percpu: add __percpu to SHIFT_PERCPU_PTR

The SHIFT_PERCPU_PTR() returns a pointer used by a number
of functions that expect the pointer to be __percpu annotated
(sparse address space 3). Adding __percpu to this makes the
following sparse warnings go away.

Note, this then creates the problem the __percup is marked
as noderef, which may need removing for some of the internal
functions, or to remove other warnings.

mm/vmstat.c:385:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:385:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:385:13:    got signed char *
mm/vmstat.c:385:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:385:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:385:13:    got signed char *
mm/vmstat.c:385:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:385:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:385:13:    got signed char *
mm/vmstat.c:385:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:385:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:385:13:    got signed char *
mm/vmstat.c:401:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:401:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:401:13:    got signed char *
mm/vmstat.c:401:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:401:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:401:13:    got signed char *
mm/vmstat.c:401:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:401:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:401:13:    got signed char *
mm/vmstat.c:401:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:401:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:401:13:    got signed char *
mm/vmstat.c:429:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:429:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:429:13:    got signed char *
mm/vmstat.c:429:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:429:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:429:13:    got signed char *
mm/vmstat.c:429:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:429:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:429:13:    got signed char *
mm/vmstat.c:429:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:429:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:429:13:    got signed char *
mm/vmstat.c:445:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:445:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:445:13:    got signed char *
mm/vmstat.c:445:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:445:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:445:13:    got signed char *
mm/vmstat.c:445:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:445:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:445:13:    got signed char *
mm/vmstat.c:445:13: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:445:13:    expected signed char [noderef] [usertype] <asn:3> *__p
mm/vmstat.c:445:13:    got signed char *
mm/vmstat.c:763:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:763:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:763:29:    got signed char *
mm/vmstat.c:763:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:763:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:763:29:    got signed char *
mm/vmstat.c:763:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:763:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:763:29:    got signed char *
mm/vmstat.c:763:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:763:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:763:29:    got signed char *
mm/vmstat.c:825:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:825:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:825:29:    got signed char *
mm/vmstat.c:825:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:825:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:825:29:    got signed char *
mm/vmstat.c:825:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:825:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:825:29:    got signed char *
mm/vmstat.c:825:29: warning: incorrect type in initializer (different address spaces)
mm/vmstat.c:825:29:    expected signed char [noderef] <asn:3> *__p
mm/vmstat.c:825:29:    got signed char *

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Dennis Zhou <dennis@kernel.org>

diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index a6fabd8..a49b6c7 100644 (file)
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -229,7 +229,7 @@ do {                                                                        \
  * pointer value.  The weird cast keeps both GCC and sparse happy.
  */
 #define SHIFT_PERCPU_PTR(__p, __offset)                                        \
-       RELOC_HIDE((typeof(*(__p)) __kernel __force *)(__p), (__offset))
+       RELOC_HIDE((typeof(*(__p)) __kernel __percpu __force *)(__p), (__offset))
 
 #define per_cpu_ptr(ptr, cpu)                                          \
 ({                                                                     \