Merge commit '5bc66170dc486556a1e36fd384463536573f4b82' into x86/urgent

From Borislav Petkov <bp@amd64.org>:

Below is a RAS fix which reverts the addition of a sysfs attribute
which we agreed is not needed, post-factum. And this should go in now
because that sysfs attribute is going to end up in 3.7 otherwise and
thus exposed to userspace; removing it then would be a lot harder.

This is done as a merge rather than a simple patch/cherry-pick since
the baseline for this patch was not in the previous x86/urgent.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

16 files changed, 113 insertions, 125 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 3ff21b536f2..11def45b98c 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -13,12 +13,15 @@ config PARISC
 	select HAVE_PERF_EVENTS
 	select GENERIC_ATOMIC64 if !64BIT
 	select HAVE_GENERIC_HARDIRQS
+	select BROKEN_RODATA
 	select GENERIC_IRQ_PROBE
 	select GENERIC_PCI_IOMAP
 	select IRQ_PER_CPU
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_STRNCPY_FROM_USER
+	select HAVE_MOD_ARCH_SPECIFIC
+	select MODULES_USE_ELF_RELA
 
 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
diff --git a/arch/parisc/hpux/fs.c b/arch/parisc/hpux/fs.c
index c71eb6c7989..a0760b87fd4 100644
--- a/arch/parisc/hpux/fs.c
+++ b/arch/parisc/hpux/fs.c
@@ -34,14 +34,14 @@
 int hpux_execve(struct pt_regs *regs)
 {
 	int error;
-	char *filename;
+	struct filename *filename;
 
 	filename = getname((const char __user *) regs->gr[26]);
 	error = PTR_ERR(filename);
 	if (IS_ERR(filename))
 		goto out;
 
-	error = do_execve(filename,
+	error = do_execve(filename->name,
 			  (const char __user *const __user *) regs->gr[25],
 			  (const char __user *const __user *) regs->gr[24],
 			  regs);
@@ -109,33 +109,32 @@ Efault:
 
 int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
 {
-	struct file * file;
+	struct fd arg;
 	struct hpux_dirent __user * lastdirent;
 	struct getdents_callback buf;
-	int error = -EBADF;
+	int error;
 
-	file = fget(fd);
-	if (!file)
-		goto out;
+	arg = fdget(fd);
+	if (!arg.file)
+		return -EBADF;
 
 	buf.current_dir = dirent;
 	buf.previous = NULL;
 	buf.count = count;
 	buf.error = 0;
 
-	error = vfs_readdir(file, filldir, &buf);
+	error = vfs_readdir(arg.file, filldir, &buf);
 	if (error >= 0)
 		error = buf.error;
 	lastdirent = buf.previous;
 	if (lastdirent) {
-		if (put_user(file->f_pos, &lastdirent->d_off))
+		if (put_user(arg.file->f_pos, &lastdirent->d_off))
 			error = -EFAULT;
 		else
 			error = count - buf.count;
 	}
 
-	fput(file);
-out:
+	fdput(arg);
 	return error;
 }
 
diff --git a/arch/parisc/hpux/gate.S b/arch/parisc/hpux/gate.S
index 38a1c1b8d4e..011468857e9 100644
--- a/arch/parisc/hpux/gate.S
+++ b/arch/parisc/hpux/gate.S
@@ -71,7 +71,7 @@ ENTRY(hpux_gateway_page)
 	STREG	%r26, TASK_PT_GR26(%r1)	 	/* 1st argument */
 	STREG	%r27, TASK_PT_GR27(%r1)		/* user dp */
 	STREG   %r28, TASK_PT_GR28(%r1)         /* return value 0 */
-	STREG   %r28, TASK_PT_ORIG_R28(%r1)     /* return value 0 (saved for signals) */
+	STREG   %r0, TASK_PT_ORIG_R28(%r1)     /* don't prohibit restarts */
 	STREG   %r29, TASK_PT_GR29(%r1)         /* 8th argument */
 	STREG	%r31, TASK_PT_GR31(%r1)		/* preserve syscall return ptr */
 	
