These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

11 files changed, 78 insertions, 188 deletions

diff --git a/kernel/arch/um/include/asm/Kbuild b/kernel/arch/um/include/asm/Kbuild
index 9176fa11d..904f3ebf4 100644
--- a/kernel/arch/um/include/asm/Kbuild
+++ b/kernel/arch/um/include/asm/Kbuild
@@ -16,14 +16,14 @@ generic-y += irq_regs.h
 generic-y += irq_work.h
 generic-y += kdebug.h
 generic-y += mcs_spinlock.h
+generic-y += mm-arch-hooks.h
 generic-y += mutex.h
 generic-y += param.h
 generic-y += pci.h
 generic-y += percpu.h
 generic-y += preempt.h
-generic-y += scatterlist.h
-generic-y += sections.h
 generic-y += switch_to.h
 generic-y += topology.h
 generic-y += trace_clock.h
+generic-y += word-at-a-time.h
 generic-y += xor.h
diff --git a/kernel/arch/um/include/asm/ptrace-generic.h b/kernel/arch/um/include/asm/ptrace-generic.h
index cb9b3c47c..5ab20620f 100644
--- a/kernel/arch/um/include/asm/ptrace-generic.h
+++ b/kernel/arch/um/include/asm/ptrace-generic.h
@@ -8,7 +8,6 @@
 
 #ifndef __ASSEMBLY__
 
-#include <asm/ptrace-abi.h>
 #include <sysdep/ptrace.h>
 
 struct pt_regs {
@@ -28,6 +27,8 @@ struct pt_regs {
 
 #define instruction_pointer(regs) PT_REGS_IP(regs)
 
+#define PTRACE_OLDSETOPTIONS 21
+
 struct task_struct;
 
 extern long subarch_ptrace(struct task_struct *child, long request,
@@ -37,7 +38,7 @@ extern int putreg(struct task_struct *child, int regno, unsigned long value);
 
 extern int arch_copy_tls(struct task_struct *new);
 extern void clear_flushed_tls(struct task_struct *task);
-extern void syscall_trace_enter(struct pt_regs *regs);
+extern int syscall_trace_enter(struct pt_regs *regs);
 extern void syscall_trace_leave(struct pt_regs *regs);
 
 #endif
diff --git a/kernel/arch/um/include/asm/sections.h b/kernel/arch/um/include/asm/sections.h
new file mode 100644
index 000000000..cafcf684d
--- /dev/null
+++ b/kernel/arch/um/include/asm/sections.h
@@ -0,0 +1,9 @@
+#ifndef __UM_SECTIONS_H
+#define __UM_SECTIONS_H
+
+#include <asm-generic/sections.h>
+
+extern char __binary_start[];
+extern char __syscall_stub_start[], __syscall_stub_end[];
+
+#endif
diff --git a/kernel/arch/um/include/asm/thread_info.h b/kernel/arch/um/include/asm/thread_info.h
index b30c85b14..53968aaf7 100644
--- a/kernel/arch/um/include/asm/thread_info.h
+++ b/kernel/arch/um/include/asm/thread_info.h
@@ -10,7 +10,7 @@
 
 #include <asm/types.h>
 #include <asm/page.h>
-#include <asm/uaccess.h>
+#include <asm/segment.h>
 
 struct thread_info {
 	struct task_struct	*task;		/* main task structure */
diff --git a/kernel/arch/um/include/asm/uaccess.h b/kernel/arch/um/include/asm/uaccess.h
index 3f22fbf7c..3705620ca 100644
--- a/kernel/arch/um/include/asm/uaccess.h
+++ b/kernel/arch/um/include/asm/uaccess.h
@@ -1,178 +1,52 @@
 /* 
  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2015 Richard Weinberger (richard@nod.at)
  * Licensed under the GPL
  */
 
 #ifndef __UM_UACCESS_H
 #define __UM_UACCESS_H
 
-/* thread_info has a mm_segment_t in it, so put the definition up here */
-typedef struct {
-	unsigned long seg;
-} mm_segment_t;
-
-#include <linux/thread_info.h>
-#include <linux/errno.h>
-#include <asm/processor.h>
+#include <asm/thread_info.h>
 #include <asm/elf.h>
 
