owned(),
- * we want to catch broken syscalls.
- */
- if ((callp->sy_narg & SYF_MPSAFE) == 0)
- mtx_unlock(&Giant);
-
- /*
* Handle reschedule and other end-of-syscall issues
*/
userret(td, tf);
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