diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/compiler-version.h | 30 | ||||
| -rw-r--r-- | include/linux/compiler_types.h | 5 | ||||
| -rw-r--r-- | include/linux/mod_devicetable.h | 2 | ||||
| -rw-r--r-- | include/linux/overflow.h | 23 | ||||
| -rw-r--r-- | include/linux/vermagic.h | 1 |
5 files changed, 56 insertions, 5 deletions
diff --git a/include/linux/compiler-version.h b/include/linux/compiler-version.h index 573fa85b6c0c..ac1665a98a15 100644 --- a/include/linux/compiler-version.h +++ b/include/linux/compiler-version.h @@ -12,3 +12,33 @@ * and add dependency on include/config/CC_VERSION_TEXT, which is touched * by Kconfig when the version string from the compiler changes. */ + +/* Additional tree-wide dependencies start here. */ + +/* + * If any of the GCC plugins change, we need to rebuild everything that + * was built with them, as they may have changed their behavior and those + * behaviors may need to be synchronized across all translation units. + */ +#ifdef GCC_PLUGINS +#include <generated/gcc-plugins.h> +#endif + +/* + * If the randstruct seed itself changes (whether for GCC plugins or + * Clang), the entire tree needs to be rebuilt since the randomization of + * structures may change between compilation units if not. + */ +#ifdef RANDSTRUCT +#include <generated/randstruct_hash.h> +#endif + +/* + * If any external changes affect Clang's integer wrapping sanitizer + * behavior, a full rebuild is needed as the coverage for wrapping types + * may have changed, which may impact the expected behaviors that should + * not differ between compilation units. + */ +#ifdef INTEGER_WRAP +#include <generated/integer-wrap.h> +#endif diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index 501cffddc2f4..20881cc761fa 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -449,6 +449,11 @@ struct ftrace_likely_data { /* * When the size of an allocated object is needed, use the best available * mechanism to find it. (For cases where sizeof() cannot be used.) + * + * Optional: only supported since gcc >= 12 + * + * gcc: https://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html + * clang: https://clang.llvm.org/docs/LanguageExtensions.html#evaluating-object-size */ #if __has_builtin(__builtin_dynamic_object_size) #define __struct_size(p) __builtin_dynamic_object_size(p, 0) diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index bd7e60c0b72f..ebcee9328168 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -601,7 +601,7 @@ struct dmi_system_id { #define DMI_MATCH(a, b) { .slot = a, .substr = b } #define DMI_EXACT_MATCH(a, b) { .slot = a, .substr = b, .exact_match = 1 } -#define PLATFORM_NAME_SIZE 20 +#define PLATFORM_NAME_SIZE 24 #define PLATFORM_MODULE_PREFIX "platform:" struct platform_device_id { diff --git a/include/linux/overflow.h b/include/linux/overflow.h index 0c7e3dcfe867..7b7be27ca113 100644 --- a/include/linux/overflow.h +++ b/include/linux/overflow.h @@ -396,7 +396,7 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend) * @name: Name for a variable to define. * @member: Name of the array member. * @count: Number of elements in the array; must be compile-time const. - * @initializer: initializer expression (could be empty for no init). + * @initializer: Initializer expression (e.g., pass `= { }` at minimum). */ #define _DEFINE_FLEX(type, name, member, count, initializer...) \ _Static_assert(__builtin_constant_p(count), \ @@ -404,7 +404,7 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend) union { \ u8 bytes[struct_size_t(type, member, count)]; \ type obj; \ - } name##_u initializer; \ + } name##_u = { .obj initializer }; \ type *name = (type *)&name##_u /** @@ -419,6 +419,9 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend) * Define a zeroed, on-stack, instance of @type structure with a trailing * flexible array member. * Use __struct_size(@name) to get compile-time size of it afterwards. + * Use __member_size(@name->member) to get compile-time size of @name members. + * Use STACK_FLEX_ARRAY_SIZE(@name, @member) to get compile-time number of + * elements in array @member. */ #define DEFINE_RAW_FLEX(type, name, member, count) \ _DEFINE_FLEX(type, name, member, count, = {}) @@ -436,8 +439,22 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend) * Define a zeroed, on-stack, instance of @TYPE structure with a trailing * flexible array member. * Use __struct_size(@NAME) to get compile-time size of it afterwards. + * Use __member_size(@NAME->member) to get compile-time size of @NAME members. + * Use STACK_FLEX_ARRAY_SIZE(@name, @member) to get compile-time number of + * elements in array @member. */ #define DEFINE_FLEX(TYPE, NAME, MEMBER, COUNTER, COUNT) \ - _DEFINE_FLEX(TYPE, NAME, MEMBER, COUNT, = { .obj.COUNTER = COUNT, }) + _DEFINE_FLEX(TYPE, NAME, MEMBER, COUNT, = { .COUNTER = COUNT, }) + +/** + * STACK_FLEX_ARRAY_SIZE() - helper macro for DEFINE_FLEX() family. + * Returns the number of elements in @array. + * + * @name: Name for a variable defined in DEFINE_RAW_FLEX()/DEFINE_FLEX(). + * @array: Name of the array member. + */ +#define STACK_FLEX_ARRAY_SIZE(name, array) \ + (__member_size((name)->array) / sizeof(*(name)->array) + \ + __must_be_array((name)->array)) #endif /* __LINUX_OVERFLOW_H */ diff --git a/include/linux/vermagic.h b/include/linux/vermagic.h index 939ceabcaf06..335c360d4f9b 100644 --- a/include/linux/vermagic.h +++ b/include/linux/vermagic.h @@ -33,7 +33,6 @@ #define MODULE_VERMAGIC_MODVERSIONS "" #endif #ifdef RANDSTRUCT -#include <generated/randstruct_hash.h> #define MODULE_RANDSTRUCT "RANDSTRUCT_" RANDSTRUCT_HASHED_SEED #else #define MODULE_RANDSTRUCT |