From: Christoph Hellwig <hch@lst.de>
Date: Thu, 20 Mar 2025 07:52:14 +0000 (+0100)
Subject: xfs: mark xfs_buf_free as might_sleep()
X-Git-Tag: v6.15-rc3~40^2~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a1a56f541a8f634007de4bcb45aa3eaf803154a8;p=thirdparty%2Flinux.git

xfs: mark xfs_buf_free as might_sleep()

xfs_buf_free can call vunmap, which can sleep.  The vunmap path is an
unlikely one, so add might_sleep to ensure calling xfs_buf_free from
atomic context gets caught more easily.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
---

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 8e7f1b324b3be..1a2b3f06fa717 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -105,6 +105,7 @@ xfs_buf_free(
 {
 	unsigned int		size = BBTOB(bp->b_length);
 
+	might_sleep();
 	trace_xfs_buf_free(bp, _RET_IP_);
 
 	ASSERT(list_empty(&bp->b_lru));