arch/arm/include/asm/vdso/vsyscall.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_VDSO_VSYSCALL_H
   3 #define __ASM_VDSO_VSYSCALL_H
   4
   5 #ifndef __ASSEMBLY__
   6
   7 #include <linux/timekeeper_internal.h>
   8 #include <vdso/datapage.h>
   9 #include <asm/cacheflush.h>
  10
  11 extern struct vdso_data *vdso_data;
  12 extern bool cntvct_ok;
  13
  14 /*
  15  * Update the vDSO data page to keep in sync with kernel timekeeping.
  16  */
  17 static __always_inline
  18 struct vdso_data *__arm_get_k_vdso_data(void)
  19 {
  20         return vdso_data;
  21 }
  22 #define __arch_get_k_vdso_data __arm_get_k_vdso_data
  23
  24 static __always_inline
  25 void __arm_sync_vdso_data(struct vdso_data *vdata)
  26 {
  27         flush_dcache_page(virt_to_page(vdata));
  28 }
  29 #define __arch_sync_vdso_data __arm_sync_vdso_data
  30
  31 /* The asm-generic header needs to be included after the definitions above */
  32 #include <asm-generic/vdso/vsyscall.h>
  33
  34 #endif /* !__ASSEMBLY__ */
  35
  36 #endif /* __ASM_VDSO_VSYSCALL_H */