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Date: Sat, 23 Oct 2021 21:49:42 +0200 From: Christophe JAILLET <christophe.jaillet@...adoo.fr> To: dwmw2@...radead.org, baolu.lu@...ux.intel.com, joro@...tes.org, will@...nel.org Cc: iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org, Christophe JAILLET <christophe.jaillet@...adoo.fr> Subject: [PATCH] iommu/vt-d: Use bitmap_zalloc() when applicable 'iommu->domain_ids' is a bitmap. So use 'bitmap_zalloc()' to simplify code and improve the semantic. Also change the corresponding 'kfree()' into 'bitmap_free()' to keep consistency. Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr> --- drivers/iommu/intel/iommu.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 0bde0c8b4126..2ae75b7f7dec 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -1880,17 +1880,16 @@ static void iommu_disable_translation(struct intel_iommu *iommu) static int iommu_init_domains(struct intel_iommu *iommu) { - u32 ndomains, nlongs; + u32 ndomains; size_t size; ndomains = cap_ndoms(iommu->cap); pr_debug("%s: Number of Domains supported <%d>\n", iommu->name, ndomains); - nlongs = BITS_TO_LONGS(ndomains); spin_lock_init(&iommu->lock); - iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL); + iommu->domain_ids = bitmap_zalloc(ndomains, GFP_KERNEL); if (!iommu->domain_ids) return -ENOMEM; @@ -1905,7 +1904,7 @@ static int iommu_init_domains(struct intel_iommu *iommu) if (!iommu->domains || !iommu->domains[0]) { pr_err("%s: Allocating domain array failed\n", iommu->name); - kfree(iommu->domain_ids); + bitmap_free(iommu->domain_ids); kfree(iommu->domains); iommu->domain_ids = NULL; iommu->domains = NULL; @@ -1966,7 +1965,7 @@ static void free_dmar_iommu(struct intel_iommu *iommu) for (i = 0; i < elems; i++) kfree(iommu->domains[i]); kfree(iommu->domains); - kfree(iommu->domain_ids); + bitmap_free(iommu->domain_ids); iommu->domains = NULL; iommu->domain_ids = NULL; } -- 2.30.2
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