diff --git a/arch/parisc/include/asm/Kbuild b/arch/parisc/include/asm/Kbuild
index 4383707d980..458371a1565 100644
--- a/arch/parisc/include/asm/Kbuild
+++ b/arch/parisc/include/asm/Kbuild
@@ -1,4 +1,6 @@
 include include/asm-generic/Kbuild.asm
 
 header-y += pdc.h
+generic-y += clkdev.h
 generic-y += word-at-a-time.h
+generic-y += exec.h
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index 760f331d4fa..db7a662691a 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -36,6 +36,7 @@ typedef s64	compat_s64;
 typedef u32	compat_uint_t;
 typedef u32	compat_ulong_t;
 typedef u64	compat_u64;
+typedef u32	compat_uptr_t;
 
 struct compat_timespec {
 	compat_time_t		tv_sec;
@@ -127,6 +128,63 @@ typedef u32		compat_old_sigset_t;	/* at least 32 bits */
 
 typedef u32		compat_sigset_word;
 
+typedef union compat_sigval {
+	compat_int_t	sival_int;
+	compat_uptr_t	sival_ptr;
+} compat_sigval_t;
+
+typedef struct compat_siginfo {
+	int si_signo;
+	int si_errno;
+	int si_code;
+
+	union {
+		int _pad[128/sizeof(int) - 3];
+
+		/* kill() */
+		struct {
+			unsigned int _pid;      /* sender's pid */
+			unsigned int _uid;      /* sender's uid */
+		} _kill;
+
+		/* POSIX.1b timers */
+		struct {
+			compat_timer_t _tid;            /* timer id */
+			int _overrun;           /* overrun count */
+			char _pad[sizeof(unsigned int) - sizeof(int)];
+			compat_sigval_t _sigval;        /* same as below */
+			int _sys_private;       /* not to be passed to user */
+		} _timer;
+
+		/* POSIX.1b signals */
+		struct {
+			unsigned int _pid;      /* sender's pid */
+			unsigned int _uid;      /* sender's uid */
+			compat_sigval_t _sigval;
+		} _rt;
+
+		/* SIGCHLD */
+		struct {
+			unsigned int _pid;      /* which child */
+			unsigned int _uid;      /* sender's uid */
+			int _status;            /* exit code */
+			compat_clock_t _utime;
+			compat_clock_t _stime;
+		} _sigchld;
+
+		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+		struct {
+			unsigned int _addr;     /* faulting insn/memory ref. */
+		} _sigfault;
+
+		/* SIGPOLL */
+		struct {
+			int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
+			int _fd;
+		} _sigpoll;
+	} _sifields;
+} compat_siginfo_t;
+
 #define COMPAT_OFF_T_MAX	0x7fffffff
 #define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
 
@@ -136,7 +194,6 @@ typedef u32		compat_sigset_word;
  * as pointers because the syscall entry code will have
  * appropriately converted them already.
  */
-typedef	u32		compat_uptr_t;
 
 static inline void __user *compat_ptr(compat_uptr_t uptr)
 {
diff --git a/arch/parisc/include/asm/exec.h b/arch/parisc/include/asm/exec.h
deleted file mode 100644
index 6bb5af75b17..00000000000
--- a/arch/parisc/include/asm/exec.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __PARISC_EXEC_H
-#define __PARISC_EXEC_H
-
-#define arch_align_stack(x) (x)
-
-#endif /* __PARISC_EXEC_H */
diff --git a/arch/parisc/include/asm/module.h b/arch/parisc/include/asm/module.h
index 1f4123427ea..bab37e99168 100644
--- a/arch/parisc/include/asm/module.h
+++ b/arch/parisc/include/asm/module.h
@@ -1,21 +1,11 @@
 #ifndef _ASM_PARISC_MODULE_H
 #define _ASM_PARISC_MODULE_H
+
+#include <asm-generic/module.h>
+
 /*
  * This file contains the parisc architecture specific module code.
  */
-#ifdef CONFIG_64BIT
-#define Elf_Shdr Elf64_Shdr
-#define Elf_Sym Elf64_Sym
-#define Elf_Ehdr Elf64_Ehdr
-#define Elf_Addr Elf64_Addr
-#define Elf_Rela Elf64_Rela
-#else
-#define Elf_Shdr Elf32_Shdr
-#define Elf_Sym Elf32_Sym
-#define Elf_Ehdr Elf32_Ehdr
-#define Elf_Addr Elf32_Addr
-#define Elf_Rela Elf32_Rela
-#endif
 
