git: e6bc80a3dedc - stable/13 - tmpfs: remove IFF macro

The branch stable/13 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=e6bc80a3dedce1a45357880963695dc74bdc63cf

commit e6bc80a3dedce1a45357880963695dc74bdc63cf
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2023-02-13 23:47:44 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2023-02-19 05:16:25 +0000

    tmpfs: remove IFF macro
    
    (cherry picked from commit b918ee2ce4850253ddd884e39dabecd6e96bf474)
---
 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 30c80ad70d48..e7928d4bf9dd 100644
--- a/sys/fs/tmpfs/tmpfs.h
+++ b/sys/fs/tmpfs/tmpfs.h
@@ -490,7 +490,6 @@ 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 351530a56698..bc9e1f08391b 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);