5 files changed, 42 insertions, 43 deletions

diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h
index 8786e01e0db8..969570167e9e 100644
--- a/include/asm-generic/siginfo.h
+++ b/include/asm-generic/siginfo.h
@@ -199,6 +199,8 @@ typedef struct siginfo {
  */
 #define TRAP_BRKPT      (__SI_FAULT|1)  /* process breakpoint */
 #define TRAP_TRACE      (__SI_FAULT|2)  /* process trace trap */
+#define TRAP_BRANCH     (__SI_FAULT|3)  /* process taken branch trap */
+#define TRAP_HWBKPT     (__SI_FAULT|4)  /* hardware breakpoint/watchpoint */
 #define NSIGTRAP        2
 
 /*
diff --git a/include/asm-parisc/siginfo.h b/include/asm-parisc/siginfo.h
index d4909f55fe35..d7034728f377 100644
--- a/include/asm-parisc/siginfo.h
+++ b/include/asm-parisc/siginfo.h
@@ -3,11 +3,6 @@
 
 #include <asm-generic/siginfo.h>
 
-/*
- * SIGTRAP si_codes
- */
-#define TRAP_BRANCH     (__SI_FAULT|3)  /* process taken branch trap */
-#define TRAP_HWBKPT     (__SI_FAULT|4)  /* hardware breakpoint or watchpoint */
 #undef NSIGTRAP
 #define NSIGTRAP        4
 
diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h
index d64a61097165..ac578f11c1c5 100644
--- a/include/asm-x86/ptrace.h
+++ b/include/asm-x86/ptrace.h
@@ -177,11 +177,11 @@ convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
 
 #ifdef CONFIG_X86_32
 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
-                         int error_code);
-#else
-void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
+                         int error_code, int si_code);
 #endif
 
+void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
+
 extern long syscall_trace_enter(struct pt_regs *);
 extern void syscall_trace_leave(struct pt_regs *);
 
diff --git a/include/asm-x86/spinlock.h b/include/asm-x86/spinlock.h
index 8badab09146b..157ff7fab97a 100644
--- a/include/asm-x86/spinlock.h
+++ b/include/asm-x86/spinlock.h
@@ -21,8 +21,10 @@
 
 #ifdef CONFIG_X86_32
 # define LOCK_PTR_REG "a"
+# define REG_PTR_MODE "k"
 #else
 # define LOCK_PTR_REG "D"
+# define REG_PTR_MODE "q"
 #endif
 
 #if defined(CONFIG_X86_32) && \
@@ -54,19 +56,7 @@
  * much between them in performance though, especially as locks are out of line.
  */
 #if (NR_CPUS < 256)
-static inline int __ticket_spin_is_locked(raw_spinlock_t *lock)
-{
-        int tmp = ACCESS_ONCE(lock->slock);
-
-        return (((tmp >> 8) & 0xff) != (tmp & 0xff));
-}
-
-static inline int __ticket_spin_is_contended(raw_spinlock_t *lock)
-{
-        int tmp = ACCESS_ONCE(lock->slock);
-
-        return (((tmp >> 8) - tmp) & 0xff) > 1;
-}
+#define TICKET_SHIFT 8
 
 static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock)
 {
@@ -89,19 +79,17 @@ static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock)
 
 static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock)
 {
-        int tmp;
-        short new;
+        int tmp, new;
 
-        asm volatile("movw %2,%w0\n\t"
+        asm volatile("movzwl %2, %0\n\t"
                      "cmpb %h0,%b0\n\t"
+                     "leal 0x100(%" REG_PTR_MODE "0), %1\n\t"
                      "jne 1f\n\t"
-                     "movw %w0,%w1\n\t"
-                     "incb %h1\n\t"
                      LOCK_PREFIX "cmpxchgw %w1,%2\n\t"
                      "1:"
                      "sete %b1\n\t"
                      "movzbl %b1,%0\n\t"
-                     : "=&a" (tmp), "=Q" (new), "+m" (lock->slock)
+                     : "=&a" (tmp), "=&q" (new), "+m" (lock->slock)
                      :
                      : "memory", "cc");
 
@@ -116,19 +104,7 @@ static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock)
                      : "memory", "cc");
 }
 #else
-static inline int __ticket_spin_is_locked(raw_spinlock_t *lock)
-{
-        int tmp = ACCESS_ONCE(lock->slock);
-
-        return (((tmp >> 16) & 0xffff) != (tmp & 0xffff));
-}
-
-static inline int __ticket_spin_is_contended(raw_spinlock_t *lock)
-{
-        int tmp = ACCESS_ONCE(lock->slock);
-
-        return (((tmp >> 16) - tmp) & 0xffff) > 1;
-}
+#define TICKET_SHIFT 16
 
 static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock)
 {
@@ -146,7 +122,7 @@ static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock)
                      /* don't need lfence here, because loads are in-order */
                      "jmp 1b\n"
                      "2:"
-                     : "+Q" (inc), "+m" (lock->slock), "=r" (tmp)
+                     : "+r" (inc), "+m" (lock->slock), "=&r" (tmp)
                      :
                      : "memory", "cc");
 }
@@ -160,13 +136,13 @@ static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock)
                      "movl %0,%1\n\t"
                      "roll $16, %0\n\t"
                      "cmpl %0,%1\n\t"
+                     "leal 0x00010000(%" REG_PTR_MODE "0), %1\n\t"
                      "jne 1f\n\t"
-                     "addl $0x00010000, %1\n\t"
                      LOCK_PREFIX "cmpxchgl %1,%2\n\t"
                      "1:"
                      "sete %b1\n\t"
                      "movzbl %b1,%0\n\t"
-                     : "=&a" (tmp), "=r" (new), "+m" (lock->slock)
+                     : "=&a" (tmp), "=&q" (new), "+m" (lock->slock)
                      :
                      : "memory", "cc");
 
@@ -182,6 +158,20 @@ static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock)
 }
 #endif
 
+static inline int __ticket_spin_is_locked(raw_spinlock_t *lock)
+{
+        int tmp = ACCESS_ONCE(lock->slock);
+
+        return !!(((tmp >> TICKET_SHIFT) ^ tmp) & ((1 << TICKET_SHIFT) - 1));
+}
+
+static inline int __ticket_spin_is_contended(raw_spinlock_t *lock)
+{
+        int tmp = ACCESS_ONCE(lock->slock);
+
+        return (((tmp >> TICKET_SHIFT) - tmp) & ((1 << TICKET_SHIFT) - 1)) > 1;
+}
+
 #ifdef CONFIG_PARAVIRT
 /*
  * Define virtualization-friendly old-style lock byte lock, for use in
diff --git a/include/asm-x86/traps.h b/include/asm-x86/traps.h
index 2ccebc6fb0b0..7a692baa51ae 100644
--- a/include/asm-x86/traps.h
+++ b/include/asm-x86/traps.h
@@ -1,6 +1,8 @@
 #ifndef ASM_X86__TRAPS_H
 #define ASM_X86__TRAPS_H
 
+#include <asm/debugreg.h>
+
 /* Common in X86_32 and X86_64 */
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
@@ -36,6 +38,16 @@ void do_invalid_op(struct pt_regs *, long);
 void do_general_protection(struct pt_regs *, long);
 void do_nmi(struct pt_regs *, long);
 
+static inline int get_si_code(unsigned long condition)
+{
+        if (condition & DR_STEP)
+                return TRAP_TRACE;
+        else if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3))
+                return TRAP_HWBKPT;
+        else
+                return TRAP_BRKPT;
+}
+
 extern int panic_on_unrecovered_nmi;
 extern int kstack_depth_to_print;