linux-kernel - [PATCH] fs: judging context via current_is_kswapd instead of gfp

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Date:   Wed,  8 Dec 2021 16:37:38 +0800
From:   Huangzhaoyang <huangzhaoyang@...il.com>
To:     David Howells <dhowells@...hat.com>,
        Marc Dionne <marc.dionne@...istor.com>,
        Zhaoyang Huang <zhaoyang.huang@...soc.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] fs: judging context via current_is_kswapd instead of gfp_flag

From: Zhaoyang Huang <zhaoyang.huang@...soc.com>

Kswapd uses GFP_KERNEL as gfp_flag which make the judgment of
context is unexpected. fix it by using current_is_kswapd.

Signed-off-by: Zhaoyang Huang <zhaoyang.huang@...soc.com>
---
 fs/afs/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/file.c b/fs/afs/file.c
index eb11d04..6c199d5 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -485,7 +485,7 @@ static int afs_releasepage(struct page *page, gfp_t gfp_flags)
 	 * elected to wait */
 #ifdef CONFIG_AFS_FSCACHE
 	if (PageFsCache(page)) {
-		if (!(gfp_flags & __GFP_DIRECT_RECLAIM) || !(gfp_flags & __GFP_FS))
+		if (current_is_kswapd() || !(gfp_flags & __GFP_FS))
 			return false;
 		wait_on_page_fscache(page);
 	}
-- 
1.9.1