Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cleanups from Ingo Molnar:
 "This topic tree contains more commits than usual:

   - most of it are uaccess cleanups/reorganization by Al

   - there's a bunch of prototype declaration (--Wmissing-prototypes)
     cleanups

   - misc other cleanups all around the map"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  x86/mm/set_memory: Fix -Wmissing-prototypes warnings
  x86/efi: Add a prototype for efi_arch_mem_reserve()
  x86/mm: Mark setup_emu2phys_nid() static
  x86/jump_label: Move 'inline' keyword placement
  x86/platform/uv: Add a missing prototype for uv_bau_message_interrupt()
  kill uaccess_try()
  x86: unsafe_put-style macro for sigmask
  x86: x32_setup_rt_frame(): consolidate uaccess areas
  x86: __setup_rt_frame(): consolidate uaccess areas
  x86: __setup_frame(): consolidate uaccess areas
  x86: setup_sigcontext(): list user_access_{begin,end}() into callers
  x86: get rid of put_user_try in __setup_rt_frame() (both 32bit and 64bit)
  x86: ia32_setup_rt_frame(): consolidate uaccess areas
  x86: ia32_setup_frame(): consolidate uaccess areas
  x86: ia32_setup_sigcontext(): lift user_access_{begin,end}() into the callers
  x86/alternatives: Mark text_poke_loc_init() static
  x86/cpu: Fix a -Wmissing-prototypes warning for init_ia32_feat_ctl()
  x86/mm: Drop pud_mknotpresent()
  x86: Replace setup_irq() by request_irq()
  x86/configs: Slightly reduce defconfigs
  ...

43 files changed, 445 insertions, 827 deletions

diff --git a/Documentation/x86/exception-tables.rst b/Documentation/x86/exception-tables.rst
index 81a393867f10..de58110c5ffd 100644
--- a/Documentation/x86/exception-tables.rst
+++ b/Documentation/x86/exception-tables.rst
@@ -340,12 +340,6 @@ pointer which points to one of:
      entry->insn. It is used to distinguish page faults from machine
      check.
 
-3) ``int ex_handler_ext(const struct exception_table_entry *fixup)``
-     This case is used for uaccess_err ... we need to set a flag
-     in the task structure. Before the handler functions existed this
-     case was handled by adding a large offset to the fixup to tag
-     it as special.
-
 More functions can easily be added.
 
 CONFIG_BUILDTIME_TABLE_SORT allows the __ex_table section to be sorted post
diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index 59ce9ed58430..5b602beb0b72 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -125,7 +125,6 @@ CONFIG_IP6_NF_MANGLE=y
 CONFIG_NET_SCHED=y
 CONFIG_NET_EMATCH=y
 CONFIG_NET_CLS_ACT=y
-CONFIG_HAMRADIO=y
 CONFIG_CFG80211=y
 CONFIG_MAC80211=y
 CONFIG_MAC80211_LEDS=y
@@ -171,7 +170,6 @@ CONFIG_FORCEDETH=y
 CONFIG_8139TOO=y
 # CONFIG_8139TOO_PIO is not set
 CONFIG_R8169=y
-CONFIG_FDDI=y
 CONFIG_INPUT_POLLDEV=y
 # CONFIG_INPUT_MOUSEDEV_PSAUX is not set
 CONFIG_INPUT_EVDEV=y
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index 0b9654c7a05c..f3d1f36103b1 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -123,7 +123,6 @@ CONFIG_IP6_NF_MANGLE=y
 CONFIG_NET_SCHED=y
 CONFIG_NET_EMATCH=y
 CONFIG_NET_CLS_ACT=y
-CONFIG_HAMRADIO=y
 CONFIG_CFG80211=y
 CONFIG_MAC80211=y
 CONFIG_MAC80211_LEDS=y
@@ -164,7 +163,6 @@ CONFIG_SKY2=y
 CONFIG_FORCEDETH=y
 CONFIG_8139TOO=y
 CONFIG_R8169=y
-CONFIG_FDDI=y
 CONFIG_INPUT_POLLDEV=y
 # CONFIG_INPUT_MOUSEDEV_PSAUX is not set
 CONFIG_INPUT_EVDEV=y
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 6062e8ebc315..76735ec813e6 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -34,6 +34,7 @@
 #include <asm/fpu/api.h>
 #include <asm/nospec-branch.h>
 #include <asm/io_bitmap.h>
+#include <asm/syscall.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/syscalls.h>
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 3bb738f5a472..a619763e96e1 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2490,7 +2490,7 @@ perf_callchain_user32(struct pt_regs *regs, struct perf_callchain_entry_ctx *ent
 	/* 32-bit process in 64-bit kernel. */
 	unsigned long ss_base, cs_base;
 	struct stack_frame_ia32 frame;
-	const void __user *fp;
+	const struct stack_frame_ia32 __user *fp;
 
