forked from luck/tmp_suning_uos_patched
9f54ad6652
asm/xen/hypercall.h, asm/xen/hypervisor.h, asm/xen/interface.h and asm/xen/page.h are identical so to avoid code duplication we are just including the original arm header files here. asm/xen/events.h is slightly different, so introduce a different file here (use xchg to implement xchg_xen_ulong and pass regs->pstate to raw_irqs_disabled_flags). Also introduce asm/hypervisor.h and asm/sync_bitops.h. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>
27 lines
1.1 KiB
C
27 lines
1.1 KiB
C
#ifndef __ASM_SYNC_BITOPS_H__
|
|
#define __ASM_SYNC_BITOPS_H__
|
|
|
|
#include <asm/bitops.h>
|
|
#include <asm/cmpxchg.h>
|
|
|
|
/* sync_bitops functions are equivalent to the SMP implementation of the
|
|
* original functions, independently from CONFIG_SMP being defined.
|
|
*
|
|
* We need them because _set_bit etc are not SMP safe if !CONFIG_SMP. But
|
|
* under Xen you might be communicating with a completely external entity
|
|
* who might be on another CPU (e.g. two uniprocessor guests communicating
|
|
* via event channels and grant tables). So we need a variant of the bit
|
|
* ops which are SMP safe even on a UP kernel.
|
|
*/
|
|
|
|
#define sync_set_bit(nr, p) set_bit(nr, p)
|
|
#define sync_clear_bit(nr, p) clear_bit(nr, p)
|
|
#define sync_change_bit(nr, p) change_bit(nr, p)
|
|
#define sync_test_and_set_bit(nr, p) test_and_set_bit(nr, p)
|
|
#define sync_test_and_clear_bit(nr, p) test_and_clear_bit(nr, p)
|
|
#define sync_test_and_change_bit(nr, p) test_and_change_bit(nr, p)
|
|
#define sync_test_bit(nr, addr) test_bit(nr, addr)
|
|
#define sync_cmpxchg cmpxchg
|
|
|
|
#endif
|