-Wunused-const-variable in drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c

[nhukc]

drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c:365:1: warning: unused variable 'mvpp2_dbgfs_prs_pmap_fops' [-Wunused-const-variable]
DEFINE_SHOW_ATTRIBUTE(mvpp2_dbgfs_prs_pmap);
^

Introduced in 21da57a. This file is for dumping useful debugging information to userspace. The functionality of pmap dumping exists, but is unused.

static int mvpp2_dbgfs_prs_pmap_show(struct seq_file *s, void *unused)
{
	struct mvpp2_dbgfs_prs_entry *entry = s->private;
	struct mvpp2_prs_entry pe;
	unsigned int pmap;

	mvpp2_prs_init_from_hw(entry->priv, &pe, entry->tid);

	pmap = mvpp2_prs_tcam_port_map_get(&pe);
	pmap &= MVPP2_PRS_PORT_MASK;

	seq_printf(s, "%02x\n", pmap);

	return 0;
}

	/* Create each attr */
	debugfs_create_file("sram", 0444, prs_entry_dir, entry,
			    &mvpp2_dbgfs_prs_sram_fops);

	debugfs_create_file("valid", 0644, prs_entry_dir, entry,
			    &mvpp2_dbgfs_prs_valid_fops);

	debugfs_create_file("lookup_id", 0644, prs_entry_dir, entry,
			    &mvpp2_dbgfs_prs_lu_fops);

	debugfs_create_file("ai", 0644, prs_entry_dir, entry,
			    &mvpp2_dbgfs_prs_ai_fops);

	debugfs_create_file("header_data", 0644, prs_entry_dir, entry,
			    &mvpp2_dbgfs_prs_hdata_fops);

	debugfs_create_file("hits", 0444, prs_entry_dir, entry,
			    &mvpp2_dbgfs_prs_hits_fops);

[nhukc]

Reached out to author+maintainers https://groups.google.com/forum/#!topic/clang-built-linux/ydA_FRyvZ14

[nickdesaulniers]

accepted: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=8110a7a7d295b08433dfa7e692e347a43e63f475