 	if (!test_thread_flag(TIF_IA32))
 		return 0;
@@ -2501,18 +2501,12 @@ perf_callchain_user32(struct pt_regs *regs, struct perf_callchain_entry_ctx *ent
 	fp = compat_ptr(ss_base + regs->bp);
 	pagefault_disable();
 	while (entry->nr < entry->max_stack) {
-		unsigned long bytes;
-		frame.next_frame     = 0;
-		frame.return_address = 0;
-
 		if (!valid_user_frame(fp, sizeof(frame)))
 			break;
 
-		bytes = __copy_from_user_nmi(&frame.next_frame, fp, 4);
-		if (bytes != 0)
+		if (__get_user(frame.next_frame, &fp->next_frame))
 			break;
-		bytes = __copy_from_user_nmi(&frame.return_address, fp+4, 4);
-		if (bytes != 0)
+		if (__get_user(frame.return_address, &fp->return_address))
 			break;
 
 		perf_callchain_store(entry, cs_base + frame.return_address);
@@ -2533,7 +2527,7 @@ void
 perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
 {
 	struct stack_frame frame;
-	const unsigned long __user *fp;
+	const struct stack_frame __user *fp;
 
 	if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
 		/* TODO: We don't support guest os callchain now */
@@ -2546,7 +2540,7 @@ perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs
 	if (regs->flags & (X86_VM_MASK | PERF_EFLAGS_VM))
 		return;
 
-	fp = (unsigned long __user *)regs->bp;
+	fp = (void __user *)regs->bp;
 
 	perf_callchain_store(entry, regs->ip);
 
@@ -2558,19 +2552,12 @@ perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs
 
 	pagefault_disable();
 	while (entry->nr < entry->max_stack) {
-		unsigned long bytes;
-
-		frame.next_frame	     = NULL;
-		frame.return_address = 0;
-
 		if (!valid_user_frame(fp, sizeof(frame)))
 			break;
 
-		bytes = __copy_from_user_nmi(&frame.next_frame, fp, sizeof(*fp));
-		if (bytes != 0)
+		if (__get_user(frame.next_frame, &fp->next_frame))
 			break;
-		bytes = __copy_from_user_nmi(&frame.return_address, fp + 1, sizeof(*fp));
-		if (bytes != 0)
+		if (__get_user(frame.return_address, &fp->return_address))
 			break;
 
 		perf_callchain_store(entry, frame.return_address);
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index a3aefe9b9401..f9d8804144d0 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -36,70 +36,56 @@
 #include <asm/sighandling.h>
 #include <asm/smap.h>
 
