Contributors: 51
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Linus Torvalds |
146 |
12.67% |
14 |
13.08% |
| Kees Cook |
117 |
10.16% |
9 |
8.41% |
| Will Deacon |
112 |
9.72% |
3 |
2.80% |
| Marco Elver |
78 |
6.77% |
8 |
7.48% |
| Nick Desaulniers |
63 |
5.47% |
3 |
2.80% |
| Steven Rostedt |
59 |
5.12% |
4 |
3.74% |
| Arnd Bergmann |
55 |
4.77% |
1 |
0.93% |
| Daniel Santos |
49 |
4.25% |
1 |
0.93% |
| Luc Van Oostenryck |
39 |
3.39% |
3 |
2.80% |
| Alexander Lobakin |
32 |
2.78% |
1 |
0.93% |
| Rasmus Villemoes |
30 |
2.60% |
3 |
2.80% |
| Tony Ambardar |
30 |
2.60% |
1 |
0.93% |
| Mark Rutland |
28 |
2.43% |
1 |
0.93% |
| Boqun Feng |
27 |
2.34% |
1 |
0.93% |
| Rusty Russell |
27 |
2.34% |
2 |
1.87% |
| Josh Triplett |
23 |
2.00% |
3 |
2.80% |
| Peter Zijlstra |
20 |
1.74% |
4 |
3.74% |
| Hao Luo |
20 |
1.74% |
2 |
1.87% |
| Miguel Ojeda Sandonis |
19 |
1.65% |
6 |
5.61% |
| Yonghong Song |
16 |
1.39% |
2 |
1.87% |
| Sami Tolvanen |
16 |
1.39% |
2 |
1.87% |
| Masahiro Yamada |
15 |
1.30% |
2 |
1.87% |
| Przemek Kitszel |
14 |
1.22% |
1 |
0.93% |
| Andrey Ryabinin |
12 |
1.04% |
1 |
0.93% |
| Alexander Potapenko |
10 |
0.87% |
1 |
0.93% |
| Kumar Kartikeya Dwivedi |
10 |
0.87% |
1 |
0.93% |
| Paul Burton |
9 |
0.78% |
1 |
0.93% |
| Joe Stringer |
8 |
0.69% |
1 |
0.93% |
| Linus Torvalds (pre-git) |
7 |
0.61% |
2 |
1.87% |
| Sven Schnelle |
7 |
0.61% |
1 |
0.93% |
| Witold Baryluk |
7 |
0.61% |
1 |
0.93% |
| Andrew Morton |
5 |
0.43% |
2 |
1.87% |
| Christian Bornträger |
5 |
0.43% |
1 |
0.93% |
| Thomas Gleixner |
4 |
0.35% |
1 |
0.93% |
| James Hogan |
4 |
0.35% |
1 |
0.93% |
| Andi Kleen |
3 |
0.26% |
1 |
0.93% |
| Chris Metcalf |
3 |
0.26% |
1 |
0.93% |
| Robert P. J. Day |
3 |
0.26% |
1 |
0.93% |
| Ingo Molnar |
3 |
0.26% |
1 |
0.93% |
| Nathan Chancellor |
3 |
0.26% |
1 |
0.93% |
| David Howells |
3 |
0.26% |
1 |
0.93% |
| Petr Pavlu |
2 |
0.17% |
1 |
0.93% |
| Johannes Berg |
1 |
0.09% |
1 |
0.93% |
| Björn Helgaas |
1 |
0.09% |
1 |
0.93% |
| David Woodhouse |
1 |
0.09% |
1 |
0.93% |
| Alexander Stein |
1 |
0.09% |
1 |
0.93% |
| Heiko Carstens |
1 |
0.09% |
1 |
0.93% |
| Vegard Nossum |
1 |
0.09% |
1 |
0.93% |
| Al Viro |
1 |
0.09% |
1 |
0.93% |
| Martin Schwidefsky |
1 |
0.09% |
1 |
0.93% |
| Russ Cox |
1 |
0.09% |
1 |
0.93% |
| Total |
1152 |
|
107 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_COMPILER_TYPES_H
#define __LINUX_COMPILER_TYPES_H
/*
* __has_builtin is supported on gcc >= 10, clang >= 3 and icc >= 21.
* In the meantime, to support gcc < 10, we implement __has_builtin
* by hand.
