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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-03-01 10:31:53 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-03-01 10:31:53 -0800 |
| commit | 04421fe2671c1790ab6529fad87ce8c73af0e1eb (patch) | |
| tree | d2f803b4eef6108648f1beee6bf97a342cd9bc73 /include/linux/compiler.h | |
| parent | 7fb45edba8b5206e645572a682c946f67375447e (diff) | |
| parent | cfbf8d4857c26a8a307fb7cd258074c9dcd8c691 (diff) | |
| download | lwn-04421fe2671c1790ab6529fad87ce8c73af0e1eb.tar.gz lwn-04421fe2671c1790ab6529fad87ce8c73af0e1eb.zip | |
Merge tag 'v3.14-rc4' into next
Merge with Linux 3.14-rc4 to bring devm_request_any_context_irq().
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 92669cd182a6..2472740d7ab2 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -170,6 +170,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect); (typeof(ptr)) (__ptr + (off)); }) #endif +#ifndef OPTIMIZER_HIDE_VAR +#define OPTIMIZER_HIDE_VAR(var) barrier() +#endif + /* Not-quite-unique ID. */ #ifndef __UNIQUE_ID # define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __LINE__) @@ -298,6 +302,11 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect); # define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) #endif +/* Is this type a native word size -- useful for atomic operations */ +#ifndef __native_word +# define __native_word(t) (sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long)) +#endif + /* Compile time object size, -1 for unknown */ #ifndef __compiletime_object_size # define __compiletime_object_size(obj) -1 @@ -337,6 +346,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect); #define compiletime_assert(condition, msg) \ _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) +#define compiletime_assert_atomic_type(t) \ + compiletime_assert(__native_word(t), \ + "Need native word sized stores/loads for atomicity.") + /* * Prevent the compiler from merging or refetching accesses. The compiler * is also forbidden from reordering successive instances of ACCESS_ONCE(), |