KVM: PPC: Book3S HV: 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@wanadoo.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/52e843a460bc374973149b8da0bd04f9761b80b7.1657382184.git.christophe.jaillet@wanadoo.fr

diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c
index e2f11f9c3f2aa691bd4b1a130d06d38d989ecc5c..1d67baa5557a2ddd0c80e09ad8186fb7f0c2dea8 100644 (file)
--- a/arch/powerpc/kvm/book3s_hv_uvmem.c
+++ b/arch/powerpc/kvm/book3s_hv_uvmem.c
@@ -1190,8 +1190,7 @@ int kvmppc_uvmem_init(void)
 
        pfn_first = res->start >> PAGE_SHIFT;
        pfn_last = pfn_first + (resource_size(res) >> PAGE_SHIFT);
-       kvmppc_uvmem_bitmap = kcalloc(BITS_TO_LONGS(pfn_last - pfn_first),
-                                     sizeof(unsigned long), GFP_KERNEL);
+       kvmppc_uvmem_bitmap = bitmap_zalloc(pfn_last - pfn_first, GFP_KERNEL);
        if (!kvmppc_uvmem_bitmap) {
                ret = -ENOMEM;
                goto out_unmap;
@@ -1215,5 +1214,5 @@ void kvmppc_uvmem_free(void)
        memunmap_pages(&kvmppc_uvmem_pgmap);
        release_mem_region(kvmppc_uvmem_pgmap.range.start,
                           range_len(&kvmppc_uvmem_pgmap.range));
-       kfree(kvmppc_uvmem_bitmap);
+       bitmap_free(kvmppc_uvmem_bitmap);
 }