linux-kernel - [PATCH v2 5/5] hugetlbfs: fix inaccurate comment in hugetlbfs

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Date:   Tue, 26 Jul 2022 22:29:18 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <mike.kravetz@...cle.com>,
        <songmuchun@...edance.com>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH v2 5/5] hugetlbfs: fix inaccurate comment in hugetlbfs_statfs()

In some cases, e.g. when size option is not specified, f_blocks, f_bavail
and f_bfree will be set to -1 instead of 0. Likewise, when nr_inodes isn't
specified, f_files and f_ffree will be set to -1 too. Update the comment
to make this clear.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 fs/hugetlbfs/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 96c60aa3ab47..fe0e374b02a3 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -1079,7 +1079,7 @@ static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_bsize = huge_page_size(h);
 	if (sbinfo) {
 		spin_lock(&sbinfo->stat_lock);
-		/* If no limits set, just report 0 for max/free/used
+		/* If no limits set, just report 0 or -1 for max/free/used
 		 * blocks, like simple_statfs() */
 		if (sbinfo->spool) {
 			long free_pages;
-- 
2.23.0