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>

6 files changed, 17 insertions, 16 deletions

diff --git a/kernel/arch/x86/um/asm/barrier.h b/kernel/arch/x86/um/asm/barrier.h
index 7e8a1a650..755481f14 100644
--- a/kernel/arch/x86/um/asm/barrier.h
+++ b/kernel/arch/x86/um/asm/barrier.h
@@ -39,22 +39,10 @@
 #define smp_mb()	barrier()
 #define smp_rmb()	barrier()
 #define smp_wmb()	barrier()
-#define set_mb(var, value) do { var = value; barrier(); } while (0)
+
+#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); barrier(); } while (0)
 
 #define read_barrier_depends()		do { } while (0)
 #define smp_read_barrier_depends()	do { } while (0)
 
-/*
- * Stop RDTSC speculation. This is needed when you need to use RDTSC
- * (or get_cycles or vread that possibly accesses the TSC) in a defined
- * code region.
- *
- * (Could use an alternative three way for this if there was one.)
- */
-static inline void rdtsc_barrier(void)
-{
-	alternative_2("", "mfence", X86_FEATURE_MFENCE_RDTSC,
-			  "lfence", X86_FEATURE_LFENCE_RDTSC);
-}
-
 #endif
diff --git a/kernel/arch/x86/um/asm/checksum.h b/kernel/arch/x86/um/asm/checksum.h
index 4b181b744..ee940185e 100644
--- a/kernel/arch/x86/um/asm/checksum.h
+++ b/kernel/arch/x86/um/asm/checksum.h
@@ -3,6 +3,7 @@
 
 #include <linux/string.h>
 #include <linux/in6.h>
+#include <linux/uaccess.h>
 
 /*
  * computes the checksum of a memory block at buff, length len,
diff --git a/kernel/arch/x86/um/asm/elf.h b/kernel/arch/x86/um/asm/elf.h
index 0a656b727..548197212 100644
--- a/kernel/arch/x86/um/asm/elf.h
+++ b/kernel/arch/x86/um/asm/elf.h
@@ -200,8 +200,6 @@ typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 
 typedef struct user_i387_struct elf_fpregset_t;
 
-#define task_pt_regs(t) (&(t)->thread.regs)
-
 struct task_struct;
 
 extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
diff --git a/kernel/arch/x86/um/asm/processor.h b/kernel/arch/x86/um/asm/processor.h
index 2a206d2b1..233ee09c1 100644
--- a/kernel/arch/x86/um/asm/processor.h
+++ b/kernel/arch/x86/um/asm/processor.h
@@ -28,6 +28,8 @@ static inline void rep_nop(void)
 #define cpu_relax()		rep_nop()
 #define cpu_relax_lowlatency()	cpu_relax()
 
+#define task_pt_regs(t) (&(t)->thread.regs)
+
 #include <asm/processor-generic.h>
 
 #endif
diff --git a/kernel/arch/x86/um/asm/segment.h b/kernel/arch/x86/um/asm/segment.h
index 45183fcd1..41dd5e1f3 100644
--- a/kernel/arch/x86/um/asm/segment.h
+++ b/kernel/arch/x86/um/asm/segment.h
@@ -7,4 +7,12 @@ extern int host_gdt_entry_tls_min;
 #define GDT_ENTRY_TLS_MIN host_gdt_entry_tls_min
 #define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
 
+typedef struct {
+	unsigned long seg;
+} mm_segment_t;
+
+#define MAKE_MM_SEG(s)	((mm_segment_t) { (s) })
+#define KERNEL_DS	MAKE_MM_SEG(~0UL)
+#define USER_DS		MAKE_MM_SEG(TASK_SIZE)
+
 #endif
diff --git a/kernel/arch/x86/um/asm/syscall.h b/kernel/arch/x86/um/asm/syscall.h
index 9fe77b7b5..81d6562ce 100644
--- a/kernel/arch/x86/um/asm/syscall.h
+++ b/kernel/arch/x86/um/asm/syscall.h
@@ -3,6 +3,10 @@
 
 #include <uapi/linux/audit.h>
 
+typedef asmlinkage long (*sys_call_ptr_t)(unsigned long, unsigned long,
+					  unsigned long, unsigned long,
+					  unsigned long, unsigned long);
+
 static inline int syscall_get_arch(void)
 {
 #ifdef CONFIG_X86_32