* [PATCH] swiotlb: fix alloc_cast.cocci warnings
2022-03-26 8:10 [intel-tdx:guest-rebased 65/83] kernel/dma/swiotlb.c:433:15-33: WARNING: casting value returned by memory allocation function to (struct io_tlb_area *) is useless kernel test robot
@ 2022-03-26 8:09 ` kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2022-03-26 8:09 UTC (permalink / raw)
To: Andi Kleen; +Cc: kbuild-all, linux-kernel, Kuppuswamy Sathyanarayanan
From: kernel test robot <lkp@intel.com>
kernel/dma/swiotlb.c:433:15-33: 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: 4ab45cefa80f ("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-rebased
head: 4c095660b91dbdd18042456e395af0deeef93485
commit: 4ab45cefa80f97ba2bdc31226523c891832d1080 [65/83] swiotlb: Split up single swiotlb lock
:::::: branch date: 13 hours ago
:::::: commit date: 3 days ago
kernel/dma/swiotlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -430,7 +430,7 @@ 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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