+static inline void reload_segments(struct sigcontext_32 *sc)
+{
+	unsigned int cur;
+
+	savesegment(gs, cur);
+	if ((sc->gs | 0x03) != cur)
+		load_gs_index(sc->gs | 0x03);
+	savesegment(fs, cur);
+	if ((sc->fs | 0x03) != cur)
+		loadsegment(fs, sc->fs | 0x03);
+	savesegment(ds, cur);
+	if ((sc->ds | 0x03) != cur)
+		loadsegment(ds, sc->ds | 0x03);
+	savesegment(es, cur);
+	if ((sc->es | 0x03) != cur)
+		loadsegment(es, sc->es | 0x03);
+}
+
 /*
  * Do a signal return; undo the signal stack.
  */
-#define loadsegment_gs(v)	load_gs_index(v)
-#define loadsegment_fs(v)	loadsegment(fs, v)
-#define loadsegment_ds(v)	loadsegment(ds, v)
-#define loadsegment_es(v)	loadsegment(es, v)
-
-#define get_user_seg(seg)	({ unsigned int v; savesegment(seg, v); v; })
-#define set_user_seg(seg, v)	loadsegment_##seg(v)
-
-#define COPY(x)			{		\
-	get_user_ex(regs->x, &sc->x);		\
-}
-
-#define GET_SEG(seg)		({			\
-	unsigned short tmp;				\
-	get_user_ex(tmp, &sc->seg);			\
-	tmp;						\
-})
-
-#define COPY_SEG_CPL3(seg)	do {			\
-	regs->seg = GET_SEG(seg) | 3;			\
-} while (0)
-
-#define RELOAD_SEG(seg)		{		\
-	unsigned int pre = (seg) | 3;		\
-	unsigned int cur = get_user_seg(seg);	\
-	if (pre != cur)				\
-		set_user_seg(seg, pre);		\
-}
-
 static int ia32_restore_sigcontext(struct pt_regs *regs,
-				   struct sigcontext_32 __user *sc)
+				   struct sigcontext_32 __user *usc)
 {
-	unsigned int tmpflags, err = 0;
-	u16 gs, fs, es, ds;
-	void __user *buf;
-	u32 tmp;
+	struct sigcontext_32 sc;
 
 	/* Always make any pending restarted system calls return -EINTR */
 	current->restart_block.fn = do_no_restart_syscall;
 
-	get_user_try {
-		gs = GET_SEG(gs);
-		fs = GET_SEG(fs);
-		ds = GET_SEG(ds);
-		es = GET_SEG(es);
-
-		COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
-		COPY(dx); COPY(cx); COPY(ip); COPY(ax);
-		/* Don't touch extended registers */
-
-		COPY_SEG_CPL3(cs);
-		COPY_SEG_CPL3(ss);
-
-		get_user_ex(tmpflags, &sc->flags);
-		regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
-		/* disable syscall checks */
-		regs->orig_ax = -1;
+	if (unlikely(copy_from_user(&sc, usc, sizeof(sc))))
+		return -EFAULT;
 
-		get_user_ex(tmp, &sc->fpstate);
-		buf = compat_ptr(tmp);
-	} get_user_catch(err);
+	/* Get only the ia32 registers. */
+	regs->bx = sc.bx;
+	regs->cx = sc.cx;
+	regs->dx = sc.dx;
+	regs->si = sc.si;
+	regs->di = sc.di;
+	regs->bp = sc.bp;
+	regs->ax = sc.ax;
+	regs->sp = sc.sp;
+	regs->ip = sc.ip;
+
+	/* Get CS/SS and force CPL3 */
+	regs->cs = sc.cs | 0x03;
+	regs->ss = sc.ss | 0x03;
+
+	regs->flags = (regs->flags & ~FIX_EFLAGS) | (sc.flags & FIX_EFLAGS);
+	/* disable syscall checks */
+	regs->orig_ax = -1;
 
 	/*
 	 * Reload fs and gs if they have changed in the signal
@@ -107,14 +93,8 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
 	 * the handler, but does not clobber them at least in the
 	 * normal case.
 	 */
-	RELOAD_SEG(gs);
-	RELOAD_SEG(fs);
-	RELOAD_SEG(ds);
-	RELOAD_SEG(es);
-
-	err |= fpu__restore_sig(buf, 1);
-
-	return err;
+	reload_segments(&sc);
+	return fpu__restore_sig(compat_ptr(sc.fpstate), 1);
 }
 
 COMPAT_SYSCALL_DEFINE0(sigreturn)
@@ -126,10 +106,7 @@ COMPAT_SYSCALL_DEFINE0(sigreturn)
 	if (!access_ok(frame, sizeof(*frame)))
 		goto badframe;
 	if (__get_user(set.sig[0], &frame->sc.oldmask)
-	    || (_COMPAT_NSIG_WORDS > 1
-		&& __copy_from_user((((char *) &set.sig) + 4),
-				    &frame->extramask,
-				    sizeof(frame->extramask))))
+	    || __get_user(((__u32 *)&set)[1], &frame->extramask[0]))
 		goto badframe;
 
 	set_current_blocked(&set);
@@ -153,7 +130,7 @@ COMPAT_SYSCALL_DEFINE0(rt_sigreturn)
 
 	if (!access_ok(frame, sizeof(*frame)))
 		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+	if (__get_user(set.sig[0], (__u64 __user *)&frame->uc.uc_sigmask))
 		goto badframe;
 
 	set_current_blocked(&set);
@@ -175,44 +152,51 @@ badframe:
  * Set up a signal frame.
  */
 
