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