*/
#ifndef __has_builtin
#define __has_builtin(x) (0)
#endif
#ifndef __ASSEMBLY__
/*
* Skipped when running bindgen due to a libclang issue;
* see https://github.com/rust-lang/rust-bindgen/issues/2244.
*/
#if defined(CONFIG_DEBUG_INFO_BTF) && defined(CONFIG_PAHOLE_HAS_BTF_TAG) && \
__has_attribute(btf_type_tag) && !defined(__BINDGEN__)
# define BTF_TYPE_TAG(value) __attribute__((btf_type_tag(#value)))
#else
# define BTF_TYPE_TAG(value) /* nothing */
#endif
/* sparse defines __CHECKER__; see Documentation/dev-tools/sparse.rst */
#ifdef __CHECKER__
/* address spaces */
# define __kernel __attribute__((address_space(0)))
# define __user __attribute__((noderef, address_space(__user)))
# define __iomem __attribute__((noderef, address_space(__iomem)))
# define __percpu __attribute__((noderef, address_space(__percpu)))
# define __rcu __attribute__((noderef, address_space(__rcu)))
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)))
# define __cond_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)
/* other */
# define __force __attribute__((force))
# define __nocast __attribute__((nocast))
# define __safe __attribute__((safe))
# define __private __attribute__((noderef))
# define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member))
#else /* __CHECKER__ */
/* address spaces */
# define __kernel
# ifdef STRUCTLEAK_PLUGIN
# define __user __attribute__((user))
# else
# define __user BTF_TYPE_TAG(user)
# endif
# define __iomem
# define __percpu BTF_TYPE_TAG(percpu)
# define __rcu BTF_TYPE_TAG(rcu)
# define __chk_user_ptr(x) (void)0
# define __chk_io_ptr(x) (void)0
/* context/locking */
# define __must_hold(x)
# define __acquires(x)
# define __cond_acquires(x)
# define __releases(x)
# define __acquire(x) (void)0
# define __release(x) (void)0
# define __cond_lock(x,c) (c)
/* other */
# define __force
# define __nocast
# define __safe
# define __private
# define ACCESS_PRIVATE(p, member) ((p)->member)
# define __builtin_warning(x, y...) (1)
#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>
#if CONFIG_FUNCTION_ALIGNMENT > 0
#define __function_aligned __aligned(CONFIG_FUNCTION_ALIGNMENT)
#else
#define __function_aligned
#endif
/*
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-cold-function-attribute
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-cold-label-attribute
*
* When -falign-functions=N is in use, we must avoid the cold attribute as
* GCC drops the alignment for cold functions. Worse, GCC can implicitly mark
* callees of cold functions as cold themselves, so it's not sufficient to add
* __function_aligned here as that will not ensure that callees are correctly
* aligned.
*
* See:
*
* https://lore.kernel.org/lkml/Y77%2FqVgvaJidFpYt@FVFF77S0Q05N
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88345#c9
*/
#if defined(CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT) || (CONFIG_FUNCTION_ALIGNMENT == 0)
#define __cold __attribute__((__cold__))
#else
#define __cold
#endif
/*
* On x86-64 and arm64 targets, __preserve_most changes the calling convention
* of a function to make the code in the caller as unintrusive as possible. This
* convention behaves identically to the C calling convention on how arguments
* and return values are passed, but uses a different set of caller- and callee-
* saved registers.
*
* The purpose is to alleviates the burden of saving and recovering a large
* register set before and after the call in the caller. This is beneficial for
* rarely taken slow paths, such as error-reporting functions that may be called
* from hot paths.
*
* Note: This may conflict with instrumentation inserted on function entry which
* does not use __preserve_most or equivalent convention (if in assembly). Since
* function tracing assumes the normal C calling convention, where the attribute
* is supported, __preserve_most implies notrace. It is recommended to restrict
* use of the attribute to functions that should or already disable tracing.
*
* Optional: not supported by gcc.
*
* clang: https://clang.llvm.org/docs/AttributeReference.html#preserve-most
*/
#if __has_attribute(__preserve_most__) && (defined(CONFIG_X86_64) || defined(CONFIG_ARM64))
# define __preserve_most notrace __attribute__((__preserve_most__))
#else
# define __preserve_most
#endif
/*
* Annotating a function/variable with __retain tells the compiler to place
* the object in its own section and set the flag SHF_GNU_RETAIN. This flag
* instructs the linker to retain the object during garbage-cleanup or LTO
* phases.
*
* Note that the __used macro is also used to prevent functions or data
* being optimized out, but operates at the compiler/IR-level and may still
* allow unintended removal of objects during linking.
*
* Optional: only supported since gcc >= 11, clang >= 13
*
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-retain-function-attribute
* clang: https://clang.llvm.org/docs/AttributeReference.html#retain
*/
#if __has_attribute(__retain__) && \
(defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || \
defined(CONFIG_LTO_CLANG))
# define __retain __attribute__((__retain__))
#else
# define __retain
#endif
/* Compiler specific macros. */
#ifdef __clang__
#include <linux/compiler-clang.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;
};
#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
/*
* 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
/*
* Sanitizer helper attributes: Because using __always_inline and
* __no_sanitize_* conflict, provide helper attributes that will either expand
* to __no_sanitize_* in compilation units where instrumentation is enabled
* (__SANITIZE_*__), or __always_inline in compilation units without
* instrumentation (__SANITIZE_*__ undefined).
*/
#ifdef __SANITIZE_ADDRESS__
/*
* We can't declare function 'inline' because __no_sanitize_address conflicts
* with inlining. Attempt to inline it may cause a build failure.
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
* '__maybe_unused' allows us to avoid defined-but-not-used warnings.
*/
# define __no_kasan_or_inline __no_sanitize_address notrace __maybe_unused
# define __no_sanitize_or_inline __no_kasan_or_inline
#else
# define __no_kasan_or_inline __always_inline
#endif
#ifdef __SANITIZE_THREAD__
/*
* Clang still emits instrumentation for __tsan_func_{entry,exit}() and builtin
* atomics even with __no_sanitize_thread (to avoid false positives in userspace
* ThreadSanitizer). The kernel's requirements are stricter and we really do not
* want any instrumentation with __no_kcsan.
*
* Therefore we add __disable_sanitizer_instrumentation where available to
* disable all instrumentation. See Kconfig.kcsan where this is mandatory.
*/
# define __no_kcsan __no_sanitize_thread __disable_sanitizer_instrumentation
/*
* Type qualifier to mark variables where all data-racy accesses should be
* ignored by KCSAN. Note, the implementation simply marks these variables as
* volatile, since KCSAN will treat such accesses as "marked".
*/
# define __data_racy volatile
# define __no_sanitize_or_inline __no_kcsan notrace __maybe_unused
#else
# define __no_kcsan
# define __data_racy
#endif
#ifdef __SANITIZE_MEMORY__
/*
* Similarly to KASAN and KCSAN, KMSAN loses function attributes of inlined
* functions, therefore disabling KMSAN checks also requires disabling inlining.
*
* __no_sanitize_or_inline effectively prevents KMSAN from reporting errors
* within the function and marks all its outputs as initialized.
*/
# define __no_sanitize_or_inline __no_kmsan_checks notrace __maybe_unused
#endif
#ifndef __no_sanitize_or_inline
#define __no_sanitize_or_inline __always_inline
#endif
/*
* Apply __counted_by() when the Endianness matches to increase test coverage.
*/
#ifdef __LITTLE_ENDIAN
#define __counted_by_le(member) __counted_by(member)
#define __counted_by_be(member)
#else
#define __counted_by_le(member)
#define __counted_by_be(member) __counted_by(member)
#endif
/* Do not trap wrapping arithmetic within an annotated function. */
#ifdef CONFIG_UBSAN_SIGNED_WRAP
# define __signed_wrap __attribute__((no_sanitize("signed-integer-overflow")))
#else
# define __signed_wrap
#endif
/* Section for code which can't be instrumented at all */
#define __noinstr_section(section) \
noinline notrace __attribute((__section__(section))) \
__no_kcsan __no_sanitize_address __no_profile __no_sanitize_coverage \
__no_sanitize_memory __signed_wrap
#define noinstr __noinstr_section(".noinstr.text")
/*
* The __cpuidle section is used twofold:
*
* 1) the original use -- identifying if a CPU is 'stuck' in idle state based
* on it's instruction pointer. See cpu_in_idle().
*
* 2) supressing instrumentation around where cpuidle disables RCU; where the
* function isn't strictly required for #1, this is interchangeable with
* noinstr.
