linux-kernel - [PATCH] KVM: x86: fix noderef.cocci warnings

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Date:   Sun, 14 Nov 2021 09:58:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     David Stevens <stevensd@...omium.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        0day robot <lkp@...el.com>
Subject: [PATCH] KVM: x86: fix noderef.cocci warnings

From: kernel test robot <lkp@...el.com>

arch/x86/kvm/mmu/page_track.c:95:39-45: ERROR: application of sizeof to pointer

 sizeof when applied to a pointer typed expression gives the size of
 the pointer

Generated by: scripts/coccinelle/misc/noderef.cocci

CC: David Stevens <stevensd@...omium.org>
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: kernel test robot <lkp@...el.com>
---

tree:   https://github.com/0day-ci/linux/commits/David-Stevens/KVM-x86-skip-gfn_track-allocation-when-possible/20210922-134429
head:   e8c58ba667b80c8c238fb54320c7f774c631dfd5
commit: e8c58ba667b80c8c238fb54320c7f774c631dfd5 KVM: x86: only allocate gfn_track when necessary
:::::: branch date: 8 weeks ago
:::::: commit date: 8 weeks ago

 page_track.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/kvm/mmu/page_track.c
+++ b/arch/x86/kvm/mmu/page_track.c
@@ -92,7 +92,8 @@ int kvm_page_track_enable_mmu_write_trac
 		slots = __kvm_memslots(kvm, i);
 		kvm_for_each_memslot(slot, slots) {
 			gfn_track = slot->arch.gfn_track + KVM_PAGE_TRACK_WRITE;
-			*gfn_track = kvcalloc(slot->npages, sizeof(*gfn_track),
+			*gfn_track = kvcalloc(slot->npages,
+					      sizeof(**gfn_track),
 					      GFP_KERNEL_ACCOUNT);
 			if (*gfn_track == NULL) {
 				mutex_unlock(&kvm->slots_arch_lock);