[PATCH] replace 'hlt' by 'ud2' in i386/x32/x86_64 a_crash implementations

[Alexander Monakov <amonakov@ispras.ru>]

---
ud2 is also what GCC and Clang use to implement __builtin_trap()

ud2 causes SIGILL rather than SIGSEGV; SIGSEGV is more likely to have a custom
signal handler installed

 arch/i386/atomic.h   | 2 +-
 arch/x32/atomic.h    | 2 +-
 arch/x86_64/atomic.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/i386/atomic.h b/arch/i386/atomic.h
index 4fe7bde..2f78d31 100644
--- a/arch/i386/atomic.h
+++ b/arch/i386/atomic.h
@@ -103,7 +103,7 @@ static inline void a_barrier()
 
 static inline void a_crash()
 {
-	__asm__ __volatile__( "hlt" : : : "memory" );
+	__asm__ __volatile__( "ud2" : : : "memory" );
 }
 
 
diff --git a/arch/x32/atomic.h b/arch/x32/atomic.h
index 333098c..a8e7603 100644
--- a/arch/x32/atomic.h
+++ b/arch/x32/atomic.h
@@ -98,7 +98,7 @@ static inline void a_barrier()
 
 static inline void a_crash()
 {
-	__asm__ __volatile__( "hlt" : : : "memory" );
+	__asm__ __volatile__( "ud2" : : : "memory" );
 }
 
 
diff --git a/arch/x86_64/atomic.h b/arch/x86_64/atomic.h
index 333098c..a8e7603 100644
--- a/arch/x86_64/atomic.h
+++ b/arch/x86_64/atomic.h
@@ -98,7 +98,7 @@ static inline void a_barrier()
 
 static inline void a_crash()
 {
-	__asm__ __volatile__( "hlt" : : : "memory" );
+	__asm__ __volatile__( "ud2" : : : "memory" );
 }
 
 
-- 
2.1.3