linux-kernel - [PATCH] coresight: Use devm_bitmap

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Message-Id: <e5fe23370794e2f5442e11e7f8455ddb06e4b10a.1635016943.git.christophe.jaillet@wanadoo.fr>
Date:   Sat, 23 Oct 2021 21:24:22 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     mathieu.poirier@...aro.org, suzuki.poulose@....com,
        mike.leach@...aro.org, leo.yan@...aro.org,
        alexander.shishkin@...ux.intel.com, mcoquelin.stm32@...il.com,
        alexandre.torgue@...s.st.com
Cc:     coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] coresight: Use devm_bitmap_zalloc when applicable

'drvdata->chs.guaranteed' is a bitmap. So use 'devm_bitmap_kzalloc()' to
simplify code, improve the semantic and avoid some open-coded arithmetic
in allocator arguments.

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

diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index 58062a5a8238..db9eada24275 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -862,7 +862,6 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
 	struct stm_drvdata *drvdata;
 	struct resource *res = &adev->res;
 	struct resource ch_res;
-	size_t bitmap_size;
 	struct coresight_desc desc = { 0 };
 
 	desc.name = coresight_alloc_device_name(&stm_devs, dev);
@@ -904,9 +903,7 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
 	else
 		drvdata->numsp = stm_num_stimulus_port(drvdata);
 
-	bitmap_size = BITS_TO_LONGS(drvdata->numsp) * sizeof(long);
-
-	guaranteed = devm_kzalloc(dev, bitmap_size, GFP_KERNEL);
+	guaranteed = devm_bitmap_zalloc(dev, drvdata->numsp, GFP_KERNEL);
 	if (!guaranteed)
 		return -ENOMEM;
 	drvdata->chs.guaranteed = guaranteed;
-- 
2.30.2