arm64: vdso32: Include common headers in the vdso library

The vDSO library should only include the necessary headers required for
a userspace library (UAPI and a minimal set of kernel headers). To make
this possible it is necessary to isolate from the kernel headers the
common parts that are strictly necessary to build the library.

Refactor the vdso32 implementation to include common headers.

Signed-off-by: Vincenzo Frascino <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

Author: fvincenzo

arch/arm64/include/asm/vdso/compat_gettimeofday.h

@@ -8,7 +8,7 @@
 #ifndef __ASSEMBLY__
 
 #include <asm/unistd.h>
-#include <uapi/linux/time.h>
+#include <asm/errno.h>
 
 #include <asm/vdso/compat_barrier.h>
 

arch/arm64/kernel/vdso32/vgettimeofday.c

@@ -5,8 +5,6 @@
  * Copyright (C) 2018 ARM Limited
  *
  */
-#include <linux/time.h>
-#include <linux/types.h>
 
 int __vdso_clock_gettime(clockid_t clock,
 			 struct old_timespec32 *ts)