The patch titled
Subject: hugetlbfs: fix hugetlbfs_statfs() locking
has been added to the -mm mm-unstable branch. Its filename is
hugetlbfs-fix-hugetlbfs_statfs-locking.patch
This patch should soon appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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From: Mina Almasry <almasrymina@xxxxxxxxxx>
Subject: hugetlbfs: fix hugetlbfs_statfs() locking
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@xxxxxxxxxx
Fixes: db71ef79b59b ("hugetlb: make free_huge_page irq safe")
Signed-off-by: Mina Almasry <almasrymina@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/hugetlbfs/inode.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/hugetlbfs/inode.c~hugetlbfs-fix-hugetlbfs_statfs-locking
+++ a/fs/hugetlbfs/inode.c
@@ -1051,12 +1051,12 @@ static int hugetlbfs_statfs(struct dentr
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;
}
_
Patches currently in -mm which might be from almasrymina@xxxxxxxxxx are
hugetlbfs-fix-hugetlbfs_statfs-locking.patch
