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authorAnton Blanchard <anton@samba.org>2013-08-07 02:01:51 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-08-14 15:33:40 +1000
commit54bb7f4bda0ee49f39dc593c2d73fe6053a99dbb (patch)
tree80a86974e8e89de50ec9eaacf3366a2f44c82986 /arch/powerpc/kvm/book3s_hv_rm_mmu.c
parent8bd0b119ae64bf448e5f45d208007950e0ac2754 (diff)
powerpc: Make rwlocks endian safe
Our ppc64 spinlocks and rwlocks use a trick where a lock token and the paca index are placed in the lock with a single store. Since we are using two u16s they need adjusting for little endian. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rm_mmu.c')
-rw-r--r--arch/powerpc/kvm/book3s_hv_rm_mmu.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index fc25689a9f35..c3785d4aeed7 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -363,7 +363,11 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
vcpu->arch.pgdir, true, &vcpu->arch.gpr[4]);
}
+#ifdef __BIG_ENDIAN__
#define LOCK_TOKEN (*(u32 *)(&get_paca()->lock_token))
+#else
+#define LOCK_TOKEN (*(u32 *)(&get_paca()->paca_index))
+#endif
static inline int try_lock_tlbie(unsigned int *lock)
{

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