 struct unwind_table;
 
diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index 22b4726dee4..d1fb79a36f3 100644
--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -68,13 +68,16 @@ struct thread_info {
 #define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
 #define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
 #define _TIF_32BIT		(1 << TIF_32BIT)
-#define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)
 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
 #define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
 #define _TIF_BLOCKSTEP		(1 << TIF_BLOCKSTEP)
 
 #define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
                                  _TIF_NEED_RESCHED)
+#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP |	\
+				 _TIF_BLOCKSTEP)
+
+#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
 
 #endif /* __KERNEL__ */
 
diff --git a/arch/parisc/include/uapi/asm/Kbuild b/arch/parisc/include/uapi/asm/Kbuild
new file mode 100644
index 00000000000..baebb3da1d4
--- /dev/null
+++ b/arch/parisc/include/uapi/asm/Kbuild
@@ -0,0 +1,3 @@
+# UAPI Header export list
+include include/uapi/asm-generic/Kbuild.asm
+
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 9d181890a7e..48e16dc2010 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -276,7 +276,6 @@ void flush_dcache_page(struct page *page)
 {
 	struct address_space *mapping = page_mapping(page);
 	struct vm_area_struct *mpnt;
-	struct prio_tree_iter iter;
 	unsigned long offset;
 	unsigned long addr, old_addr = 0;
 	pgoff_t pgoff;
@@ -299,7 +298,7 @@ void flush_dcache_page(struct page *page)
 	 * to flush one address here for them all to become coherent */
 
 	flush_dcache_mmap_lock(mapping);
-	vma_prio_tree_foreach(mpnt, &iter, &mapping->i_mmap, pgoff, pgoff) {
+	vma_interval_tree_foreach(mpnt, &mapping->i_mmap, pgoff, pgoff) {
 		offset = (pgoff - mpnt->vm_pgoff) << PAGE_SHIFT;
 		addr = mpnt->vm_start + offset;
 
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 47341aa208f..88238638aee 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -202,6 +202,7 @@ static int __init pdc_console_tty_driver_init(void)
 	pdc_console_tty_driver->flags = TTY_DRIVER_REAL_RAW |
 		TTY_DRIVER_RESET_TERMIOS;
 	tty_set_operations(pdc_console_tty_driver, &pdc_console_tty_ops);
+	tty_port_link_device(&tty_port, pdc_console_tty_driver, 0);
 
 	err = tty_register_driver(pdc_console_tty_driver);
 	if (err) {
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 2c05a9292a8..cbc37216bf9 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -48,6 +48,7 @@
 #include <linux/unistd.h>
 #include <linux/kallsyms.h>
 #include <linux/uaccess.h>
+#include <linux/rcupdate.h>
 
 #include <asm/io.h>
 #include <asm/asm-offsets.h>
@@ -69,8 +70,10 @@ void cpu_idle(void)
 
 	/* endless idle loop with no priority at all */
 	while (1) {
+		rcu_idle_enter();
 		while (!need_resched())
 			barrier();
+		rcu_idle_exit();
 		schedule_preempt_disabled();
 		check_pgt_cache();
 	}
@@ -339,13 +342,13 @@ unsigned long thread_saved_pc(struct task_struct *t)
 asmlinkage int sys_execve(struct pt_regs *regs)
 {
 	int error;
-	char *filename;
+	struct filename *filename;
 
 	filename = getname((const char __user *) regs->gr[26]);
 	error = PTR_ERR(filename);
 	if (IS_ERR(filename))
 		goto out;
-	error = do_execve(filename,
+	error = do_execve(filename->name,
 			  (const char __user *const __user *) regs->gr[25],
 			  (const char __user *const __user *) regs->gr[24],
 			  regs);
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 594459bde14..53799695599 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -113,6 +113,8 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
 		(usp - sigframe_size);
 	DBG(2,"sys_rt_sigreturn: frame is %p\n", frame);
 
