[PATCH 2/4] iomap: simplify writepages reclaim guard

[Kefeng Wang <wangkefeng.wang@huawei.com>]

Now that kswapd can no longer reach filesystem writeback (pageout()
returns PAGE_ACTIVATE for non-shmem, non-anon folios), any PF_MEMALLOC
context in iomap_writepages() indicates a VM regression, simplify
the check by removing PF_KSWAPD.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 fs/iomap/buffered-io.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 0a5ebfda90f1..6306ca747f3b 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -2077,8 +2077,7 @@ iomap_writepages(struct iomap_writepage_ctx *wpc)
 	 * Writeback from reclaim context should never happen except in the case
 	 * of a VM regression so warn about it and refuse to write the data.
 	 */
-	if (WARN_ON_ONCE((current->flags & (PF_MEMALLOC | PF_KSWAPD)) ==
-			PF_MEMALLOC))
+	if (WARN_ON_ONCE((current->flags & PF_MEMALLOC)))
 		return -EIO;
 
 	while ((folio = writeback_iter(mapping, wpc->wbc, folio, &error))) {
-- 
2.55.0