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From: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Date: Tue, 23 Jan 2024 01:43:42 -0800
Subject: [PATCH 1/5] zonefs: pass GFP_KERNEL to blkdev_zone_mgmt() call
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Message-Id: <20240123-zonefs_nofs-v1-1-cc0b0308ef25@wdc.com>
References: <20240123-zonefs_nofs-v1-0-cc0b0308ef25@wdc.com>
In-Reply-To: <20240123-zonefs_nofs-v1-0-cc0b0308ef25@wdc.com>
To: Damien Le Moal <dlemoal@kernel.org>, 
 Naohiro Aota <naohiro.aota@wdc.com>, Mike Snitzer <snitzer@kernel.org>, 
 dm-devel@lists.linux.dev, Chris Mason <clm@fb.com>, 
 Josef Bacik <josef@toxicpanda.com>, David Sterba <dsterba@suse.com>, 
 Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <chao@kernel.org>, 
 Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>, 
 Sagi Grimberg <sagi@grimberg.me>, Chaitanya Kulkarni <kch@nvidia.com>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, 
 linux-btrfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, 
 linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, 
 Johannes Thumshirn <johannes.thumshirn@wdc.com>, 
 "Matthew Wilcox (Oracle)" <willy@infradead.org>

Pass GFP_KERNEL instead of GFP_NOFS to the blkdev_zone_mgmt() call in
zonefs_zone_mgmt().

As as zonefs_zone_mgmt() and zonefs_inode_zone_mgmt() are never called
from a place that can recurse back into the filesystem on memory reclaim,
it is save to call blkdev_zone_mgmt() with GFP_KERNEL.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 fs/zonefs/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 93971742613a..63fbac018c04 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -113,7 +113,7 @@ static int zonefs_zone_mgmt(struct super_block *sb,
 
 	trace_zonefs_zone_mgmt(sb, z, op);
 	ret = blkdev_zone_mgmt(sb->s_bdev, op, z->z_sector,
-			       z->z_size >> SECTOR_SHIFT, GFP_NOFS);
+			       z->z_size >> SECTOR_SHIFT, GFP_KERNEL);
 	if (ret) {
 		zonefs_err(sb,
 			   "Zone management operation %s at %llu failed %d\n",

-- 
2.43.0