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>utp
Masahiro Yamada
Tom Rini
parent
e6ca1ad604
commit
fb8ffd7cfc
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@ -0,0 +1,12 @@
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#ifndef __LINUX_COMPILER_H
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#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
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#endif
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/* Some compiler specific definitions are overwritten here
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* for Clang compiler
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*/
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#ifdef uninitialized_var
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#undef uninitialized_var
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#define uninitialized_var(x) x = *(&(x))
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#endif
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@ -5,6 +5,9 @@
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/*
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* Common definitions for all gcc versions go here.
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*/
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#define GCC_VERSION (__GNUC__ * 10000 \
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+ __GNUC_MINOR__ * 100 \
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+ __GNUC_PATCHLEVEL__)
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/* Optimization barrier */
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@ -34,9 +37,15 @@
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__asm__ ("" : "=r"(__ptr) : "0"(ptr)); \
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(typeof(ptr)) (__ptr + (off)); })
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/* Make the optimizer believe the variable can be manipulated arbitrarily. */
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#define OPTIMIZER_HIDE_VAR(var) __asm__ ("" : "=r" (var) : "0" (var))
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#ifdef __CHECKER__
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#define __must_be_array(arr) 0
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#else
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/* &a[0] degrades to a pointer: a different type from an array */
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#define __must_be_array(a) \
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BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
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#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
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#endif
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/*
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* Force always-inline if the user requests it so via the .config,
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@ -44,15 +53,18 @@
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*/
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#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \
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!defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
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# define inline inline __attribute__((always_inline))
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# define __inline__ __inline__ __attribute__((always_inline))
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# define __inline __inline __attribute__((always_inline))
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# define inline inline __attribute__((always_inline)) notrace
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# define __inline__ __inline__ __attribute__((always_inline)) notrace
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# define __inline __inline __attribute__((always_inline)) notrace
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#else
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/* A lot of inline functions can cause havoc with function tracing */
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# define inline inline notrace
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# define __inline__ __inline__ notrace
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# define __inline __inline notrace
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#endif
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#define __deprecated __attribute__((deprecated))
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#ifndef __packed
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# define __packed __attribute__((packed))
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#endif
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#define __packed __attribute__((packed))
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#define __weak __attribute__((weak))
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/*
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@ -60,8 +72,12 @@
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* naked functions because then mcount is called without stack and frame pointer
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* being set up and there is no chance to restore the lr register to the value
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* before mcount was called.
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*
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* The asm() bodies of naked functions often depend on standard calling conventions,
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* therefore they must be noinline and noclone. GCC 4.[56] currently fail to enforce
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* this, so we must do so ourselves. See GCC PR44290.
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*/
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#define __naked __attribute__((naked)) notrace
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#define __naked __attribute__((naked)) noinline __noclone notrace
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#define __noreturn __attribute__((noreturn))
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@ -75,13 +91,10 @@
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* would be.
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* [...]
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*/
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#ifndef __pure
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# define __pure __attribute__((pure))
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#endif
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#ifndef __aligned
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# define __aligned(x) __attribute__((aligned(x)))
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#endif
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#define __printf(a,b) __attribute__((format(printf,a,b)))
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#define __pure __attribute__((pure))
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#define __aligned(x) __attribute__((aligned(x)))
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#define __printf(a, b) __attribute__((format(printf, a, b)))
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#define __scanf(a, b) __attribute__((format(scanf, a, b)))
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#define noinline __attribute__((noinline))
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#define __attribute_const__ __attribute__((__const__))
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#define __maybe_unused __attribute__((unused))
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@ -91,3 +104,15 @@
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#define _gcc_header(x) __gcc_header(linux/compiler-gcc##x.h)
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#define gcc_header(x) _gcc_header(x)
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#include gcc_header(__GNUC__)
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#if !defined(__noclone)
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#define __noclone /* not needed */
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#endif
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/*
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* A trick to suppress uninitialized variable warning without generating any
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* code
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*/
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#define uninitialized_var(x) x = x
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#define __always_inline inline __attribute__((always_inline))
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@ -2,20 +2,22 @@
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#error "Please don't include <linux/compiler-gcc3.h> directly, include <linux/compiler.h> instead."
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#endif
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#if __GNUC_MINOR__ >= 3
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#if GCC_VERSION < 30200
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# error Sorry, your compiler is too old - please upgrade it.