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not.  If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- */
-
-#define MAKE_MM_SEG(s)	((mm_segment_t) { (s) })
-
-#define KERNEL_DS	MAKE_MM_SEG(0xFFFFFFFF)
-#define USER_DS		MAKE_MM_SEG(TASK_SIZE)
-
-#define get_ds()	(KERNEL_DS)
-#define get_fs()	(current_thread_info()->addr_limit)
-#define set_fs(x)	(current_thread_info()->addr_limit = (x))
-
-#define segment_eq(a, b) ((a).seg == (b).seg)
-
 #define __under_task_size(addr, size) \
 	(((unsigned long) (addr) < TASK_SIZE) && \
 	 (((unsigned long) (addr) + (size)) < TASK_SIZE))
 
-#define __access_ok_vsyscall(type, addr, size) \
-	 ((type == VERIFY_READ) && \
-	  ((unsigned long) (addr) >= FIXADDR_USER_START) && \
+#define __access_ok_vsyscall(addr, size) \
+	  (((unsigned long) (addr) >= FIXADDR_USER_START) && \
 	  ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
 	  ((unsigned long) (addr) + (size) >= (unsigned long)(addr)))
 
 #define __addr_range_nowrap(addr, size) \
 	((unsigned long) (addr) <= ((unsigned long) (addr) + (size)))
 
-#define access_ok(type, addr, size) \
-	(__addr_range_nowrap(addr, size) && \
-	 (__under_task_size(addr, size) || \
-	  __access_ok_vsyscall(type, addr, size) || \
-	  segment_eq(get_fs(), KERNEL_DS)))
-
-extern int copy_from_user(void *to, const void __user *from, int n);
-extern int copy_to_user(void __user *to, const void *from, int n);
-
-/*
- * strncpy_from_user: - Copy a NUL terminated string from userspace.
- * @dst:   Destination address, in kernel space.  This buffer must be at
- *         least @count bytes long.
- * @src:   Source address, in user space.
- * @count: Maximum number of bytes to copy, including the trailing NUL.
- *
- * Copies a NUL-terminated string from userspace to kernel space.
- *
- * On success, returns the length of the string (not including the trailing
- * NUL).
- *
- * If access to userspace fails, returns -EFAULT (some data may have been
- * copied).
- *
- * If @count is smaller than the length of the string, copies @count bytes
- * and returns @count.
- */
-
-extern int strncpy_from_user(char *dst, const char __user *src, int count);
-
-/*
- * __clear_user: - Zero a block of memory in user space, with less checking.
- * @to:   Destination address, in user space.
- * @n:    Number of bytes to zero.
- *
- * Zero a block of memory in user space.  Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be cleared.
- * On success, this will be zero.
- */
-extern int __clear_user(void __user *mem, int len);
-
-/*
- * clear_user: - Zero a block of memory in user space.
- * @to:   Destination address, in user space.
- * @n:    Number of bytes to zero.
- *
- * Zero a block of memory in user space.
- *
- * Returns number of bytes that could not be cleared.
- * On success, this will be zero.
- */
-extern int clear_user(void __user *mem, int len);
-
-/*
- * strlen_user: - Get the size of a string in user space.
- * @str: The string to measure.
- * @n:   The maximum valid length
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- * If the string is too long, returns a value greater than @n.
- */
-extern int strnlen_user(const void __user *str, int len);
-
-#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
-
-#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
-
+extern long __copy_from_user(void *to, const void __user *from, unsigned long n);
+extern long __copy_to_user(void __user *to, const void *from, unsigned long n);
+extern long __strncpy_from_user(char *dst, const char __user *src, long count);
+extern long __strnlen_user(const void __user *str, long len);
+extern unsigned long __clear_user(void __user *mem, unsigned long len);
+static inline int __access_ok(unsigned long addr, unsigned long size);
+
+/* Teach asm-generic/uaccess.h that we have C functions for these. */
+#define __access_ok __access_ok
+#define __clear_user __clear_user
+#define __copy_to_user __copy_to_user
+#define __copy_from_user __copy_from_user
+#define __strnlen_user __strnlen_user
+#define __strncpy_from_user __strncpy_from_user
 #define __copy_to_user_inatomic __copy_to_user
 #define __copy_from_user_inatomic __copy_from_user
 
