Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel

Pull Hexagon fixes from Richard Kuo:
 "Changes for the Hexagon architecture (and one touching OpenRISC).

  They include various fixes to make use of additional arch features and
  cleanups.  The largest functional change is a cleanup of the signal
  and event return paths"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel: (32 commits)
  Hexagon: add v4 CS regs to core copyout macro
  Hexagon: use correct translation for VMALLOC_START
  Hexagon: use correct translations for DMA mappings
  Hexagon: fix return value for notify_resume case in do_work_pending
  Hexagon: fix signal number for user mem faults
  Hexagon: remove two Kconfig entries
  arch: remove CONFIG_GENERIC_FIND_NEXT_BIT again
  Hexagon: update copyright dates
  Hexagon: add translation types for __vmnewmap
  Hexagon: fix signal.c compile error
  Hexagon: break up user fn/arg register setting
  Hexagon: use generic sys_fork, sys_vfork, and sys_clone
  Hexagon: fix psp/sp macro
  Hexagon: fix up int enable/disable at ret_from_fork
  Hexagon: add IOMEM and _relaxed IO macros
  Hexagon: switch to using the device type for IO mappings
  Hexagon: don't print info for offline CPU's
  Hexagon: add support for single-stepping (v4+)
  Hexagon: use correct work mask when checking for more work
  Hexagon: add support for additional exceptions
  ...

1 files changed, 25 insertions, 1 deletions

diff --git a/arch/hexagon/kernel/ptrace.c b/arch/hexagon/kernel/ptrace.c
index 670b1b0bee63..de829eb7f185 100644
--- a/arch/hexagon/kernel/ptrace.c
+++ b/arch/hexagon/kernel/ptrace.c
@@ -1,7 +1,7 @@
 /*
  * Ptrace support for Hexagon
  *
- * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -32,6 +32,21 @@
 
 #include <asm/user.h>
 
+#if arch_has_single_step()
+/*  Both called from ptrace_resume  */
+void user_enable_single_step(struct task_struct *child)
+{
+	pt_set_singlestep(task_pt_regs(child));
+	set_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+	pt_clr_singlestep(task_pt_regs(child));
+	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+#endif
+
 static int genregs_get(struct task_struct *target,
 		   const struct user_regset *regset,
 		   unsigned int pos, unsigned int count,
@@ -76,6 +91,10 @@ static int genregs_get(struct task_struct *target,
 	dummy = pt_cause(regs);
 	ONEXT(&dummy, cause);
 	ONEXT(&pt_badva(regs), badva);
+#if CONFIG_HEXAGON_ARCH_VERSION >=4
+	ONEXT(&regs->cs0, cs0);
+	ONEXT(&regs->cs1, cs1);
+#endif
 
 	/* Pad the rest with zeros, if needed */
 	if (!ret)
@@ -123,6 +142,11 @@ static int genregs_set(struct task_struct *target,
 	INEXT(&bucket, cause);
 	INEXT(&bucket, badva);
 
+#if CONFIG_HEXAGON_ARCH_VERSION >=4
+	INEXT(&regs->cs0, cs0);
+	INEXT(&regs->cs1, cs1);
+#endif
+
 	/* Ignore the rest, if needed */
 	if (!ret)
 		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,