HelenOS sources

vfs_unmount      1253 uspace/lib/c/generic/vfs/vfs.c 	rc = vfs_unmount(mp);
vfs_unmount       117 uspace/lib/c/include/vfs/vfs.h extern errno_t vfs_unmount(int);
vfs_unmount       117 uspace/lib/posix/include/libc/vfs/vfs.h extern errno_t vfs_unmount(int);