+	regs->orig_r28 = 1; /* no restarts for sigreturn */
+
 #ifdef CONFIG_64BIT
 	compat_frame = (struct compat_rt_sigframe __user *)frame;
 	
@@ -437,7 +439,7 @@ give_sigsegv:
  * OK, we're invoking a handler.
  */	
 
-static long
+static void
 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 		struct pt_regs *regs, int in_syscall)
 {
@@ -447,7 +449,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 	
 	/* Set up the stack frame */
 	if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
-		return 0;
+		return;
 
 	signal_delivered(sig, info, ka, regs, 
 		test_thread_flag(TIF_SINGLESTEP) ||
@@ -455,13 +457,14 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 
 	DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
 		regs->gr[28]);
-
-	return 1;
 }
 
 static inline void
 syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
 {
+	if (regs->orig_r28)
+		return;
+	regs->orig_r28 = 1; /* no more restarts */
 	/* Check the return code */
 	switch (regs->gr[28]) {
 	case -ERESTART_RESTARTBLOCK:
@@ -482,8 +485,6 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
 		 * we have to do is fiddle the return pointer.
 		 */
 		regs->gr[31] -= 8; /* delayed branching */
-		/* Preserve original r28. */
-		regs->gr[28] = regs->orig_r28;
 		break;
 	}
 }
@@ -491,6 +492,9 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
 static inline void
 insert_restart_trampoline(struct pt_regs *regs)
 {
+	if (regs->orig_r28)
+		return;
+	regs->orig_r28 = 1; /* no more restarts */
 	switch(regs->gr[28]) {
 	case -ERESTART_RESTARTBLOCK: {
 		/* Restart the system call - no handlers present */
@@ -525,9 +529,6 @@ insert_restart_trampoline(struct pt_regs *regs)
 		flush_user_icache_range(regs->gr[30], regs->gr[30] + 4);
 
 		regs->gr[31] = regs->gr[30] + 8;
-		/* Preserve original r28. */
-		regs->gr[28] = regs->orig_r28;
-
 		return;
 	}
 	case -ERESTARTNOHAND:
@@ -539,9 +540,6 @@ insert_restart_trampoline(struct pt_regs *regs)
 		 * slot of the branch external instruction.
 		 */
 		regs->gr[31] -= 8;
-		/* Preserve original r28. */
-		regs->gr[28] = regs->orig_r28;
-
 		return;
 	}
 	default:
@@ -570,30 +568,17 @@ do_signal(struct pt_regs *regs, long in_syscall)
 	DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n",
 	       regs, regs->sr[7], in_syscall);
 
-	/* Everyone else checks to see if they are in kernel mode at
-	   this point and exits if that's the case.  I'm not sure why
-	   we would be called in that case, but for some reason we
-	   are. */
-
-	/* May need to force signal if handle_signal failed to deliver */
-	while (1) {
-		signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-		DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]); 
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+	DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]); 
 	
-		if (signr <= 0)
-		  break;
-		
+	if (signr > 0) {
 		/* Restart a system call if necessary. */
 		if (in_syscall)
 			syscall_restart(regs, &ka);
 
-		/* Whee!  Actually deliver the signal.  If the
-		   delivery failed, we need to continue to iterate in
-		   this loop so we can deliver the SIGSEGV... */
-		if (handle_signal(signr, &info, &ka, regs, in_syscall))
-			return;
+		handle_signal(signr, &info, &ka, regs, in_syscall);
+		return;
 	}
-	/* end of while(1) looping forever if we can't force a signal */
 
