From: Thomas Meyer <thomas@m3y3r.de>
To: Avi Kivity <avi@redhat.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] KVM: Use kmemdup rather than duplicating its implementation
Date: Tue, 08 Nov 2011 20:32:19 +0100 [thread overview]
Message-ID: <1320780750.8062.152.camel@localhost.localdomain> (raw)
From: Thomas Meyer <thomas@m3y3r.de>
Use kmemdup rather than duplicating its implementation
The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.
More information about semantic patching is available at
http://coccinelle.lip6.fr/
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
---
diff -u -p a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
--- a/virt/kvm/kvm_main.c 2011-11-07 19:38:38.350717404 +0100
+++ b/virt/kvm/kvm_main.c 2011-11-08 10:33:24.522069993 +0100
@@ -775,10 +775,10 @@ skip_lpage:
if (!npages) {
r = -ENOMEM;
- slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+ slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots),
+ GFP_KERNEL);
if (!slots)
goto out_free;
- memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
if (mem->slot >= slots->nmemslots)
slots->nmemslots = mem->slot + 1;
slots->generation++;
@@ -810,10 +810,10 @@ skip_lpage:
}
r = -ENOMEM;
- slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+ slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots),
+ GFP_KERNEL);
if (!slots)
goto out_free;
- memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
if (mem->slot >= slots->nmemslots)
slots->nmemslots = mem->slot + 1;
slots->generation++;
@@ -2520,10 +2520,9 @@ int kvm_io_bus_register_dev(struct kvm *
if (bus->dev_count > NR_IOBUS_DEVS-1)
return -ENOSPC;
- new_bus = kzalloc(sizeof(struct kvm_io_bus), GFP_KERNEL);
+ new_bus = kmemdup(bus, sizeof(struct kvm_io_bus), GFP_KERNEL);
if (!new_bus)
return -ENOMEM;
- memcpy(new_bus, bus, sizeof(struct kvm_io_bus));
kvm_io_bus_insert_dev(new_bus, dev, addr, len);
rcu_assign_pointer(kvm->buses[bus_idx], new_bus);
synchronize_srcu_expedited(&kvm->srcu);
reply other threads:[~2011-11-08 19:32 UTC|newest]
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