diff options
Diffstat (limited to 'sys/vm/vm_map.c')
| -rw-r--r-- | sys/vm/vm_map.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index b7f990962ff6..cbf9b0080bf8 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -2917,7 +2917,10 @@ vm_map_lookup_done(vm_map_t map, vm_map_entry_t entry) vm_map_unlock_read(map); } +#ifdef ENABLE_VFS_IOOPT /* + * Experimental support for zero-copy I/O + * * Implement uiomove with VM operations. This handles (and collateral changes) * support every combination of source object modification, and COW type * operations. @@ -3149,6 +3152,7 @@ vm_uiomove( } return 0; } +#endif /* * Performs the copy_on_write operations necessary to allow the virtual copies |