Merge tag 'v6.2' into iommufd.git for-next

Resolve conflicts from the signature change in iommu_map:

 - drivers/infiniband/hw/usnic/usnic_uiom.c
   Switch iommu_map_atomic() to iommu_map(.., GFP_ATOMIC)

 - drivers/vfio/vfio_iommu_type1.c
   Following indenting change for GFP_KERNEL

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index f35e2cee5265..ddeaccc04aec 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1853,12 +1853,20 @@ xfs_inodegc_worker(
 						struct xfs_inodegc, work);
 	struct llist_node	*node = llist_del_all(&gc->list);
 	struct xfs_inode	*ip, *n;
+	unsigned int		nofs_flag;
 
 	WRITE_ONCE(gc->items, 0);
 
 	if (!node)
 		return;
 
+	/*
+	 * We can allocate memory here while doing writeback on behalf of
+	 * memory reclaim.  To avoid memory allocation deadlocks set the
+	 * task-wide nofs context for the following operations.
+	 */
+	nofs_flag = memalloc_nofs_save();
+
 	ip = llist_entry(node, struct xfs_inode, i_gclist);
 	trace_xfs_inodegc_worker(ip->i_mount, READ_ONCE(gc->shrinker_hits));
 
@@ -1867,6 +1875,8 @@ xfs_inodegc_worker(
 		xfs_iflags_set(ip, XFS_INACTIVATING);
 		xfs_inodegc_inactivate(ip);
 	}
+
+	memalloc_nofs_restore(nofs_flag);
 }
 
 /*