android_kernel_xiaomi_sm8350/include/asm-powerpc/synch.h
Arnd Bergmann 88ced03149 [PATCH] powerpc: sanitize header files for user space includes
include/asm-ppc/ had #ifdef __KERNEL__ in all header files that
are not meant for use by user space, include/asm-powerpc does
not have this yet.

This patch gets us a lot closer there. There are a few cases
where I was not sure, so I left them out. I have verified
that no CONFIG_* symbols are used outside of __KERNEL__
any more and that there are no obvious compile errors when
including any of the headers in user space libraries.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09 15:13:08 +11:00

52 lines
1.0 KiB
C

#ifndef _ASM_POWERPC_SYNCH_H
#define _ASM_POWERPC_SYNCH_H
#ifdef __KERNEL__
#ifdef __powerpc64__
#define __SUBARCH_HAS_LWSYNC
#endif
#ifdef __SUBARCH_HAS_LWSYNC
# define LWSYNC lwsync
#else
# define LWSYNC sync
#endif
/*
* Arguably the bitops and *xchg operations don't imply any memory barrier
* or SMP ordering, but in fact a lot of drivers expect them to imply
* both, since they do on x86 cpus.
*/
#ifdef CONFIG_SMP
#define EIEIO_ON_SMP "eieio\n"
#define ISYNC_ON_SMP "\n\tisync"
#define SYNC_ON_SMP __stringify(LWSYNC) "\n"
#else
#define EIEIO_ON_SMP
#define ISYNC_ON_SMP
#define SYNC_ON_SMP
#endif
static inline void eieio(void)
{
__asm__ __volatile__ ("eieio" : : : "memory");
}
static inline void isync(void)
{
__asm__ __volatile__ ("isync" : : : "memory");
}
#ifdef CONFIG_SMP
#define eieio_on_smp() eieio()
#define isync_on_smp() isync()
#else
#define eieio_on_smp() __asm__ __volatile__("": : :"memory")
#define isync_on_smp() __asm__ __volatile__("": : :"memory")
#endif
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_SYNCH_H */