Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:
 "There is only one new feature in this pull for the 4.4 merge window,
  most of it is small enhancements, cleanup and bug fixes:

   - Add the s390 backend for the software dirty bit tracking.  This
     adds two new pgtable functions pte_clear_soft_dirty and
     pmd_clear_soft_dirty which is why there is a hit to
     arch/x86/include/asm/pgtable.h in this pull request.

   - A series of cleanup patches for the AP bus, this includes the
     removal of the support for two outdated crypto cards (PCICC and
     PCICA).

   - The irq handling / signaling on buffer full in the runtime
     instrumentation code is dropped.

   - Some micro optimizations: remove unnecessary memory barriers for a
     couple of functions: [smb_]rmb, [smb_]wmb, atomics, bitops, and for
     spin_unlock.  Use the builtin bswap if available and make
     test_and_set_bit_lock more cache friendly.

   - Statistics and a tracepoint for the diagnose calls to the
     hypervisor.

   - The CPU measurement facility support to sample KVM guests is
     improved.

   - The vector instructions are now always enabled for user space
     processes if the hardware has the vector facility.  This simplifies
     the FPU handling code.  The fpu-internal.h header is split into fpu
     internals, api and types just like x86.

   - Cleanup and improvements for the common I/O layer.

   - Rework udelay to solve a problem with kprobe.  udelay has busy loop
     semantics but still uses an idle processor state for the wait"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (66 commits)
  s390: remove runtime instrumentation interrupts
  s390/cio: de-duplicate subchannel validation
  s390/css: unneeded initialization in for_each_subchannel
  s390/Kconfig: use builtin bswap
  s390/dasd: fix disconnected device with valid path mask
  s390/dasd: fix invalid PAV assignment after suspend/resume
  s390/dasd: fix double free in dasd_eckd_read_conf
  s390/kernel: fix ptrace peek/poke for floating point registers
  s390/cio: move ccw_device_stlck functions
  s390/cio: move ccw_device_call_handler
  s390/topology: reduce per_cpu() invocations
  s390/nmi: reduce size of percpu variable
  s390/nmi: fix terminology
  s390/nmi: remove casts
  s390/nmi: remove pointless error strings
  s390: don't store registers on disabled wait anymore
  s390: get rid of __set_psw_mask()
  s390/fpu: split fpu-internal.h into fpu internals, api, and type headers
  s390/dasd: fix list_del corruption after lcu changes
  s390/spinlock: remove unneeded serializations at unlock
  ...

1 files changed, 0 insertions, 6 deletions

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 0a67c40eece9..c6b4063fce29 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1292,7 +1292,6 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 static inline void save_fpu_to(struct fpu *dst)
 {
 	dst->fpc = current->thread.fpu.fpc;
-	dst->flags = current->thread.fpu.flags;
 	dst->regs = current->thread.fpu.regs;
 }
 
@@ -1303,7 +1302,6 @@ static inline void save_fpu_to(struct fpu *dst)
 static inline void load_fpu_from(struct fpu *from)
 {
 	current->thread.fpu.fpc = from->fpc;
-	current->thread.fpu.flags = from->flags;
 	current->thread.fpu.regs = from->regs;
 }
 
@@ -1315,15 +1313,12 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 
 	if (test_kvm_facility(vcpu->kvm, 129)) {
 		current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
-		current->thread.fpu.flags = FPU_USE_VX;
 		/*
 		 * Use the register save area in the SIE-control block
 		 * for register restore and save in kvm_arch_vcpu_put()
 		 */
 		current->thread.fpu.vxrs =
 			(__vector128 *)&vcpu->run->s.regs.vrs;
-		/* Always enable the vector extension for KVM */
-		__ctl_set_vx();
 	} else
 		load_fpu_from(&vcpu->arch.guest_fpregs);
 
@@ -2326,7 +2321,6 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
 		 * registers and the FPC value and store them in the
 		 * guest_fpregs structure.
 		 */
-		WARN_ON(!is_vx_task(current));	  /* XXX remove later */
 		vcpu->arch.guest_fpregs.fpc = current->thread.fpu.fpc;
 		convert_vx_to_fp(vcpu->arch.guest_fpregs.fprs,
 				 current->thread.fpu.vxrs);