remove unused barrier.h

While looking for things that needs porting for Aarch64,
barrier.h from blktrace was identified. However, a deeper
look shows that this file is not actually used anymore
in blktrace.

Remove unused file to avoid future confusion.

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/barrier.h b/barrier.h
deleted file mode 100644 (file)
index 14d06b5..0000000
--- a/barrier.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BARRIER_H
-#define BARRIER_H
-
-#if defined(__ia64__)
-  #define store_barrier()         asm volatile ("mf" ::: "memory")
-#elif defined(__x86_64__)
-  #define store_barrier()         asm volatile("sfence" ::: "memory")
-#elif defined(__i386__)
-  #define store_barrier()         asm volatile ("": : :"memory")
-#elif defined(__ppc__) || defined(__powerpc__)
-  #define store_barrier()         asm volatile ("eieio" : : : "memory")
-#elif defined(__s390__) || defined(__s390x__)
-  #define store_barrier()         asm volatile ("bcr 15,0" : : : "memory")
-#elif defined(__alpha__)
-  #define store_barrier()         asm volatile("wmb": : :"memory")
-#elif defined(__hppa__)
-  #define store_barrier()         asm volatile("":::"memory")
-#elif defined(__sparc__)
-  #define store_barrier()         asm volatile("":::"memory")
-#elif defined(__m68000__) || defined(__m68k__) || defined(mc68000) || defined(_M_M68K)
-  #define store_barrier()         asm volatile("":::"memory")
-#elif defined(__mips__)  /* also mipsel */
-  #define store_barrier()         do { } while(0)
-#elif defined(__arm__)
-  /* taken from linux/arch/arm/kernel/entry-armv.S, thanks to pbrook! */
-  typedef void (__kernel_dmb_t)(void);
-  #define __kernel_dmb (*(__kernel_dmb_t *)0xffff0fa0)
-  #define store_barrier()        __kernel_dmb()
-#else
-  #error Define store_barrier() for your CPU
-#endif
-
-#endif