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| author |   Alexander Graf <agraf@suse.de> | 2012-03-13 19:59:39 +0100 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2012-04-03 16:42:14 +1000 |
| commit | b8e6f8ae511d88732247aa2af26bfd1bef21b2f4 (patch) | |
| tree | d5b4829b97465aef2660ec4cef3f38b70b402608 /arch/powerpc | |
| parent | Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi (diff) | |
| download | linux-dev-b8e6f8ae511d88732247aa2af26bfd1bef21b2f4.tar.xz linux-dev-b8e6f8ae511d88732247aa2af26bfd1bef21b2f4.zip | |
KVM: PPC: Book3S: Compile fix for ppc32 in HIOR access code
We were failing to compile on book3s_32 with the following errors:
arch/powerpc/kvm/book3s_pr.c:883:45: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:898:79: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
Fix this by explicity casting the u64 to long before we use it as a pointer.
Also, on PPC32 we can not use get_user/put_user for 64bit wide variables,
as there is no single instruction that could load or store variables that big.
So instead, we have to use copy_from/to_user which works everywhere.
Reported-by: Jörg Sommer <joerg@alea.gnuu.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 642d88574b07..a657c44b7fbc 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -881,7 +881,8 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) switch (reg->id) { case KVM_REG_PPC_HIOR: - r = put_user(to_book3s(vcpu)->hior, (u64 __user *)reg->addr); + r = copy_to_user((u64 __user *)(long)reg->addr, + &to_book3s(vcpu)->hior, sizeof(u64)); break; default: break; @@ -896,7 +897,8 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) switch (reg->id) { case KVM_REG_PPC_HIOR: - r = get_user(to_book3s(vcpu)->hior, (u64 __user *)reg->addr); + r = copy_from_user(&to_book3s(vcpu)->hior, + (u64 __user *)(long)reg->addr, sizeof(u64)); if (!r) to_book3s(vcpu)->hior_explicit = true; break; |