[PATCH 1/2] cxl: Use the bitmap API to allocate bitmaps

[Christophe JAILLET]

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.jail...@wanadoo.fr>
---
 drivers/misc/cxl/context.c | 2 +-
 drivers/misc/cxl/guest.c   | 2 +-
 drivers/misc/cxl/irq.c     | 3 +--
 drivers/misc/cxl/of.c      | 5 ++---
 4 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index e627b4056623..acaa44809c58 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -331,7 +331,7 @@ static void reclaim_ctx(struct rcu_head *rcu)
                __free_page(ctx->ff_page);
        ctx->sstp = NULL;
 
-       kfree(ctx->irq_bitmap);
+       bitmap_free(ctx->irq_bitmap);
 
        /* Drop ref to the afu device taken during cxl_context_init */
        cxl_afu_put(ctx->afu);
diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c
index 3321c014913c..375f692ae9d6 100644
--- a/drivers/misc/cxl/guest.c
+++ b/drivers/misc/cxl/guest.c
@@ -1053,7 +1053,7 @@ static void free_adapter(struct cxl *adapter)
                if (adapter->guest->irq_avail) {
                        for (i = 0; i < adapter->guest->irq_nranges; i++) {
                                cur = &adapter->guest->irq_avail[i];
-                               kfree(cur->bitmap);
+                               bitmap_free(cur->bitmap);
                        }
                        kfree(adapter->guest->irq_avail);
                }
diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c
index 5f0e2dcebb34..0ce91d99aead 100644
--- a/drivers/misc/cxl/irq.c
+++ b/drivers/misc/cxl/irq.c
@@ -319,8 +319,7 @@ int afu_allocate_irqs(struct cxl_context *ctx, u32 count)
        }
 
        ctx->irq_count = count;
-       ctx->irq_bitmap = kcalloc(BITS_TO_LONGS(count),
-                                 sizeof(*ctx->irq_bitmap), GFP_KERNEL);
+       ctx->irq_bitmap = bitmap_zalloc(count, GFP_KERNEL);
        if (!ctx->irq_bitmap)
                goto out;
 
diff --git a/drivers/misc/cxl/of.c b/drivers/misc/cxl/of.c
index 1cfecba42d01..25ce725035e7 100644
--- a/drivers/misc/cxl/of.c
+++ b/drivers/misc/cxl/of.c
@@ -308,8 +308,7 @@ static int read_adapter_irq_config(struct cxl *adapter, 
struct device_node *np)
                cur = &adapter->guest->irq_avail[i];
                cur->offset = be32_to_cpu(ranges[i * 2]);
                cur->range  = be32_to_cpu(ranges[i * 2 + 1]);
-               cur->bitmap = kcalloc(BITS_TO_LONGS(cur->range),
-                               sizeof(*cur->bitmap), GFP_KERNEL);
+               cur->bitmap = bitmap_zalloc(cur->range, GFP_KERNEL);
                if (cur->bitmap == NULL)
                        goto err;
                if (cur->offset < adapter->guest->irq_base_offset)
@@ -326,7 +325,7 @@ static int read_adapter_irq_config(struct cxl *adapter, 
struct device_node *np)
 err:
        for (i--; i >= 0; i--) {
                cur = &adapter->guest->irq_avail[i];
-               kfree(cur->bitmap);
+               bitmap_free(cur->bitmap);
        }
        kfree(adapter->guest->irq_avail);
        adapter->guest->irq_avail = NULL;
-- 
2.34.1