svn commit: r313688 - head/sys/kern

[Konstantin Belousov]

Author: kib
Date: Sun Feb 12 20:54:31 2017
New Revision: 313688
URL: https://svnweb.freebsd.org/changeset/base/313688

Log:
  Switch copyout_map() to use vm_mmap_object() instead of vm_mmap().
  
  This is both a microoptimization and a move of the consumer to more
  commonly used vm function.
  
  Suggested and reviewed by:	alc
  Sponsored by:	The FreeBSD Foundation
  MFC after:	2 weeks

Modified:
  head/sys/kern/subr_uio.c

Modified: head/sys/kern/subr_uio.c
==============================================================================
--- head/sys/kern/subr_uio.c	Sun Feb 12 19:45:30 2017	(r313687)
+++ head/sys/kern/subr_uio.c	Sun Feb 12 20:54:31 2017	(r313688)
@@ -468,10 +468,11 @@ copyout_map(struct thread *td, vm_offset
 
 	/* round size up to page boundary */
 	size = (vm_size_t)round_page(sz);
-
-	error = vm_mmap(&vms->vm_map, addr, size, VM_PROT_READ | VM_PROT_WRITE,
-	    VM_PROT_ALL, MAP_PRIVATE | MAP_ANON, OBJT_DEFAULT, NULL, 0);
-
+	if (size == 0)
+		return (EINVAL);
+	error = vm_mmap_object(&vms->vm_map, addr, size, VM_PROT_READ |
+	    VM_PROT_WRITE, VM_PROT_ALL, MAP_PRIVATE | MAP_ANON, NULL, 0,
+	    FALSE, td);
 	return (error);
 }