Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef _ASM_UM_BARRIER_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _ASM_UM_BARRIER_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <asm/alternative.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Force strict CPU ordering.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * And yes, this is required on UP too when we're talking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * to devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #ifdef CONFIG_X86_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define mb()	alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define rmb()	alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define wmb()	alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #else /* CONFIG_X86_32 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define mb()	asm volatile("mfence" : : : "memory")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define rmb()	asm volatile("lfence" : : : "memory")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define wmb()	asm volatile("sfence" : : : "memory")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #endif /* CONFIG_X86_32 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm-generic/barrier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #endif