Messages in this thread Patch in this message | | | Date | Sat, 20 Nov 2021 16:33:30 +0800 | From | kernel test robot <> | Subject | [PATCH] swiotlb: fix alloc_cast.cocci warnings |
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From: kernel test robot <lkp@intel.com>
kernel/dma/swiotlb.c:389:15-33: WARNING: casting value returned by memory allocation function to (struct io_tlb_area *) is useless.
Remove casting the values returned by memory allocation functions like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc.
Semantic patch information: This makes an effort to find cases of casting of values returned by kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc, kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes the casting as it is not required. The result in the patch case may need some reformatting.
Generated by: scripts/coccinelle/api/alloc/alloc_cast.cocci
Fixes: 4529b5784c14 ("swiotlb: Split up single swiotlb lock") CC: Andi Kleen <ak@linux.intel.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: kernel test robot <lkp@intel.com> ---
tree: https://github.com/intel/tdx.git guest head: 41fe88a1b3c28543f49fa6ed9e0e9b6650ed7614 commit: 4529b5784c141782c72ec9bd9a92df2b68cb7d45 [129/144] swiotlb: Split up single swiotlb lock :::::: branch date: 9 days ago :::::: commit date: 9 days ago
swiotlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -386,7 +386,7 @@ swiotlb_late_init_with_tbl(char *tlb, un return -ENOMEM; } - mem->areas = (struct io_tlb_area *)kcalloc(num_areas, + mem->areas = kcalloc(num_areas, sizeof(struct io_tlb_area), GFP_KERNEL); if (!mem->areas) {
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