-static int ia32_setup_sigcontext(struct sigcontext_32 __user *sc,
-				 void __user *fpstate,
-				 struct pt_regs *regs, unsigned int mask)
+#define get_user_seg(seg)	({ unsigned int v; savesegment(seg, v); v; })
+
+static __always_inline int
+__unsafe_setup_sigcontext32(struct sigcontext_32 __user *sc,
+			    void __user *fpstate,
+			    struct pt_regs *regs, unsigned int mask)
 {
-	int err = 0;
-
-	put_user_try {
-		put_user_ex(get_user_seg(gs), (unsigned int __user *)&sc->gs);
-		put_user_ex(get_user_seg(fs), (unsigned int __user *)&sc->fs);
-		put_user_ex(get_user_seg(ds), (unsigned int __user *)&sc->ds);
-		put_user_ex(get_user_seg(es), (unsigned int __user *)&sc->es);
-
-		put_user_ex(regs->di, &sc->di);
-		put_user_ex(regs->si, &sc->si);
-		put_user_ex(regs->bp, &sc->bp);
-		put_user_ex(regs->sp, &sc->sp);
-		put_user_ex(regs->bx, &sc->bx);
-		put_user_ex(regs->dx, &sc->dx);
-		put_user_ex(regs->cx, &sc->cx);
-		put_user_ex(regs->ax, &sc->ax);
-		put_user_ex(current->thread.trap_nr, &sc->trapno);
-		put_user_ex(current->thread.error_code, &sc->err);
-		put_user_ex(regs->ip, &sc->ip);
-		put_user_ex(regs->cs, (unsigned int __user *)&sc->cs);
-		put_user_ex(regs->flags, &sc->flags);
-		put_user_ex(regs->sp, &sc->sp_at_signal);
-		put_user_ex(regs->ss, (unsigned int __user *)&sc->ss);
-
-		put_user_ex(ptr_to_compat(fpstate), &sc->fpstate);
-
-		/* non-iBCS2 extensions.. */
-		put_user_ex(mask, &sc->oldmask);
-		put_user_ex(current->thread.cr2, &sc->cr2);
-	} put_user_catch(err);
-
-	return err;
+	unsafe_put_user(get_user_seg(gs), (unsigned int __user *)&sc->gs, Efault);
+	unsafe_put_user(get_user_seg(fs), (unsigned int __user *)&sc->fs, Efault);
+	unsafe_put_user(get_user_seg(ds), (unsigned int __user *)&sc->ds, Efault);
+	unsafe_put_user(get_user_seg(es), (unsigned int __user *)&sc->es, Efault);
+
+	unsafe_put_user(regs->di, &sc->di, Efault);
+	unsafe_put_user(regs->si, &sc->si, Efault);
+	unsafe_put_user(regs->bp, &sc->bp, Efault);
+	unsafe_put_user(regs->sp, &sc->sp, Efault);
+	unsafe_put_user(regs->bx, &sc->bx, Efault);
+	unsafe_put_user(regs->dx, &sc->dx, Efault);
+	unsafe_put_user(regs->cx, &sc->cx, Efault);
+	unsafe_put_user(regs->ax, &sc->ax, Efault);
+	unsafe_put_user(current->thread.trap_nr, &sc->trapno, Efault);
+	unsafe_put_user(current->thread.error_code, &sc->err, Efault);
+	unsafe_put_user(regs->ip, &sc->ip, Efault);
+	unsafe_put_user(regs->cs, (unsigned int __user *)&sc->cs, Efault);
+	unsafe_put_user(regs->flags, &sc->flags, Efault);
+	unsafe_put_user(regs->sp, &sc->sp_at_signal, Efault);
+	unsafe_put_user(regs->ss, (unsigned int __user *)&sc->ss, Efault);
+
+	unsafe_put_user(ptr_to_compat(fpstate), &sc->fpstate, Efault);
+
+	/* non-iBCS2 extensions.. */
+	unsafe_put_user(mask, &sc->oldmask, Efault);
+	unsafe_put_user(current->thread.cr2, &sc->cr2, Efault);
+	return 0;
+
+Efault:
+	return -EFAULT;
 }
 
+#define unsafe_put_sigcontext32(sc, fp, regs, set, label)		\
+do {									\
+	if (__unsafe_setup_sigcontext32(sc, fp, regs, set->sig[0]))	\
+		goto label;						\
+} while(0)
+
 /*
  * Determine which stack to use..
  */
@@ -252,8 +236,7 @@ int ia32_setup_frame(int sig, struct ksignal *ksig,
 {
 	struct sigframe_ia32 __user *frame;
 	void __user *restorer;
-	int err = 0;
-	void __user *fpstate = NULL;
+	void __user *fp = NULL;
 
 	/* copy_to_user optimizes that into a single 8 byte store */
 	static const struct {
@@ -266,22 +249,7 @@ int ia32_setup_frame(int sig, struct ksignal *ksig,
 		0x80cd,		/* int $0x80 */
 	};
 
-	frame = get_sigframe(ksig, regs, sizeof(*frame), &fpstate);
-
-	if (!access_ok(frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (__put_user(sig, &frame->sig))
-		return -EFAULT;
-
-	if (ia32_setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]))
-		return -EFAULT;
-
-	if (_COMPAT_NSIG_WORDS > 1) {
-		if (__copy_to_user(frame->extramask, &set->sig[1],
-				   sizeof(frame->extramask)))
-			return -EFAULT;
-	}
+	frame = get_sigframe(ksig, regs, sizeof(*frame), &fp);
 
 	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
 		restorer = ksig->ka.sa.sa_restorer;
@@ -294,19 +262,20 @@ int ia32_setup_frame(int sig, struct ksignal *ksig,
 			restorer = &frame->retcode;
 	}
 
-	put_user_try {
-		put_user_ex(ptr_to_compat(restorer), &frame->pretcode);
-
-		/*
-		 * These are actually not used anymore, but left because some
-		 * gdb versions depend on them as a marker.
-		 */
-		put_user_ex(*((u64 *)&code), (u64 __user *)frame->retcode);
-	} put_user_catch(err);
-
-	if (err)
+	if (!user_access_begin(frame, sizeof(*frame)))
 		return -EFAULT;
 
+	unsafe_put_user(sig, &frame->sig, Efault);
+	unsafe_put_sigcontext32(&frame->sc, fp, regs, set, Efault);
+	unsafe_put_user(set->sig[1], &frame->extramask[0], Efault);
+	unsafe_put_user(ptr_to_compat(restorer), &frame->pretcode, Efault);
+	/*
+	 * These are actually not used anymore, but left because some
+	 * gdb versions depend on them as a marker.
+	 */
+	unsafe_put_user(*((u64 *)&code), (u64 __user *)frame->retcode, Efault);
+	user_access_end();
+
 	/* Set up registers for signal handler */
 	regs->sp = (unsigned long) frame;
 	regs->ip = (unsigned long) ksig->ka.sa.sa_handler;
@@ -323,6 +292,9 @@ int ia32_setup_frame(int sig, struct ksignal *ksig,
 	regs->ss = __USER32_DS;
 
 	return 0;
+Efault:
+	user_access_end();
+	return -EFAULT;
 }
 
 int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
@@ -330,10 +302,9 @@ int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
 {
 	struct rt_sigframe_ia32 __user *frame;
 	void __user *restorer;
-	int err = 0;
-	void __user *fpstate = NULL;
+	void __user *fp = NULL;
 
-	/* __copy_to_user optimizes that into a single 8 byte store */
+	/* unsafe_put_user optimizes that into a single 8 byte store */
 	static const struct {
 		u8 movl;
 		u32 val;
@@ -346,44 +317,40 @@ int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
 		0,
 	};
 
-	frame = get_sigframe(ksig, regs, sizeof(*frame), &fpstate);
+	frame = get_sigframe(ksig, regs, sizeof(*frame), &fp);
 
-	if (!access_ok(frame, sizeof(*frame)))
+	if (!user_access_begin(frame, sizeof(*frame)))
 		return -EFAULT;
 
-	put_user_try {
-		put_user_ex(sig, &frame->sig);
-		put_user_ex(ptr_to_compat(&frame->info), &frame->pinfo);
-		put_user_ex(ptr_to_compat(&frame->uc), &frame->puc);
+	unsafe_put_user(sig, &frame->sig, Efault);
+	unsafe_put_user(ptr_to_compat(&frame->info), &frame->pinfo, Efault);
+	unsafe_put_user(ptr_to_compat(&frame->uc), &frame->puc, Efault);
 
-		/* Create the ucontext.  */
-		if (static_cpu_has(X86_FEATURE_XSAVE))
-			put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
-		else
-			put_user_ex(0, &frame->uc.uc_flags);
-		put_user_ex(0, &frame->uc.uc_link);
-		compat_save_altstack_ex(&frame->uc.uc_stack, regs->sp);
+	/* Create the ucontext.  */
+	if (static_cpu_has(X86_FEATURE_XSAVE))
+		unsafe_put_user(UC_FP_XSTATE, &frame->uc.uc_flags, Efault);
+	else
+		unsafe_put_user(0, &frame->uc.uc_flags, Efault);
+	unsafe_put_user(0, &frame->uc.uc_link, Efault);
+	unsafe_compat_save_altstack(&frame->uc.uc_stack, regs->sp, Efault);
 
-		if (ksig->ka.sa.sa_flags & SA_RESTORER)
-			restorer = ksig->ka.sa.sa_restorer;
-		else
-			restorer = current->mm->context.vdso +
-				vdso_image_32.sym___kernel_rt_sigreturn;
-		put_user_ex(ptr_to_compat(restorer), &frame->pretcode);
-
-		/*
-		 * Not actually used anymore, but left because some gdb
-		 * versions need it.
-		 */
-		put_user_ex(*((u64 *)&code), (u64 __user *)frame->retcode);
-	} put_user_catch(err);
-
-	err |= __copy_siginfo_to_user32(&frame->info, &ksig->info, false);
-	err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
-				     regs, set->sig[0]);
-	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
-
-	if (err)
+	if (ksig->ka.sa.sa_flags & SA_RESTORER)
+		restorer = ksig->ka.sa.sa_restorer;
+	else
+		restorer = current->mm->context.vdso +
+			vdso_image_32.sym___kernel_rt_sigreturn;
+	unsafe_put_user(ptr_to_compat(restorer), &frame->pretcode, Efault);
+
+	/*
+	 * Not actually used anymore, but left because some gdb
+	 * versions need it.
+	 */
+	unsafe_put_user(*((u64 *)&code), (u64 __user *)frame->retcode, Efault);
+	unsafe_put_sigcontext32(&frame->uc.uc_mcontext, fp, regs, set, Efault);
+	unsafe_put_user(*(__u64 *)set, (__u64 *)&frame->uc.uc_sigmask, Efault);
+	user_access_end();
+
+	if (__copy_siginfo_to_user32(&frame->info, &ksig->info, false))
 		return -EFAULT;
 
 	/* Set up registers for signal handler */
@@ -402,4 +369,7 @@ int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
 	regs->ss = __USER32_DS;
 
 	return 0;
+Efault:
+	user_access_end();
+	return -EFAULT;
 }
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index cd339b88d5d4..0f63585edf5f 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -138,9 +138,6 @@
 # define _ASM_EXTABLE_FAULT(from, to)				\
 	_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
 
-# define _ASM_EXTABLE_EX(from, to)				\
-	_ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
-
 # define _ASM_NOKPROBE(entry)					\
 	.pushsection "_kprobe_blacklist","aw" ;			\
 	_ASM_ALIGN ;						\
@@ -166,9 +163,6 @@
 # define _ASM_EXTABLE_FAULT(from, to)				\
 	_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
 
-# define _ASM_EXTABLE_EX(from, to)				\
-	_ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
-
 /* For C file, we already have NOKPROBE_SYMBOL macro */
 #endif
 
diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h
index 9d5252c9685c..b809f117f3f4 100644
--- a/arch/x86/include/asm/mwait.h
+++ b/arch/x86/include/asm/mwait.h
@@ -23,6 +23,8 @@
 #define MWAITX_MAX_LOOPS		((u32)-1)
 #define MWAITX_DISABLE_CSTATES		0xf0
 
