linux-kernel - [PATCH 5.4 15/16] silence nfscache allocation warnings with kvzalloc

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Date:   Fri,  8 Oct 2021 13:28:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Rik van Riel <riel@...riel.com>,
        "J. Bruce Fields" <bfields@...hat.com>,
        Krzysztof Olędzki <ole@....pl>
Subject: [PATCH 5.4 15/16] silence nfscache allocation warnings with kvzalloc

From: Rik van Riel <riel@...riel.com>

commit 8c38b705b4f4ca4e7f9cc116141bc38391917c30 upstream.

silence nfscache allocation warnings with kvzalloc

Currently nfsd_reply_cache_init attempts hash table allocation through
kmalloc, and manually falls back to vzalloc if that fails. This makes
the code a little larger than needed, and creates a significant amount
of serial console spam if you have enough systems.

Switching to kvzalloc gets rid of the allocation warnings, and makes
the code a little cleaner too as a side effect.

Freeing of nn->drc_hashtbl is already done using kvfree currently.

Signed-off-by: Rik van Riel <riel@...riel.com>
Signed-off-by: J. Bruce Fields <bfields@...hat.com>
Cc: Krzysztof Olędzki <ole@....pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/nfsd/nfscache.c |   12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -173,14 +173,10 @@ int nfsd_reply_cache_init(struct nfsd_ne
 	if (status)
 		goto out_nomem;
 
-	nn->drc_hashtbl = kcalloc(hashsize,
-				sizeof(*nn->drc_hashtbl), GFP_KERNEL);
-	if (!nn->drc_hashtbl) {
-		nn->drc_hashtbl = vzalloc(array_size(hashsize,
-						 sizeof(*nn->drc_hashtbl)));
-		if (!nn->drc_hashtbl)
-			goto out_shrinker;
-	}
+	nn->drc_hashtbl = kvzalloc(array_size(hashsize,
+				sizeof(*nn->drc_hashtbl)), GFP_KERNEL);
+	if (!nn->drc_hashtbl)
+		goto out_shrinker;
 
 	for (i = 0; i < hashsize; i++) {
 		INIT_LIST_HEAD(&nn->drc_hashtbl[i].lru_head);