linux-kernel - [PATCH] mtd: nand: bbt: Use the bitmap API to allocate bitmaps

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Date:   Sun,  3 Jul 2022 18:09:45 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-mtd@...ts.infradead.org
Subject: [PATCH] mtd: nand: bbt: Use the bitmap API to allocate bitmaps

Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.

It is less verbose and it improves the semantic.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/mtd/nand/bbt.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/bbt.c b/drivers/mtd/nand/bbt.c
index 64af6898131d..db4f93a903e4 100644
--- a/drivers/mtd/nand/bbt.c
+++ b/drivers/mtd/nand/bbt.c
@@ -24,11 +24,8 @@ int nanddev_bbt_init(struct nand_device *nand)
 {
 	unsigned int bits_per_block = fls(NAND_BBT_BLOCK_NUM_STATUS);
 	unsigned int nblocks = nanddev_neraseblocks(nand);
-	unsigned int nwords = DIV_ROUND_UP(nblocks * bits_per_block,
-					   BITS_PER_LONG);
 
-	nand->bbt.cache = kcalloc(nwords, sizeof(*nand->bbt.cache),
-				  GFP_KERNEL);
+	nand->bbt.cache = bitmap_zalloc(nblocks * bits_per_block, GFP_KERNEL);
 	if (!nand->bbt.cache)
 		return -ENOMEM;
 
@@ -44,7 +41,7 @@ EXPORT_SYMBOL_GPL(nanddev_bbt_init);
  */
 void nanddev_bbt_cleanup(struct nand_device *nand)
 {
-	kfree(nand->bbt.cache);
+	bitmap_free(nand->bbt.cache);
 }
 EXPORT_SYMBOL_GPL(nanddev_bbt_cleanup);
 
-- 
2.34.1