[lvc-project] [PATCH 5.10 2/2] hugetlbfs: fix hugetlbfs_statfs() locking

[Artem Sadovnikov]

From: Mina Almasry <almasrymina at google.com>

Commit 4b25f030ae69 ("hugetlbfs: fix hugetlbfs_statfs() locking") upstream.

After commit db71ef79b59b ("hugetlb: make free_huge_page irq safe"), the
subpool lock should be locked with spin_lock_irq() and all call sites was
modified as such, except for the ones in hugetlbfs_statfs().

Link: https://lkml.kernel.org/r/20220429202207.3045-1-almasrymina@google.com
Fixes: db71ef79b59b ("hugetlb: make free_huge_page irq safe")
Signed-off-by: Mina Almasry <almasrymina at google.com>
Signed-off-by: Artem Sadovnikov <ancowi69 at gmail.com>
---
 fs/hugetlbfs/inode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index bf3cda498962..b6440007116e 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -1069,12 +1069,12 @@ static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 		if (sbinfo->spool) {
 			long free_pages;
 
-			spin_lock(&sbinfo->spool->lock);
+			spin_lock_irq(&sbinfo->spool->lock);
 			buf->f_blocks = sbinfo->spool->max_hpages;
 			free_pages = sbinfo->spool->max_hpages
 				- sbinfo->spool->used_hpages;
 			buf->f_bavail = buf->f_bfree = free_pages;
-			spin_unlock(&sbinfo->spool->lock);
+			spin_unlock_irq(&sbinfo->spool->lock);
 			buf->f_files = sbinfo->max_inodes;
 			buf->f_ffree = sbinfo->free_inodes;
 		}
-- 
2.34.1