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#endif
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#if GCC_VERSION >= 30300
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# define __used __attribute__((__used__))
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#else
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# define __used __attribute__((__unused__))
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#endif
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#if __GNUC_MINOR__ >= 4
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#if GCC_VERSION >= 30400
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#define __must_check __attribute__((warn_unused_result))
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#endif
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/*
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* A trick to suppress uninitialized variable warning without generating any
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* code
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*/
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#define uninitialized_var(x) x = x
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#define __always_inline inline __attribute__((always_inline))
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#ifdef CONFIG_GCOV_KERNEL
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# if GCC_VERSION < 30400
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# error "GCOV profiling support for gcc versions below 3.4 not included"
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# endif /* __GNUC_MINOR__ */
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#endif /* CONFIG_GCOV_KERNEL */
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@ -4,7 +4,7 @@
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/* GCC 4.1.[01] miscompiles __weak */
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#ifdef __KERNEL__
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# if __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ <= 1
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# if GCC_VERSION >= 40100 && GCC_VERSION <= 40101
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# error Your version of gcc miscompiles the __weak directive
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# endif
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#endif
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@ -12,17 +12,12 @@
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#define __used __attribute__((__used__))
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#define __must_check __attribute__((warn_unused_result))
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#define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
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#ifndef __always_inline
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# define __always_inline inline __attribute__((always_inline))
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#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
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# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
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#endif
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/*
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* A trick to suppress uninitialized variable warning without generating any
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* code
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*/
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#define uninitialized_var(x) x = x
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#if __GNUC_MINOR__ >= 3
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#if GCC_VERSION >= 40300
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/* Mark functions as cold. gcc will assume any path leading to a call
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to them will be unlikely. This means a lot of manual unlikely()s
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are unnecessary now for any paths leading to the usual suspects
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the kernel context */
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#define __cold __attribute__((__cold__))
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#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
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#if __GNUC_MINOR__ >= 5
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#ifndef __CHECKER__
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# define __compiletime_warning(message) __attribute__((warning(message)))
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# define __compiletime_error(message) __attribute__((error(message)))
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#endif /* __CHECKER__ */
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#endif /* GCC_VERSION >= 40300 */
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#if GCC_VERSION >= 40500
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/*
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* Mark a position in code as unreachable. This can be used to
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* suppress control flow warnings after asm blocks that transfer
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* unreleased. Really, we need to have autoconf for the kernel.
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*/
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#define unreachable() __builtin_unreachable()
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/* Mark a function definition as prohibited from being cloned. */
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#define __noclone __attribute__((__noclone__))
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#endif /* GCC_VERSION >= 40500 */
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#if GCC_VERSION >= 40600
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/*
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* Tell the optimizer that something else uses this function or variable.
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*/
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#define __visible __attribute__((externally_visible))
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#endif
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#endif
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/*
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* GCC 'asm goto' miscompiles certain code sequences:
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*
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* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
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*
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* Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
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* Fixed in GCC 4.8.2 and later versions.
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*
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* (asm goto is automatically volatile - the naming reflects this.)
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*/
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#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
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#if __GNUC_MINOR__ > 0
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#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
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#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
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#if GCC_VERSION >= 40400
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#define __HAVE_BUILTIN_BSWAP32__
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#define __HAVE_BUILTIN_BSWAP64__
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#endif
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#if __GNUC_MINOR__ >= 4
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#define __compiletime_warning(message) __attribute__((warning(message)))
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#define __compiletime_error(message) __attribute__((error(message)))
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#if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600)
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#define __HAVE_BUILTIN_BSWAP16__
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#endif
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#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
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@ -0,0 +1,40 @@
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#ifndef __LINUX_COMPILER_H
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#error "Please don't include <linux/compiler-intel.h> directly, include <linux/compiler.h> instead."
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#endif
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#ifdef __ECC
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/* Some compiler specific definitions are overwritten here
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* for Intel ECC compiler
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*/
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#include <asm/intrinsics.h>
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/* Intel ECC compiler doesn't support gcc specific asm stmts.
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* It uses intrinsics to do the equivalent things.
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*/
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#undef RELOC_HIDE
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#undef OPTIMIZER_HIDE_VAR
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#define RELOC_HIDE(ptr, off) \
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({ unsigned long __ptr; \
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__ptr = (unsigned long) (ptr); \
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(typeof(ptr)) (__ptr + (off)); })
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/* This should act as an optimization barrier on var.
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* Given that this compiler does not have inline assembly, a compiler barrier
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* is the best we can do.
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*/
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#define OPTIMIZER_HIDE_VAR(var) barrier()
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/* Intel ECC compiler doesn't support __builtin_types_compatible_p() */
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#define __must_be_array(a) 0
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#endif
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#ifndef __HAVE_BUILTIN_BSWAP16__
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/* icc has this, but it's called _bswap16 */
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#define __HAVE_BUILTIN_BSWAP16__
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#define __builtin_bswap16 _bswap16
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#endif
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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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/*
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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);
|
|||
*/
|
||||
#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
|
||||
|
||||
/* Ignore/forbid kprobes attach on very low level functions marked by this attribute: */
|
||||
#ifdef CONFIG_KPROBES
|
||||
# define __kprobes __attribute__((__section__(".kprobes.text")))
|
||||
# define nokprobe_inline __always_inline
|
||||
#else
|
||||
# define __kprobes
|
||||
# define nokprobe_inline inline
|
||||
#endif
|
||||
#endif /* __LINUX_COMPILER_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue