Merge commit 'v2.6.32-rc4' into perf/core

Merge reason: we were on an -rc1 base, merge up to -rc4.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

9 files changed, 148 insertions, 23 deletions

diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index b537cb0e9b5..eee999853a7 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -39,6 +39,7 @@ typedef struct
 	struct sigcontext32 sc;
 	_sigregs32 sregs;
 	int signo;
+	__u32 gprs_high[NUM_GPRS];
 	__u8 retcode[S390_SYSCALL_SIZE];
 } sigframe32;
 
@@ -48,6 +49,7 @@ typedef struct
 	__u8 retcode[S390_SYSCALL_SIZE];
 	compat_siginfo_t info;
 	struct ucontext32 uc;
+	__u32 gprs_high[NUM_GPRS];
 } rt_sigframe32;
 
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
@@ -344,6 +346,30 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
 	return 0;
 }
 
+static int save_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs)
+{
+	__u32 gprs_high[NUM_GPRS];
+	int i;
+
+	for (i = 0; i < NUM_GPRS; i++)
+		gprs_high[i] = regs->gprs[i] >> 32;
+
+	return __copy_to_user(uregs, &gprs_high, sizeof(gprs_high));
+}
+
+static int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs)
+{
+	__u32 gprs_high[NUM_GPRS];
+	int err, i;
+
+	err = __copy_from_user(&gprs_high, uregs, sizeof(gprs_high));
+	if (err)
+		return err;
+	for (i = 0; i < NUM_GPRS; i++)
+		*(__u32 *)&regs->gprs[i] = gprs_high[i];
+	return 0;
+}
+
 asmlinkage long sys32_sigreturn(void)
 {
 	struct pt_regs *regs = task_pt_regs(current);
@@ -363,6 +389,8 @@ asmlinkage long sys32_sigreturn(void)
 
 	if (restore_sigregs32(regs, &frame->sregs))
 		goto badframe;
+	if (restore_sigregs_gprs_high(regs, frame->gprs_high))
+		goto badframe;
 
 	return regs->gprs[2];
 
@@ -394,6 +422,8 @@ asmlinkage long sys32_rt_sigreturn(void)
 
 	if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
 		goto badframe;
+	if (restore_sigregs_gprs_high(regs, frame->gprs_high))
+		goto badframe;
 
 	err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
 	st.ss_sp = compat_ptr(ss_sp);
@@ -474,6 +504,8 @@ static int setup_frame32(int sig, struct k_sigaction *ka,
 
 	if (save_sigregs32(regs, &frame->sregs))
 		goto give_sigsegv;
+	if (save_sigregs_gprs_high(regs, frame->gprs_high))
+		goto give_sigsegv;
 	if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs))
 		goto give_sigsegv;
 
@@ -529,13 +561,14 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
 		goto give_sigsegv;
 
 	/* Create the ucontext.  */
-	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags);
 	err |= __put_user(0, &frame->uc.uc_link);
 	err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
 	err |= __put_user(sas_ss_flags(regs->gprs[15]),
 	                  &frame->uc.uc_stack.ss_flags);
 	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
 	err |= save_sigregs32(regs, &frame->uc.uc_mcontext);
+	err |= save_sigregs_gprs_high(regs, frame->gprs_high);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 	if (err)
 		goto give_sigsegv;
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 682fb69dba2..cbd9901dc0f 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -409,7 +409,7 @@ sys32_munmap_wrapper:
 	.globl	sys32_truncate_wrapper
 sys32_truncate_wrapper:
 	llgtr	%r2,%r2			# const char *
-	llgfr	%r3,%r3			# unsigned long
+	lgfr	%r3,%r3			# long
 	jg	sys_truncate		# branch to system call
 
 	.globl	sys32_ftruncate_wrapper
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 57bdcb1e3cd..f5fe34dd821 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -185,9 +185,6 @@ unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
 {
 	struct ftrace_graph_ent trace;
 
-	/* Nmi's are currently unsupported. */
-	if (unlikely(in_nmi()))
-		goto out;
 	if (unlikely(atomic_read(&current->tracing_graph_pause)))
 		goto out;
 	if (ftrace_push_return_trace(parent, ip, &trace.depth, 0) == -EBUSY)
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index ab2e3ed28ab..639380a0c45 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -55,6 +55,8 @@ void *module_alloc(unsigned long size)
 /* Free memory returned from module_alloc */
 void module_free(struct module *mod, void *module_region)
 {
+	vfree(mod->arch.syminfo);
+	mod->arch.syminfo = NULL;
 	vfree(module_region);
 }
 
@@ -402,6 +404,7 @@ int module_finalize(const Elf_Ehdr *hdr,
 		    struct module *me)
 {
 	vfree(me->arch.syminfo);
+	me->arch.syminfo = NULL;
 	return module_bug_finalize(hdr, sechdrs, me);
 }
 
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index a8738676b26..653c6a17874 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -57,6 +57,7 @@
 enum s390_regset {
 	REGSET_GENERAL,
 	REGSET_FP,
+	REGSET_GENERAL_EXTENDED,
 };
 
 static void
@@ -879,6 +880,67 @@ static int s390_compat_regs_set(struct task_struct *target,
 	return rc;
 }
 
+static int s390_compat_regs_high_get(struct task_struct *target,
+				     const struct user_regset *regset,
+				     unsigned int pos, unsigned int count,
+				     void *kbuf, void __user *ubuf)
+{
+	compat_ulong_t *gprs_high;
+
+	gprs_high = (compat_ulong_t *)
+		&task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
+	if (kbuf) {
+		compat_ulong_t *k = kbuf;
+		while (count > 0) {
+			*k++ = *gprs_high;
+			gprs_high += 2;
+			count -= sizeof(*k);
+		}
+	} else {
+		compat_ulong_t __user *u = ubuf;
+		while (count > 0) {
+			if (__put_user(*gprs_high, u++))
+				return -EFAULT;
+			gprs_high += 2;
+			count -= sizeof(*u);
+		}
+	}
+	return 0;
+}
+
+static int s390_compat_regs_high_set(struct task_struct *target,
+				     const struct user_regset *regset,
+				     unsigned int pos, unsigned int count,
+				     const void *kbuf, const void __user *ubuf)
+{
+	compat_ulong_t *gprs_high;
+	int rc = 0;
+
+	gprs_high = (compat_ulong_t *)
+		&task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
+	if (kbuf) {
+		const compat_ulong_t *k = kbuf;
+		while (count > 0) {
+			*gprs_high = *k++;
+			*gprs_high += 2;
+			count -= sizeof(*k);
+		}
+	} else {
+		const compat_ulong_t  __user *u = ubuf;
+		while (count > 0 && !rc) {
+			unsigned long word;
+			rc = __get_user(word, u++);
+			if (rc)
+				break;
+			*gprs_high = word;
+			*gprs_high += 2;
+			count -= sizeof(*u);
+		}
+	}
+
+	return rc;
+}
+
 static const struct user_regset s390_compat_regsets[] = {
 	[REGSET_GENERAL] = {
 		.core_note_type = NT_PRSTATUS,
@@ -896,6 +958,14 @@ static const struct user_regset s390_compat_regsets[] = {
 		.get = s390_fpregs_get,
 		.set = s390_fpregs_set,
 	},
+	[REGSET_GENERAL_EXTENDED] = {
+		.core_note_type = NT_PRXSTATUS,
+		.n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
+		.size = sizeof(compat_long_t),
+		.align = sizeof(compat_long_t),
+		.get = s390_compat_regs_high_get,
+		.set = s390_compat_regs_high_set,
+	},
 };
 
 static const struct user_regset_view user_s390_compat_view = {
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 9ed13a1ed37..061479ff029 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -729,7 +729,7 @@ static void __init setup_hwcaps(void)
 
 	if ((facility_list & (1UL << (31 - 22)))
 	    && (facility_list & (1UL << (31 - 30))))
-		elf_hwcap |= 1UL << 8;
+		elf_hwcap |= HWCAP_S390_ETF3EH;
 
 	/*
 	 * Check for additional facilities with store-facility-list-extended.
@@ -748,11 +748,20 @@ static void __init setup_hwcaps(void)
 	    __stfle(&facility_list_extended, 1) > 0) {
 		if ((facility_list_extended & (1ULL << (63 - 42)))
 		    && (facility_list_extended & (1ULL << (63 - 44))))
-			elf_hwcap |= 1UL << 6;
+			elf_hwcap |= HWCAP_S390_DFP;
 	}
 
+	/*
+	 * Huge page support HWCAP_S390_HPAGE is bit 7.
+	 */
 	if (MACHINE_HAS_HPAGE)
-		elf_hwcap |= 1UL << 7;
+		elf_hwcap |= HWCAP_S390_HPAGE;
+
+	/*
+	 * 64-bit register support for 31-bit processes
+	 * HWCAP_S390_HIGH_GPRS is bit 9.
+	 */
+	elf_hwcap |= HWCAP_S390_HIGH_GPRS;
 
 	switch (S390_lowcore.cpu_id.machine) {
 	case 0x9672:
diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S
index fe927d0bc20..7c8653e27db 100644
--- a/arch/s390/kernel/swsusp_asm64.S
+++ b/arch/s390/kernel/swsusp_asm64.S
@@ -43,7 +43,7 @@ swsusp_arch_suspend:
 	lghi	%r1,0x1000
 
