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);
}
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