linux-kernel - [PATCH] csky: Use the bitmap API to allocate bitmaps

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Message-Id: <07685c3184d2d9e3ee3b83e8f608e3a178cfabe3.1656961592.git.christophe.jaillet@wanadoo.fr>
Date:   Mon,  4 Jul 2022 21:06:46 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Guo Ren <guoren@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-csky@...r.kernel.org
Subject: [PATCH] csky: 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.

While at it, turn a bitmap_clear() into an equivalent bitmap_zero(). It is
also less verbose.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 arch/csky/mm/asid.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/csky/mm/asid.c b/arch/csky/mm/asid.c
index b2e914745c1d..7fb6c417bbac 100644
--- a/arch/csky/mm/asid.c
+++ b/arch/csky/mm/asid.c
@@ -27,7 +27,7 @@ static void flush_context(struct asid_info *info)
 	u64 asid;
 
 	/* Update the list of reserved ASIDs and the ASID bitmap. */
-	bitmap_clear(info->map, 0, NUM_CTXT_ASIDS(info));
+	bitmap_zero(info->map, NUM_CTXT_ASIDS(info));
 
 	for_each_possible_cpu(i) {
 		asid = atomic64_xchg_relaxed(&active_asid(info, i), 0);
@@ -178,8 +178,7 @@ int asid_allocator_init(struct asid_info *info,
 	 */
 	WARN_ON(NUM_CTXT_ASIDS(info) - 1 <= num_possible_cpus());
 	atomic64_set(&info->generation, ASID_FIRST_VERSION(info));
-	info->map = kcalloc(BITS_TO_LONGS(NUM_CTXT_ASIDS(info)),
-			    sizeof(*info->map), GFP_KERNEL);
+	info->map = bitmap_zalloc(NUM_CTXT_ASIDS(info), GFP_KERNEL);
 	if (!info->map)
 		return -ENOMEM;
 
-- 
2.34.1