 	/* Save CPU address */
-	stap	__LC_CPU_ADDRESS(%r1)
+	stap	__LC_CPU_ADDRESS(%r0)
 
 	/* Store registers */
 	mvc	0x318(4,%r1),__SF_EMPTY(%r15)	/* move prefix to lowcore */
@@ -69,8 +69,21 @@ swsusp_arch_suspend:
 	stmg	%r0,%r15,0x280(%r1)		/* store general registers */
 
 	stpt	0x328(%r1)			/* store timer */
+	stck	__SF_EMPTY(%r15)		/* store clock */
 	stckc	0x330(%r1)			/* store clock comparator */
 
+	/* Update cputime accounting before going to sleep */
+	lg	%r0,__LC_LAST_UPDATE_TIMER
+	slg	%r0,0x328(%r1)
+	alg	%r0,__LC_SYSTEM_TIMER
+	stg	%r0,__LC_SYSTEM_TIMER
+	mvc	__LC_LAST_UPDATE_TIMER(8),0x328(%r1)
+	lg	%r0,__LC_LAST_UPDATE_CLOCK
+	slg	%r0,__SF_EMPTY(%r15)
+	alg	%r0,__LC_STEAL_TIMER
+	stg	%r0,__LC_STEAL_TIMER
+	mvc	__LC_LAST_UPDATE_CLOCK(8),__SF_EMPTY(%r15)
+
 	/* Activate DAT */
 	stosm	__SF_EMPTY(%r15),0x04
 
@@ -159,8 +172,7 @@ pgm_check_entry:
 	larl	%r1,.Lresume_cpu		/* Resume CPU address: r2 */
 	stap	0(%r1)
 	llgh	%r2,0(%r1)
-	lghi	%r3,0x1000
-	llgh	%r1,__LC_CPU_ADDRESS(%r3)	/* Suspend CPU address: r1 */
+	llgh	%r1,__LC_CPU_ADDRESS(%r0)	/* Suspend CPU address: r1 */
 	cgr	%r1,%r2
 	je	restore_registers		/* r1 = r2 -> nothing to do */
 	larl	%r4,.Lrestart_suspend_psw	/* Set new restart PSW */
@@ -200,8 +212,11 @@ restart_suspend:
 
 restore_registers:
 	/* Restore registers */
-	lghi	%r13,0x1000		/* %r1 = pointer to save arae */
+	lghi	%r13,0x1000		/* %r1 = pointer to save area */
 
+	/* Ignore time spent in suspended state. */
+	llgf	%r1,0x318(%r13)
+	stck	__LC_LAST_UPDATE_CLOCK(%r1)
 	spt	0x328(%r13)		/* reprogram timer */
 	//sckc	0x330(%r13)		/* set clock comparator */
 
@@ -229,9 +244,6 @@ restore_registers:
 	/* Load old stack */
 	lg	%r15,0x2f8(%r13)
 
-	/* Pointer to save area */
-	lghi	%r13,0x1000
-
 	/* Restore prefix register */
 	spx	0x318(%r13)
 
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 45a3e9a7ae2..adfb32aa6d5 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -247,6 +247,13 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	}
 
 	/*
+	 * Put vDSO base into mm struct. We need to do this before calling
+	 * install_special_mapping or the perf counter mmap tracking code
+	 * will fail to recognise it as a vDSO (since arch_vma_name fails).
+	 */
+	current->mm->context.vdso_base = vdso_base;
+
+	/*
 	 * our vma flags don't have VM_WRITE so by default, the process
 	 * isn't allowed to write those pages.
 	 * gdb can break that with ptrace interface, and thus trigger COW
@@ -267,14 +274,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 				     VM_ALWAYSDUMP,
 				     vdso_pagelist);
 	if (rc)
-		goto out_up;
-
-	/* Put vDSO base into mm struct */
-	current->mm->context.vdso_base = vdso_base;
-
-	up_write(&mm->mmap_sem);
-	return 0;
-
+		current->mm->context.vdso_base = 0;
 out_up:
 	up_write(&mm->mmap_sem);
 	return rc;
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index bc15ef93e65..a68ac10213b 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -51,6 +51,7 @@ SECTIONS
 
 	. = ALIGN(PAGE_SIZE);
 	_eshared = .;		/* End of shareable data */
+	_sdata = .;		/* Start of data section */
 
 	EXCEPTION_TABLE(16) :data