-#define __get_user(x, ptr) \
-({ \
-	const __typeof__(*(ptr)) __user *__private_ptr = (ptr);	\
-	__typeof__(x) __private_val;			\
-	int __private_ret = -EFAULT;			\
-	(x) = (__typeof__(*(__private_ptr)))0;				\
-	if (__copy_from_user((__force void *)&__private_val, (__private_ptr),\
-			     sizeof(*(__private_ptr))) == 0) {		\
-		(x) = (__typeof__(*(__private_ptr))) __private_val;	\
-		__private_ret = 0;					\
-	}								\
-	__private_ret;							\
-}) 
-
-#define get_user(x, ptr) \
-({ \
-        const __typeof__((*(ptr))) __user *private_ptr = (ptr); \
-        (access_ok(VERIFY_READ, private_ptr, sizeof(*private_ptr)) ? \
-	 __get_user(x, private_ptr) : ((x) = (__typeof__(*ptr))0, -EFAULT)); \
-})
-
-#define __put_user(x, ptr) \
-({ \
-        __typeof__(*(ptr)) __user *__private_ptr = ptr; \
-        __typeof__(*(__private_ptr)) __private_val; \
-        int __private_ret = -EFAULT; \
-        __private_val = (__typeof__(*(__private_ptr))) (x); \
-        if (__copy_to_user((__private_ptr), &__private_val, \
-			   sizeof(*(__private_ptr))) == 0) { \
-		__private_ret = 0; \
-	} \
-        __private_ret; \
-})
-
-#define put_user(x, ptr) \
-({ \
-        __typeof__(*(ptr)) __user *private_ptr = (ptr); \
-        (access_ok(VERIFY_WRITE, private_ptr, sizeof(*private_ptr)) ? \
-	 __put_user(x, private_ptr) : -EFAULT); \
-})
-
-#define strlen_user(str) strnlen_user(str, ~0U >> 1)
+#include <asm-generic/uaccess.h>
 
-struct exception_table_entry
+static inline int __access_ok(unsigned long addr, unsigned long size)
 {
-        unsigned long insn;
-	unsigned long fixup;
-};
+	return __addr_range_nowrap(addr, size) &&
+		(__under_task_size(addr, size) ||
+		__access_ok_vsyscall(addr, size) ||
+		segment_eq(get_fs(), KERNEL_DS));
+}
 
 #endif
diff --git a/kernel/arch/um/include/shared/init.h b/kernel/arch/um/include/shared/init.h
index b3906f860..233e2593e 100644
--- a/kernel/arch/um/include/shared/init.h
+++ b/kernel/arch/um/include/shared/init.h
@@ -40,28 +40,8 @@
 typedef int (*initcall_t)(void);
 typedef void (*exitcall_t)(void);
 
-#ifndef __KERNEL__
-#ifndef __section
-# define __section(S) __attribute__ ((__section__(#S)))
-#endif
-
-#if __GNUC__ == 3
-
-#if __GNUC_MINOR__ >= 3
-# define __used			__attribute__((__used__))
-#else
-# define __used			__attribute__((__unused__))
-#endif
-
-#else
-#if __GNUC__ == 4
-# define __used			__attribute__((__used__))
-#endif
-#endif
-
-#else
 #include <linux/compiler.h>
-#endif
+
 /* These are for everybody (although not all archs will actually
    discard it in modules) */
 #define __init		__section(.init.text)
@@ -131,7 +111,7 @@ extern struct uml_param __uml_setup_start, __uml_setup_end;
 #define __uml_postsetup_call	__used __section(.uml.postsetup.init)
 #define __uml_exit_call		__used __section(.uml.exitcall.exit)
 
-#ifndef __KERNEL__
+#ifdef __UM_HOST__
 
 #define __define_initcall(level,fn) \
 	static initcall_t __initcall_##fn __used \
diff --git a/kernel/arch/um/include/shared/kern_util.h b/kernel/arch/um/include/shared/kern_util.h
index 83a91f976..35ab97e4b 100644
--- a/kernel/arch/um/include/shared/kern_util.h
+++ b/kernel/arch/um/include/shared/kern_util.h
@@ -22,7 +22,8 @@ extern int kmalloc_ok;
 extern unsigned long alloc_stack(int order, int atomic);
 extern void free_stack(unsigned long stack, int order);
 
