path: root/include
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authorLuc Van Oostenryck <luc.vanoostenryck@gmail.com>2020-08-28 10:53:01 +0200
committerMiguel Ojeda <miguel.ojeda.sandonis@gmail.com>2020-08-29 09:29:32 +0200
commite5fc436f06eef54ef512ea55a9db8eb9f2e76959 (patch)
tree341428ddf26259238c7af79d5817929e0adb6151 /include
parentCompiler Attributes: fix comment concerning GCC 4.6 (diff)
sparse: use static inline for __chk_{user,io}_ptr()
__chk_user_ptr() & __chk_io_ptr() are dummy extern functions which only exist to enforce the typechecking of __user or __iomem pointers in macros when using sparse. This typechecking is done by inserting a call to these functions. But the presence of these calls can inhibit some simplifications and so influence the result of sparse's analysis of context/locking. Fix this by changing these calls into static inline calls with an empty body. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Diffstat (limited to 'include')
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index 4b33cb385f96..6e390d58a9f8 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -11,8 +11,8 @@
# define __iomem __attribute__((noderef, address_space(__iomem)))
# define __percpu __attribute__((noderef, address_space(__percpu)))
# define __rcu __attribute__((noderef, address_space(__rcu)))
-extern void __chk_user_ptr(const volatile void __user *);
-extern void __chk_io_ptr(const volatile void __iomem *);
+static inline void __chk_user_ptr(const volatile void __user *ptr) { }
+static inline void __chk_io_ptr(const volatile void __iomem *ptr) { }
/* context/locking */
# define __must_hold(x) __attribute__((context(x,1,1)))
# define __acquires(x) __attribute__((context(x,0,1)))