[v2,06/14] sparse: add address_space __incoherent

Commit Message

Ankur Arora Oct. 20, 2021, 5:02 p.m. UTC

Some CPU architectures provide store instructions that are weakly
ordered with respect to other instructions that operate on the memory
hierarchy.
Add sparse address_space __incoherent to denote pointers used to
operate over these regions.

Signed-off-by: Ankur Arora <[e-mail]>
---
 include/linux/compiler_types.h | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index b6ff83a714ca..f7f68d7bc494 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -11,6 +11,7 @@ 
 # define __iomem	__attribute__((noderef, address_space(__iomem)))
 # define __percpu	__attribute__((noderef, address_space(__percpu)))
 # define __rcu		__attribute__((noderef, address_space(__rcu)))
+# define __incoherent __attribute__((noderef, address_space(__incoherent)))
 static inline void __chk_user_ptr(const volatile void __user *ptr) { }
 static inline void __chk_io_ptr(const volatile void __iomem *ptr) { }
 /* context/locking */
@@ -37,6 +38,7 @@  static inline void __chk_io_ptr(const volatile void __iomem *ptr) { }
 # define __iomem
 # define __percpu
 # define __rcu
+# define __incoherent
 # define __chk_user_ptr(x)	(void)0
 # define __chk_io_ptr(x)	(void)0
 /* context/locking */