git: f931f0d64247 - stable/13 - Fix unused variable warning in if_re_netmap.h

The branch stable/13 has been updated by dim:

URL: https://cgit.FreeBSD.org/src/commit/?id=f931f0d642476488fad72501969d49460a9a193b

commit f931f0d642476488fad72501969d49460a9a193b
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2022-07-21 19:52:29 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2022-07-24 11:00:10 +0000

    Fix unused variable warning in if_re_netmap.h
    
    With clang 15, the following -Werror warning is produced:
    
        sys/dev/netmap/if_re_netmap.h:179:8: error: variable 'n' set but not used [-Werror,-Wunused-but-set-variable]
                u_int n;
                      ^
    
    The 'n' variable appears to have been a debugging aid that has never
    been used for anything, so remove it.
    
    MFC after:      3 days
    
    (cherry picked from commit 8bfedf5852bcb846bfdd2a54989d65cdbb16f7ef)
---
 sys/dev/netmap/if_re_netmap.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sys/dev/netmap/if_re_netmap.h b/sys/dev/netmap/if_re_netmap.h
index 0e56a731ac6a..7c356ab4bd22 100644
--- a/sys/dev/netmap/if_re_netmap.h
+++ b/sys/dev/netmap/if_re_netmap.h
@@ -176,7 +176,6 @@ re_netmap_rxsync(struct netmap_kring *kring, int flags)
 	struct netmap_ring *ring = kring->ring;
 	u_int nm_i;	/* index into the netmap ring */
 	u_int nic_i;	/* index into the NIC ring */
-	u_int n;
 	u_int const lim = kring->nkr_num_slots - 1;
 	u_int const head = kring->rhead;
 	int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
@@ -236,7 +235,7 @@ re_netmap_rxsync(struct netmap_kring *kring, int flags)
 	nm_i = kring->nr_hwcur;
 	if (nm_i != head) {
 		nic_i = netmap_idx_k2n(kring, nm_i);
-		for (n = 0; nm_i != head; n++) {
+		while (nm_i != head) {
 			struct netmap_slot *slot = &ring->slot[nm_i];
 			uint64_t paddr;
 			void *addr = PNMB(na, slot, &paddr);