 	/* Did we come from a system call? */
 	if (in_syscall)
diff --git a/arch/parisc/kernel/signal32.h b/arch/parisc/kernel/signal32.h
index c7800846422..08a88b5349a 100644
--- a/arch/parisc/kernel/signal32.h
+++ b/arch/parisc/kernel/signal32.h
@@ -55,58 +55,6 @@ struct k_sigaction32 {
 	struct compat_sigaction sa;
 };
 
-typedef struct compat_siginfo {
-        int si_signo;
-        int si_errno;
-        int si_code;
-
-        union {
-                int _pad[((128/sizeof(int)) - 3)];
-
-                /* kill() */
-                struct {
-                        unsigned int _pid;      /* sender's pid */
-                        unsigned int _uid;      /* sender's uid */
-                } _kill;
-
-                /* POSIX.1b timers */
-                struct {
-                        compat_timer_t _tid;            /* timer id */
-                        int _overrun;           /* overrun count */
-                        char _pad[sizeof(unsigned int) - sizeof(int)];
-                        compat_sigval_t _sigval;        /* same as below */
-                        int _sys_private;       /* not to be passed to user */
-                } _timer;
-
-                /* POSIX.1b signals */
-                struct {
-                        unsigned int _pid;      /* sender's pid */
-                        unsigned int _uid;      /* sender's uid */
-                        compat_sigval_t _sigval;
-                } _rt;
-
-                /* SIGCHLD */
-                struct {
-                        unsigned int _pid;      /* which child */
-                        unsigned int _uid;      /* sender's uid */
-                        int _status;            /* exit code */
-                        compat_clock_t _utime;
-                        compat_clock_t _stime;
-                } _sigchld;
-
-                /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
-                struct {
-                        unsigned int _addr;     /* faulting insn/memory ref. */
-                } _sigfault;
-
-                /* SIGPOLL */
-                struct {
-                        int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
-                        int _fd;
-                } _sigpoll;
-        } _sifields;
-} compat_siginfo_t;
-
 int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
 int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
 
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index dc9a6246232..bf5b93a885d 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -60,14 +60,14 @@
 asmlinkage int sys32_execve(struct pt_regs *regs)
 {
 	int error;
-	char *filename;
+	struct filename *filename;
 
 	DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
 	filename = getname((const char __user *) regs->gr[26]);
 	error = PTR_ERR(filename);
 	if (IS_ERR(filename))
 		goto out;
-	error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
+	error = compat_do_execve(filename->name, compat_ptr(regs->gr[25]),
 				 compat_ptr(regs->gr[24]), regs);
 	putname(filename);
 out:
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 82a52b2fb13..86742df0b19 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -156,7 +156,7 @@ linux_gateway_entry:
 	STREG	%r26, TASK_PT_GR26(%r1)	 	/* 1st argument */
 	STREG	%r27, TASK_PT_GR27(%r1)		/* user dp */
 	STREG   %r28, TASK_PT_GR28(%r1)         /* return value 0 */
-	STREG   %r28, TASK_PT_ORIG_R28(%r1)     /* return value 0 (saved for signals) */
+	STREG   %r0, TASK_PT_ORIG_R28(%r1)      /* don't prohibit restarts */
 	STREG	%r29, TASK_PT_GR29(%r1)		/* return value 1 */
 	STREG	%r31, TASK_PT_GR31(%r1)		/* preserve syscall return ptr */
 	
@@ -180,9 +180,10 @@ linux_gateway_entry:
 
 	/* Are we being ptraced? */
 	mfctl	%cr30, %r1
-	LDREG	TI_TASK(%r1),%r1
-	ldw	TASK_PTRACE(%r1), %r1
-	bb,<,n	%r1,31,.Ltracesys
+	LDREG	TI_FLAGS(%r1),%r1
+	ldi	_TIF_SYSCALL_TRACE_MASK, %r19
+	and,COND(=) %r1, %r19, %r0
+	b,n	.Ltracesys
 	
 	/* Note!  We cannot use the syscall table that is mapped
 	nearby since the gateway page is mapped execute-only. */