Commit a7694ff1 authored by Al Viro's avatar Al Viro Committed by Greg Kroah-Hartman
Browse files

vmscan: don't bother with debugfs_real_fops() 



... not when it's used only to check which file is used;
debugfs_create_file_aux_num() allows to stash a number into
debugfs entry and debugfs_get_aux_num() extracts it.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Braino-spotted-by: default avatarMatthew Wilcox <willy@infradead.org>
Link: https://lore.kernel.org/r/20250702211739.GE3406663@ZenIV


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 460e36ee

mm/vmscan.c

+5 −3
Original line number Diff line number Diff line
@@ -5420,7 +5420,7 @@ static void lru_gen_seq_show_full(struct seq_file *m, struct lruvec *lruvec, 
static int lru_gen_seq_show(struct seq_file *m, void *v)

{

	unsigned long seq;

	bool full = !debugfs_real_fops(m->file)->write;

	bool full = debugfs_get_aux_num(m->file);

	struct lruvec *lruvec = v;

	struct lru_gen_folio *lrugen = &lruvec->lrugen;

	int nid = lruvec_pgdat(lruvec)->node_id;
@@ -5756,8 +5756,10 @@ static int __init init_lru_gen(void) 
	if (sysfs_create_group(mm_kobj, &lru_gen_attr_group))

		pr_err("lru_gen: failed to create sysfs group\n");



	debugfs_create_file("lru_gen", 0644, NULL, NULL, &lru_gen_rw_fops);

	debugfs_create_file("lru_gen_full", 0444, NULL, NULL, &lru_gen_ro_fops);

	debugfs_create_file_aux_num("lru_gen", 0644, NULL, NULL, 1,

				    &lru_gen_rw_fops);

	debugfs_create_file_aux_num("lru_gen_full", 0444, NULL, NULL, 0,

				    &lru_gen_ro_fops);



	return 0;

};