From: kernel test robot <lkp@intel.com>
To: Andi Kleen <ak@linux.intel.com>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH] swiotlb: fix alloc_cast.cocci warnings
Date: Wed, 16 Feb 2022 12:11:09 +0800 [thread overview]
Message-ID: <20220216041109.GA35391@22a7a85ba86c> (raw)
In-Reply-To: <202202161256.1zrqppDy-lkp@intel.com>
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: 77d5cb1c6d4f ("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: 36c91f6d572820e8556972fd7644bd96798e85d6
commit: 77d5cb1c6d4fe32593d65a38b4732da6c90b8f29 [115/133] swiotlb: Split up single swiotlb lock
:::::: branch date: 19 hours ago
:::::: commit date: 2 weeks 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) {
next prev parent reply other threads:[~2022-02-16 4:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-16 4:19 [intel-tdx:guest-rebased 115/133] 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
2022-02-16 4:11 ` kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-03-26 8:10 [intel-tdx:guest-rebased 65/83] " kernel test robot
2022-03-26 8:09 ` [PATCH] swiotlb: fix alloc_cast.cocci warnings kernel test robot
2021-11-20 8:33 [intel-tdx:guest 129/144] kernel/dma/swiotlb.c:389:15-33: WARNING: casting value returned by memory allocation function to (struct io_tlb_area *) is useless kernel test robot
2021-11-20 8:33 ` [PATCH] swiotlb: fix alloc_cast.cocci warnings kernel test robot
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