-extern int do_signal(void);
+struct pt_regs;
+extern void do_signal(struct pt_regs *regs);
 extern void interrupt_end(void);
 extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs);
 
diff --git a/kernel/arch/um/include/shared/os.h b/kernel/arch/um/include/shared/os.h
index d824528f6..868e6c3f8 100644
--- a/kernel/arch/um/include/shared/os.h
+++ b/kernel/arch/um/include/shared/os.h
@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
+ * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
@@ -183,6 +185,7 @@ extern int create_mem_file(unsigned long long len);
 /* process.c */
 extern unsigned long os_process_pc(int pid);
 extern int os_process_parent(int pid);
+extern void os_alarm_process(int pid);
 extern void os_stop_process(int pid);
 extern void os_kill_process(int pid, int reap_child);
 extern void os_kill_ptraced_process(int pid, int reap_child);
@@ -217,7 +220,7 @@ extern int set_umid(char *name);
 extern char *get_umid(void);
 
 /* signal.c */
-extern void timer_init(void);
+extern void timer_set_signal_handler(void);
 extern void set_sigstack(void *sig_stack, int size);
 extern void remove_sigstack(void);
 extern void set_handler(int sig);
@@ -227,6 +230,7 @@ extern void unblock_signals(void);
 extern int get_signals(void);
 extern int set_signals(int enable);
 extern int os_is_signal_stack(void);
+extern void deliver_alarm(void);
 
 /* util.c */
 extern void stack_protections(unsigned long address);
@@ -238,12 +242,16 @@ extern void um_early_printk(const char *s, unsigned int n);
 extern void os_fix_helper_signals(void);
 
 /* time.c */
-extern void idle_sleep(unsigned long long nsecs);
-extern int set_interval(void);
-extern int timer_one_shot(int ticks);
-extern long long disable_timer(void);
+extern void os_idle_sleep(unsigned long long nsecs);
+extern int os_timer_create(void* timer);
+extern int os_timer_set_interval(void* timer, void* its);
+extern int os_timer_one_shot(int ticks);
+extern long long os_timer_disable(void);
+extern long os_timer_remain(void* timer);
 extern void uml_idle_timer(void);
+extern long long os_persistent_clock_emulation(void);
 extern long long os_nsecs(void);
+extern long long os_vnsecs(void);
 
 /* skas/mem.c */
 extern long run_syscall_stub(struct mm_id * mm_idp,
@@ -274,6 +282,7 @@ extern void initial_thread_cb_skas(void (*proc)(void *),
 				 void *arg);
 extern void halt_skas(void);
 extern void reboot_skas(void);
+extern int get_syscall(struct uml_pt_regs *regs);
 
 /* irq.c */
 extern int os_waiting_for_events(struct irq_fd *active_fds);
@@ -301,4 +310,6 @@ extern int get_pty(void);
 /* sys-$ARCH/task_size.c */
 extern unsigned long os_get_top_address(void);
 
+long syscall(long number, ...);
+
 #endif
diff --git a/kernel/arch/um/include/shared/skas/stub-data.h b/kernel/arch/um/include/shared/skas/stub-data.h
index f6ed92c37..a9deece95 100644
--- a/kernel/arch/um/include/shared/skas/stub-data.h
+++ b/kernel/arch/um/include/shared/skas/stub-data.h
@@ -1,4 +1,6 @@
 /*
+
+ * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
  * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
@@ -6,12 +8,11 @@
 #ifndef __STUB_DATA_H
 #define __STUB_DATA_H
 
-#include <sys/time.h>
+#include <time.h>
 
 struct stub_data {
-	long offset;
+	unsigned long offset;
 	int fd;
-	struct itimerval timer;
 	long err;
 };
 
diff --git a/kernel/arch/um/include/shared/timer-internal.h b/kernel/arch/um/include/shared/timer-internal.h
new file mode 100644
index 000000000..03e6f217f
--- /dev/null
+++ b/kernel/arch/um/include/shared/timer-internal.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2012 - 2014 Cisco Systems
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __TIMER_INTERNAL_H__
+#define __TIMER_INTERNAL_H__
+
+#define TIMER_MULTIPLIER 256
+#define TIMER_MIN_DELTA  500
+
+#endif
diff --git a/kernel/arch/um/include/shared/user.h b/kernel/arch/um/include/shared/user.h
index cef068563..4cff19f62 100644
--- a/kernel/arch/um/include/shared/user.h
+++ b/kernel/arch/um/include/shared/user.h
@@ -17,7 +17,7 @@
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
 /* This is to get size_t */
-#ifdef __KERNEL__
+#ifndef __UM_HOST__
 #include <linux/types.h>
 #else
 #include <stddef.h>