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compiler*.h: sync include/linux/compiler*.h with Linux 3.16
Copy them from Linux v3.16 tag. My main motivation of this commit is to add compiler-clang.h. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
This commit is contained in:
Masahiro Yamada
Tom Rini
parent
e6ca1ad604
commit
fb8ffd7cfc
6 changed files with 236 additions and 44 deletions
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@ -5,16 +5,23 @@
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#ifdef __CHECKER__
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# define __user __attribute__((noderef, address_space(1)))
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# define __kernel /* default address space */
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# define __kernel __attribute__((address_space(0)))
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# define __safe __attribute__((safe))
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# define __force __attribute__((force))
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# define __nocast __attribute__((nocast))
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# define __iomem __attribute__((noderef, address_space(2)))
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# define __must_hold(x) __attribute__((context(x,1,1)))
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# define __acquires(x) __attribute__((context(x,0,1)))
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# define __releases(x) __attribute__((context(x,1,0)))
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# define __acquire(x) __context__(x,1)
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# define __release(x) __context__(x,-1)
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# define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
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# define __percpu __attribute__((noderef, address_space(3)))
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#ifdef CONFIG_SPARSE_RCU_POINTER
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# define __rcu __attribute__((noderef, address_space(4)))
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#else
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# define __rcu
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#endif
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extern void __chk_user_ptr(const volatile void __user *);
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extern void __chk_io_ptr(const volatile void __iomem *);
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#else
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@ -27,13 +34,20 @@ extern void __chk_io_ptr(const volatile void __iomem *);
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# define __chk_user_ptr(x) (void)0
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# define __chk_io_ptr(x) (void)0
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# define __builtin_warning(x, y...) (1)
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# define __must_hold(x)
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# define __acquires(x)
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# define __releases(x)
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# define __acquire(x) (void)0
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# define __release(x) (void)0
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# define __cond_lock(x,c) (c)
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# define __percpu
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# define __rcu
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#endif
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/* Indirect macros required for expanded argument pasting, eg. __LINE__. */
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#define ___PASTE(a,b) a##b
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#define __PASTE(a,b) ___PASTE(a,b)
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#ifdef __KERNEL__
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#ifdef __GNUC__
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@ -49,6 +63,13 @@ extern void __chk_io_ptr(const volatile void __iomem *);
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# include <linux/compiler-intel.h>
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#endif
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/* Clang compiler defines __GNUC__. So we will overwrite implementations
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* coming from above header files here
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*/
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#ifdef __clang__
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#include <linux/compiler-clang.h>
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#endif
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/*
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* Generic compiler-dependent macros required for kernel
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* build go below this comment. Actual compiler/compiler version
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@ -156,6 +177,15 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
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(typeof(ptr)) (__ptr + (off)); })
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#endif
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#ifndef OPTIMIZER_HIDE_VAR
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#define OPTIMIZER_HIDE_VAR(var) barrier()
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#endif
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/* Not-quite-unique ID. */
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#ifndef __UNIQUE_ID
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# define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __LINE__)
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#endif
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#endif /* __KERNEL__ */
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#endif /* __ASSEMBLY__ */
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@ -228,7 +258,7 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
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/*
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* Rather then using noinline to prevent stack consumption, use
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* noinline_for_stack instead. For documentaiton reasons.
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* noinline_for_stack instead. For documentation reasons.
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*/
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#define noinline_for_stack noinline
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@ -270,11 +300,20 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
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# define __section(S) __attribute__ ((__section__(#S)))
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#endif
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#ifndef __visible
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#define __visible
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#endif
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/* Are two types/vars the same type (ignoring qualifiers)? */
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#ifndef __same_type
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# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
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#endif
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/* Is this type a native word size -- useful for atomic operations */
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#ifndef __native_word
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# define __native_word(t) (sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
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#endif
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/* Compile time object size, -1 for unknown */
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#ifndef __compiletime_object_size
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# define __compiletime_object_size(obj) -1
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@ -284,7 +323,48 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
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#endif
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#ifndef __compiletime_error
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# define __compiletime_error(message)
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/*
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* Sparse complains of variable sized arrays due to the temporary variable in
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* __compiletime_assert. Unfortunately we can't just expand it out to make
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* sparse see a constant array size without breaking compiletime_assert on old
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* versions of GCC (e.g. 4.2.4), so hide the array from sparse altogether.
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*/
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# ifndef __CHECKER__
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# define __compiletime_error_fallback(condition) \
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do { ((void)sizeof(char[1 - 2 * condition])); } while (0)
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# endif
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#endif
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#ifndef __compiletime_error_fallback
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# define __compiletime_error_fallback(condition) do { } while (0)
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#endif
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#define __compiletime_assert(condition, msg, prefix, suffix) \
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do { \
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bool __cond = !(condition); \
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extern void prefix ## suffix(void) __compiletime_error(msg); \
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if (__cond) \
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prefix ## suffix(); \
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__compiletime_error_fallback(__cond); \
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} while (0)
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#define _compiletime_assert(condition, msg, prefix, suffix) \
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__compiletime_assert(condition, msg, prefix, suffix)
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/**
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* compiletime_assert - break build and emit msg if condition is false
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* @condition: a compile-time constant condition to check
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* @msg: a message to emit if condition is false
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*
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* In tradition of POSIX assert, this macro will break the build if the
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* supplied condition is *false*, emitting the supplied error message if the
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* compiler has support to do so.
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*/
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#define compiletime_assert(condition, msg) \
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_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
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#define compiletime_assert_atomic_type(t) \
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compiletime_assert(__native_word(t), \
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"Need native word sized stores/loads for atomicity.")
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/*
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* Prevent the compiler from merging or refetching accesses. The compiler
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@ -300,4 +380,12 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
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*/
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#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
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/* Ignore/forbid kprobes attach on very low level functions marked by this attribute: */
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#ifdef CONFIG_KPROBES
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# define __kprobes __attribute__((__section__(".kprobes.text")))
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# define nokprobe_inline __always_inline
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#else
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# define __kprobes
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# define nokprobe_inline inline
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#endif
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#endif /* __LINUX_COMPILER_H */
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