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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef __LINUX_COMPILER_TYPES_H
- #define __LINUX_COMPILER_TYPES_H
- #ifndef __ASSEMBLY__
- #ifdef __CHECKER__
- # define __user __attribute__((noderef, address_space(1)))
- # define __kernel __attribute__((address_space(0)))
- # define __safe __attribute__((safe))
- # define __force __attribute__((force))
- # define __nocast __attribute__((nocast))
- # define __iomem __attribute__((noderef, address_space(2)))
- # define __must_hold(x) __attribute__((context(x,1,1)))
- # define __acquires(x) __attribute__((context(x,0,1)))
- # define __releases(x) __attribute__((context(x,1,0)))
- # define __acquire(x) __context__(x,1)
- # define __release(x) __context__(x,-1)
- # define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
- # define __percpu __attribute__((noderef, address_space(3)))
- # define __rcu __attribute__((noderef, address_space(4)))
- # define __private __attribute__((noderef))
- extern void __chk_user_ptr(const volatile void __user *);
- extern void __chk_io_ptr(const volatile void __iomem *);
- # define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member))
- #else /* __CHECKER__ */
- # ifdef STRUCTLEAK_PLUGIN
- # define __user __attribute__((user))
- # else
- # define __user
- # endif
- # define __kernel
- # define __safe
- # define __force
- # define __nocast
- # define __iomem
- # define __chk_user_ptr(x) (void)0
- # define __chk_io_ptr(x) (void)0
- # define __builtin_warning(x, y...) (1)
- # define __must_hold(x)
- # define __acquires(x)
- # define __releases(x)
- # define __acquire(x) (void)0
- # define __release(x) (void)0
- # define __cond_lock(x,c) (c)
- # define __percpu
- # define __rcu
- # define __private
- # define ACCESS_PRIVATE(p, member) ((p)->member)
- #endif /* __CHECKER__ */
- /* Indirect macros required for expanded argument pasting, eg. __LINE__. */
- #define ___PASTE(a,b) a##b
- #define __PASTE(a,b) ___PASTE(a,b)
- #ifdef __KERNEL__
- /* Attributes */
- #include <linux/compiler_attributes.h>
- /* Compiler specific macros. */
- #ifdef __clang__
- #include <linux/compiler-clang.h>
- #elif defined(__INTEL_COMPILER)
- #include <linux/compiler-intel.h>
- #elif defined(__GNUC__)
- /* The above compilers also define __GNUC__, so order is important here. */
- #include <linux/compiler-gcc.h>
- #else
- #error "Unknown compiler"
- #endif
- /*
- * Some architectures need to provide custom definitions of macros provided
- * by linux/compiler-*.h, and can do so using asm/compiler.h. We include that
- * conditionally rather than using an asm-generic wrapper in order to avoid
- * build failures if any C compilation, which will include this file via an
- * -include argument in c_flags, occurs prior to the asm-generic wrappers being
- * generated.
- */
- #ifdef CONFIG_HAVE_ARCH_COMPILER_H
- #include <asm/compiler.h>
- #endif
- struct ftrace_branch_data {
- const char *func;
- const char *file;
- unsigned line;
- union {
- struct {
- unsigned long correct;
- unsigned long incorrect;
- };
- struct {
- unsigned long miss;
- unsigned long hit;
- };
- unsigned long miss_hit[2];
- };
- };
- struct ftrace_likely_data {
- struct ftrace_branch_data data;
- unsigned long constant;
- };
- #ifdef CONFIG_ENABLE_MUST_CHECK
- #define __must_check __attribute__((__warn_unused_result__))
- #else
- #define __must_check
- #endif
- #if defined(CC_USING_HOTPATCH)
- #define notrace __attribute__((hotpatch(0, 0)))
- #elif defined(CC_USING_PATCHABLE_FUNCTION_ENTRY)
- #define notrace __attribute__((patchable_function_entry(0, 0)))
- #else
- #define notrace __attribute__((__no_instrument_function__))
- #endif
- /*
- * it doesn't make sense on ARM (currently the only user of __naked)
- * to trace naked functions because then mcount is called without
- * stack and frame pointer being set up and there is no chance to
- * restore the lr register to the value before mcount was called.
- */
- #define __naked __attribute__((__naked__)) notrace
- #define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
- /*
- * Prefer gnu_inline, so that extern inline functions do not emit an
- * externally visible function. This makes extern inline behave as per gnu89
- * semantics rather than c99. This prevents multiple symbol definition errors
- * of extern inline functions at link time.
- * A lot of inline functions can cause havoc with function tracing.
- */
- #define inline inline __gnu_inline __inline_maybe_unused notrace
- /*
- * gcc provides both __inline__ and __inline as alternate spellings of
- * the inline keyword, though the latter is undocumented. New kernel
- * code should only use the inline spelling, but some existing code
- * uses __inline__. Since we #define inline above, to ensure
- * __inline__ has the same semantics, we need this #define.
- *
- * However, the spelling __inline is strictly reserved for referring
- * to the bare keyword.
- */
- #define __inline__ inline
- /*
- * GCC does not warn about unused static inline functions for -Wunused-function.
- * Suppress the warning in clang as well by using __maybe_unused, but enable it
- * for W=1 build. This will allow clang to find unused functions. Remove the
- * __inline_maybe_unused entirely after fixing most of -Wunused-function warnings.
- */
- #ifdef KBUILD_EXTRA_WARN1
- #define __inline_maybe_unused
- #else
- #define __inline_maybe_unused __maybe_unused
- #endif
- /*
- * Rather then using noinline to prevent stack consumption, use
- * noinline_for_stack instead. For documentation reasons.
- */
- #define noinline_for_stack noinline
- #endif /* __KERNEL__ */
- #endif /* __ASSEMBLY__ */
- /*
- * The below symbols may be defined for one or more, but not ALL, of the above
- * compilers. We don't consider that to be an error, so set them to nothing.
- * For example, some of them are for compiler specific plugins.
- */
- #ifndef __latent_entropy
- # define __latent_entropy
- #endif
- #ifndef __randomize_layout
- # define __randomize_layout __designated_init
- #endif
- #ifndef __no_randomize_layout
- # define __no_randomize_layout
- #endif
- #ifndef randomized_struct_fields_start
- # define randomized_struct_fields_start
- # define randomized_struct_fields_end
- #endif
- #ifndef asm_volatile_goto
- #define asm_volatile_goto(x...) asm goto(x)
- #endif
- #ifdef CONFIG_CC_HAS_ASM_INLINE
- #define asm_inline asm __inline
- #else
- #define asm_inline asm
- #endif
- #ifndef __no_fgcse
- # define __no_fgcse
- #endif
- /* Are two types/vars the same type (ignoring qualifiers)? */
- #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
- /* Is this type a native word size -- useful for atomic operations */
- #define __native_word(t) \
- (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
- sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
- /* Helpers for emitting diagnostics in pragmas. */
- #ifndef __diag
- #define __diag(string)
- #endif
- #ifndef __diag_GCC
- #define __diag_GCC(version, severity, string)
- #endif
- #define __diag_push() __diag(push)
- #define __diag_pop() __diag(pop)
- #define __diag_ignore(compiler, version, option, comment) \
- __diag_ ## compiler(version, ignore, option)
- #define __diag_warn(compiler, version, option, comment) \
- __diag_ ## compiler(version, warn, option)
- #define __diag_error(compiler, version, option, comment) \
- __diag_ ## compiler(version, error, option)
- #endif /* __LINUX_COMPILER_TYPES_H */
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