git: b918ee2ce485 - main - tmpfs: remove IFF macro

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=b918ee2ce4850253ddd884e39dabecd6e96bf474

commit b918ee2ce4850253ddd884e39dabecd6e96bf474
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2023-02-13 23:47:44 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2023-02-15 00:57:41 +0000

    tmpfs: remove IFF macro
    
    Requested by:   mjg
    Reviewed by:    markj
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D38576
---
 sys/fs/tmpfs/tmpfs.h      | 1 -
 sys/fs/tmpfs/tmpfs_subr.c | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/sys/fs/tmpfs/tmpfs.h b/sys/fs/tmpfs/tmpfs.h
index 70ed066ef0f5..eda1c3b12c24 100644
--- a/sys/fs/tmpfs/tmpfs.h
+++ b/sys/fs/tmpfs/tmpfs.h
@@ -516,7 +516,6 @@ tmpfs_update(struct vnode *vp)
  * Convenience macros to simplify some logical expressions.
  */
 #define IMPLIES(a, b) (!(a) || (b))
-#define IFF(a, b) (IMPLIES(a, b) && IMPLIES(b, a))
 
 /*
  * Checks that the directory entry pointed by 'de' matches the name 'name'
diff --git a/sys/fs/tmpfs/tmpfs_subr.c b/sys/fs/tmpfs/tmpfs_subr.c
index cfd4787fb712..351ca825f203 100644
--- a/sys/fs/tmpfs/tmpfs_subr.c
+++ b/sys/fs/tmpfs/tmpfs_subr.c
@@ -547,8 +547,8 @@ tmpfs_alloc_node(struct mount *mp, struct tmpfs_mount *tmp, enum vtype type,
 	 * allocated, this must be the request to do it. */
 	MPASS(IMPLIES(tmp->tm_root == NULL, parent == NULL && type == VDIR));
 
-	MPASS(IFF(type == VLNK, target != NULL));
-	MPASS(IFF(type == VBLK || type == VCHR, rdev != VNOVAL));
+	MPASS((type == VLNK) ^ (target == NULL));
+	MPASS((type == VBLK || type == VCHR) ^ (rdev == VNOVAL));
 
 	if (tmp->tm_nodes_inuse >= tmp->tm_nodes_max)
 		return (ENOSPC);