*/
#define __cpuidle __noinstr_section(".cpuidle.text")
#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
#if defined(RANDSTRUCT) && !defined(__CHECKER__)
# define __randomize_layout __designated_init __attribute__((randomize_layout))
# define __no_randomize_layout __attribute__((no_randomize_layout))
/* This anon struct can add padding, so only enable it under randstruct. */
# define randomized_struct_fields_start struct {
# define randomized_struct_fields_end } __randomize_layout;
#else
# define __randomize_layout __designated_init
# define __no_randomize_layout
# define randomized_struct_fields_start
# define randomized_struct_fields_end
#endif
#ifndef __noscs
# define __noscs
#endif
#ifndef __nocfi
# define __nocfi
#endif
/*
* Any place that could be marked with the "alloc_size" attribute is also
* a place to be marked with the "malloc" attribute, except those that may
* be performing a _reallocation_, as that may alias the existing pointer.
* For these, use __realloc_size().
*/
#ifdef __alloc_size__
# define __alloc_size(x, ...) __alloc_size__(x, ## __VA_ARGS__) __malloc
# define __realloc_size(x, ...) __alloc_size__(x, ## __VA_ARGS__)
#else
# define __alloc_size(x, ...) __malloc
# define __realloc_size(x, ...)
#endif
/*
* When the size of an allocated object is needed, use the best available
* mechanism to find it. (For cases where sizeof() cannot be used.)
*/
#if __has_builtin(__builtin_dynamic_object_size)
#define __struct_size(p) __builtin_dynamic_object_size(p, 0)
#define __member_size(p) __builtin_dynamic_object_size(p, 1)
#else
#define __struct_size(p) __builtin_object_size(p, 0)
#define __member_size(p) __builtin_object_size(p, 1)
#endif
/*
* Some versions of gcc do not mark 'asm goto' volatile:
*
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103979
*
* We do it here by hand, because it doesn't hurt.
*/
#ifndef asm_goto_output
#define asm_goto_output(x...) asm volatile goto(x)
#endif
/*
* Clang has trouble with constraints with multiple
* alternative behaviors (mainly "g" and "rm").
*/
#ifndef ASM_INPUT_G
#define ASM_INPUT_G "g"
#define ASM_INPUT_RM "rm"
#endif
#ifdef CONFIG_CC_HAS_ASM_INLINE
#define asm_inline asm __inline
#else
#define asm_inline asm
#endif
/* Are two types/vars the same type (ignoring qualifiers)? */
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
/*
* __unqual_scalar_typeof(x) - Declare an unqualified scalar type, leaving
* non-scalar types unchanged.
*/
/*
* Prefer C11 _Generic for better compile-times and simpler code. Note: 'char'
* is not type-compatible with 'signed char', and we define a separate case.
*/
#define __scalar_type_to_expr_cases(type) \
unsigned type: (unsigned type)0, \
signed type: (signed type)0
#define __unqual_scalar_typeof(x) typeof( \
_Generic((x), \
char: (char)0, \
__scalar_type_to_expr_cases(char), \
__scalar_type_to_expr_cases(short), \
__scalar_type_to_expr_cases(int), \
__scalar_type_to_expr_cases(long), \
__scalar_type_to_expr_cases(long long), \
default: (x)))
/* 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))
#ifdef __OPTIMIZE__
# define __compiletime_assert(condition, msg, prefix, suffix) \
do { \
/* \
* __noreturn is needed to give the compiler enough \
* information to avoid certain possibly-uninitialized \
* warnings (regardless of the build failing). \
*/ \
__noreturn extern void prefix ## suffix(void) \
__compiletime_error(msg); \
if (!(condition)) \
prefix ## suffix(); \
} while (0)
#else
# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)
#endif
#define _compiletime_assert(condition, msg, prefix, suffix) \
__compiletime_assert(condition, msg, prefix, suffix)
/**
* compiletime_assert - break build and emit msg if condition is false
* @condition: a compile-time constant condition to check
* @msg: a message to emit if condition is false
*
* In tradition of POSIX assert, this macro will break the build if the
* supplied condition is *false*, emitting the supplied error message if the
* compiler has support to do so.
*/
#define compiletime_assert(condition, msg) \
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
#define compiletime_assert_atomic_type(t) \
compiletime_assert(__native_word(t), \
"Need native word sized stores/loads for atomicity.")
/* 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)
#ifndef __diag_ignore_all
#define __diag_ignore_all(option, comment)
#endif
#endif /* __LINUX_COMPILER_TYPES_H */