Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM updates from Russell King:
 "First ARM push of this merge window, post me coming back from holiday.
  This is what has been in linux-next for the last few weeks.  Not much
  to say which isn't described by the commit summaries."

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (32 commits)
  ARM: 7463/1: topology: Update cpu_power according to DT information
  ARM: 7462/1: topology: factorize the update of sibling masks
  ARM: 7461/1: topology: Add arch_scale_freq_power function
  ARM: 7456/1: ptrace: provide separate functions for tracing syscall {entry,exit}
  ARM: 7455/1: audit: move syscall auditing until after ptrace SIGTRAP handling
  ARM: 7454/1: entry: don't bother with syscall tracing on ret_from_fork path
  ARM: 7453/1: audit: only allow syscall auditing for pure EABI userspace
  ARM: 7452/1: delay: allow timer-based delay implementation to be selected
  ARM: 7451/1: arch timer: implement read_current_timer and get_cycles
  ARM: 7450/1: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs
  ARM: 7449/1: use generic strnlen_user and strncpy_from_user functions
  ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration
  ARM: 7447/1: rwlocks: remove unused branch labels from trylock routines
  ARM: 7446/1: spinlock: use ticket algorithm for ARMv6+ locking implementation
  ARM: 7445/1: mm: update CONTEXTIDR register to contain PID of current process
  ARM: 7444/1: kernel: add arch-timer C3STOP feature
  ARM: 7460/1: remove asm/locks.h
  ARM: 7439/1: head.S: simplify initial page table mapping
  ARM: 7437/1: zImage: Allow DTB command line concatenation with ATAG_CMDLINE
  ARM: 7436/1: Do not map the vectors page as write-through on UP systems
  ...

1 files changed, 24 insertions, 10 deletions

diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 14e38261cd31..dab711e6e1ca 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -907,16 +907,16 @@ long arch_ptrace(struct task_struct *child, long request,
         return ret;
 }
 
-asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
+enum ptrace_syscall_dir {
+        PTRACE_SYSCALL_ENTER = 0,
+        PTRACE_SYSCALL_EXIT,
+};
+
+static int ptrace_syscall_trace(struct pt_regs *regs, int scno,
+                                enum ptrace_syscall_dir dir)
 {
         unsigned long ip;
 
-        if (why)
-                audit_syscall_exit(regs);
-        else
-                audit_syscall_entry(AUDIT_ARCH_ARM, scno, regs->ARM_r0,
-                                    regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
-
         if (!test_thread_flag(TIF_SYSCALL_TRACE))
                 return scno;
 
@@ -927,14 +927,28 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
          * IP = 0 -> entry, =1 -> exit
          */
         ip = regs->ARM_ip;
-        regs->ARM_ip = why;
+        regs->ARM_ip = dir;
 
-        if (why)
+        if (dir == PTRACE_SYSCALL_EXIT)
                 tracehook_report_syscall_exit(regs, 0);
         else if (tracehook_report_syscall_entry(regs))
                 current_thread_info()->syscall = -1;
 
         regs->ARM_ip = ip;
-
         return current_thread_info()->syscall;
 }
+
+asmlinkage int syscall_trace_enter(struct pt_regs *regs, int scno)
+{
+        int ret = ptrace_syscall_trace(regs, scno, PTRACE_SYSCALL_ENTER);
+        audit_syscall_entry(AUDIT_ARCH_ARM, scno, regs->ARM_r0, regs->ARM_r1,
+                            regs->ARM_r2, regs->ARM_r3);
+        return ret;
+}
+
+asmlinkage int syscall_trace_exit(struct pt_regs *regs, int scno)
+{
+        int ret = ptrace_syscall_trace(regs, scno, PTRACE_SYSCALL_EXIT);
+        audit_syscall_exit(regs);
+        return ret;
+}