+u32 get_umwait_control_msr(void);
+
 static inline void __monitor(const void *eax, unsigned long ecx,
 			     unsigned long edx)
 {
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 7e118660bbd9..d74dc560e3ab 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -595,12 +595,6 @@ static inline pmd_t pmd_mknotpresent(pmd_t pmd)
 		      __pgprot(pmd_flags(pmd) & ~(_PAGE_PRESENT|_PAGE_PROTNONE)));
 }
 
-static inline pud_t pud_mknotpresent(pud_t pud)
-{
-	return pfn_pud(pud_pfn(pud),
-	      __pgprot(pud_flags(pud) & ~(_PAGE_PRESENT|_PAGE_PROTNONE)));
-}
-
 static inline u64 flip_protnone_guard(u64 oldval, u64 val, u64 mask);
 
 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 94789db550df..3bcf27caf6c9 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -542,7 +542,6 @@ struct thread_struct {
 	mm_segment_t		addr_limit;
 
 	unsigned int		sig_on_uaccess_err:1;
-	unsigned int		uaccess_err:1;	/* uaccess failed */
 
 	/* Floating point and extended processor state */
 	struct fpu		fpu;
diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index 64c3dce374e5..950532ccbc4a 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -46,6 +46,8 @@ int set_memory_4k(unsigned long addr, int numpages);
 int set_memory_encrypted(unsigned long addr, int numpages);
 int set_memory_decrypted(unsigned long addr, int numpages);
 int set_memory_np_noalias(unsigned long addr, int numpages);
+int set_memory_nonglobal(unsigned long addr, int numpages);
+int set_memory_global(unsigned long addr, int numpages);
 
 int set_pages_array_uc(struct page **pages, int addrinarray);
 int set_pages_array_wc(struct page **pages, int addrinarray);
diff --git a/arch/x86/include/asm/sigframe.h b/arch/x86/include/asm/sigframe.h
index f176114c04d4..84eab2724875 100644
--- a/arch/x86/include/asm/sigframe.h
+++ b/arch/x86/include/asm/sigframe.h
@@ -33,11 +33,7 @@ struct sigframe_ia32 {
 	 * legacy application accessing/modifying it.
 	 */
 	struct _fpstate_32 fpstate_unused;
-#ifdef CONFIG_IA32_EMULATION
-	unsigned int extramask[_COMPAT_NSIG_WORDS-1];
-#else /* !CONFIG_IA32_EMULATION */
-	unsigned long extramask[_NSIG_WORDS-1];
-#endif /* CONFIG_IA32_EMULATION */
+	unsigned int extramask[1];
 	char retcode[8];
 	/* fp state follows here */
 };
diff --git a/arch/x86/include/asm/sighandling.h b/arch/x86/include/asm/sighandling.h
index bd26834724e5..65e667279e0f 100644
--- a/arch/x86/include/asm/sighandling.h
+++ b/arch/x86/include/asm/sighandling.h
@@ -14,7 +14,5 @@
 			 X86_EFLAGS_CF | X86_EFLAGS_RF)
 
 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
-int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
-		     struct pt_regs *regs, unsigned long mask);
 
 #endif /* _ASM_X86_SIGHANDLING_H */
diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h
index 643529417f74..7cbf733d11af 100644
--- a/arch/x86/include/asm/syscall.h
+++ b/arch/x86/include/asm/syscall.h
@@ -159,6 +159,11 @@ static inline int syscall_get_arch(struct task_struct *task)
 		task->thread_info.status & TS_COMPAT)
 		? AUDIT_ARCH_I386 : AUDIT_ARCH_X86_64;
 }
+
+void do_syscall_64(unsigned long nr, struct pt_regs *regs);
+void do_int80_syscall_32(struct pt_regs *regs);
+long do_fast_syscall_32(struct pt_regs *regs);
+
 #endif	/* CONFIG_X86_32 */
 
 #endif	/* _ASM_X86_SYSCALL_H */
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index ea6fc643ccfe..c8247a84244b 100644
--- a/arch/x86/incl