Eliminate the overhead of gratuitous repeated reinitialization of cap_rights

- Add macros to allow preinitialization of cap_rights_t.

- Convert most commonly used code paths to use preinitialized cap_rights_t.
  A 3.6% speedup in fstat was measured with this change.

Reported by:	mjg
Reviewed by:	oshogbo
Approved by:	sbruno
MFC after:	1 month

1 files changed, 1 insertions, 2 deletions

diff --git a/sys/fs/fuse/fuse_vfsops.c b/sys/fs/fuse/fuse_vfsops.c
index 700d4450c2e7..0be6185e558e 100644
--- a/sys/fs/fuse/fuse_vfsops.c
+++ b/sys/fs/fuse/fuse_vfsops.c
@@ -222,7 +222,6 @@ fuse_vfsop_mount(struct mount *mp)
 	struct file *fp, *fptmp;
 	char *fspec, *subtype;
 	struct vfsoptlist *opts;
-	cap_rights_t rights;
 
 	subtype = NULL;
 	max_read_set = 0;
@@ -292,7 +291,7 @@ fuse_vfsop_mount(struct mount *mp)
 
 	FS_DEBUG2G("mntopts 0x%jx\n", (uintmax_t)mntopts);
 
-	err = fget(td, fd, cap_rights_init(&rights, CAP_READ), &fp);
+	err = fget(td, fd, &cap_read_rights, &fp);
 	if (err != 0) {
 		FS_DEBUG("invalid or not opened device: data=%p\n", data);
 		goto out;