mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 00:21:59 +00:00
88ced03149
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>
52 lines
1.0 KiB
C
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 */
|
|
|