linux-kernel - [PATCH 2/4] IB/mthca: Use bitmap

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Message-Id: <f1bd33f6ea6c8ad519a222db6e9aa17c55610557.1637785902.git.christophe.jaillet@wanadoo.fr>
Date:   Wed, 24 Nov 2021 21:41:36 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     dledford@...hat.com, jgg@...pe.ca
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 2/4] IB/mthca: Use bitmap_set() when applicable

The 'alloc->table' bitmap has just been allocated, so this is safe to use
the faster and non-atomic 'bitmap_set()' function. There is no need to
hand-write it.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/infiniband/hw/mthca/mthca_allocator.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c
index 06fc8a2e0bd4..57fa1cc202bc 100644
--- a/drivers/infiniband/hw/mthca/mthca_allocator.c
+++ b/drivers/infiniband/hw/mthca/mthca_allocator.c
@@ -79,8 +79,6 @@ void mthca_free(struct mthca_alloc *alloc, u32 obj)
 int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask,
 		     u32 reserved)
 {
-	int i;
-
 	/* num must be a power of 2 */
 	if (num != 1 << (ffs(num) - 1))
 		return -EINVAL;
@@ -94,8 +92,7 @@ int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask,
 	if (!alloc->table)
 		return -ENOMEM;
 
-	for (i = 0; i < reserved; ++i)
-		set_bit(i, alloc->table);
+	bitmap_set(alloc->table, 0, reserved);
 
 	return 0;
 }
-- 
2.30.2