1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef __ASM_SYSTEM_H 13 #define __ASM_SYSTEM_H 14 15 #include <linux/kernel.h> 16 #include <asm/segment.h> 17 #include <asm/cpufeature.h> 18 #include <asm/cmpxchg.h> 19 20 #define nop() __asm__ __volatile__ ("nop") 21 #define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2) 22 #define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2) 23 #define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM) 24 #define read_barrier_depends() do { } while(0) 25 #define smp_mb() barrier() 26 #define smp_rmb() barrier() 27 #define smp_wmb() barrier() 28 #define smp_read_barrier_depends() do { } while(0) 29 #define set_mb(var, value) do { var = value; barrier(); } while (0) 30 #include <linux/irqflags.h> 31 #define HAVE_DISABLE_HLT 32 33 #endif 34
