forked from luck/tmp_suning_uos_patched
46d075be58
Change2d1b202762("powerpc: Fixup lwsync at runtime") removed __SUBARCH_HAS_LWSYNC, causing smp_wmb to revert back to eieio for all CPUs. This restores the behaviour intorduced in74f0609526("powerpc: Optimise smp_wmb on 64-bit processors"). Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
#ifndef _ASM_POWERPC_SYNCH_H
|
|
#define _ASM_POWERPC_SYNCH_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/stringify.h>
|
|
#include <asm/feature-fixups.h>
|
|
|
|
#if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC)
|
|
#define __SUBARCH_HAS_LWSYNC
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
extern unsigned int __start___lwsync_fixup, __stop___lwsync_fixup;
|
|
extern void do_lwsync_fixups(unsigned long value, void *fixup_start,
|
|
void *fixup_end);
|
|
|
|
static inline void eieio(void)
|
|
{
|
|
__asm__ __volatile__ ("eieio" : : : "memory");
|
|
}
|
|
|
|
static inline void isync(void)
|
|
{
|
|
__asm__ __volatile__ ("isync" : : : "memory");
|
|
}
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#if defined(__powerpc64__)
|
|
# define LWSYNC lwsync
|
|
#elif defined(CONFIG_E500)
|
|
# define LWSYNC \
|
|
START_LWSYNC_SECTION(96); \
|
|
sync; \
|
|
MAKE_LWSYNC_SECTION_ENTRY(96, __lwsync_fixup);
|
|
#else
|
|
# define LWSYNC sync
|
|
#endif
|
|
|
|
#ifdef CONFIG_SMP
|
|
#define ISYNC_ON_SMP "\n\tisync\n"
|
|
#define LWSYNC_ON_SMP stringify_in_c(LWSYNC) "\n"
|
|
#else
|
|
#define ISYNC_ON_SMP
|
|
#define LWSYNC_ON_SMP
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_SYNCH_H */
|