powerpc/kvm/booke: Fix build break due to stack frame size warning
Commit ce11e48b7fdd256ec68b932a89b397a790566031 ("KVM: PPC: E500: Add
userspace debug stub support") added "struct thread_struct" to the
stack of kvmppc_vcpu_run(). thread_struct is 1152 bytes on my build,
compared to 48 bytes for the recently-introduced "struct debug_reg".
Use the latter instead.
This fixes the following error:
cc1: warnings being treated as errors
arch/powerpc/kvm/booke.c: In function 'kvmppc_vcpu_run':
arch/powerpc/kvm/booke.c:760:1: error: the frame size of 1424 bytes is larger than 1024 bytes
make[2]: *** [arch/powerpc/kvm/booke.o] Error 1
make[1]: *** [arch/powerpc/kvm] Error 2
make[1]: *** Waiting for unfinished jobs....
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 53e65a2..0591e05 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -681,7 +681,7 @@
int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
int ret, s;
- struct thread_struct thread;
+ struct debug_reg debug;
#ifdef CONFIG_PPC_FPU
struct thread_fp_state fp;
int fpexc_mode;
@@ -723,9 +723,9 @@
#endif
/* Switch to guest debug context */
- thread.debug = vcpu->arch.shadow_dbg_reg;
- switch_booke_debug_regs(&thread);
- thread.debug = current->thread.debug;
+ debug = vcpu->arch.shadow_dbg_reg;
+ switch_booke_debug_regs(&debug);
+ debug = current->thread.debug;
current->thread.debug = vcpu->arch.shadow_dbg_reg;
kvmppc_fix_ee_before_entry();
@@ -736,8 +736,8 @@
We also get here with interrupts enabled. */
/* Switch back to user space debug context */
- switch_booke_debug_regs(&thread);
- current->thread.debug = thread.debug;
+ switch_booke_debug_regs(&debug);
+ current->thread.debug = debug;
#ifdef CONFIG_PPC_FPU
kvmppc_save_guest_fp(vcpu);