litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'include/linux/atmclip.h')

0 files changed, 0 insertions, 0 deletions

/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_MODULE_PARAMS_H #define _LINUX_MODULE_PARAMS_H /* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */ #include <linux/init.h> #include <linux/stringify.h> #include <linux/kernel.h> /* You can override this manually, but generally this should match the module name. */ #ifdef MODULE #define MODULE_PARAM_PREFIX /* empty */ #else #define MODULE_PARAM_PREFIX KBUILD_MODNAME "." #endif /* Chosen so that structs with an unsigned long line up. */ #define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long)) #ifdef MODULE #define __MODULE_INFO(tag, name, info) \ static const char __UNIQUE_ID(name)[] \ __used __attribute__((section(".modinfo"), unused, aligned(1))) \ = __stringify(tag) "=" info #else /* !MODULE */ /* This struct is here for syntactic coherency, it is not used */ #define __MODULE_INFO(tag, name, info) \ struct __UNIQUE_ID(name) {} #endif #define __MODULE_PARM_TYPE(name, _type) \ __MODULE_INFO(parmtype, name##type, #name ":" _type) /* One for each parameter, describing how to use it. Some files do multiple of these per line, so can't just use MODULE_INFO. */ #define MODULE_PARM_DESC(_parm, desc) \ __MODULE_INFO(parm, _parm, #_parm ":" desc) struct kernel_param; /* * Flags available for kernel_param_ops * * NOARG - the parameter allows for no argument (foo instead of foo=1) */ enum { KERNEL_PARAM_OPS_FL_NOARG = (1 << 0) }; struct kernel_param_ops { /* How the ops should behave */ unsigned int flags; /* Returns 0, or -errno. arg is in kp->arg. */ int (*set)(const char *val, const struct kernel_param *kp); /* Returns length written or -errno. Buffer is 4k (ie. be short!) */ int (*get)(char *buffer, const struct kernel_param *kp); /* Optional function to free kp->arg when module unloaded. */ void (*free)(void *arg); }; /* * Flags available for kernel_param * * UNSAFE - the parameter is dangerous and setting it will taint the kernel * HWPARAM - Hardware param not permitted in lockdown mode */ enum { KERNEL_PARAM_FL_UNSAFE = (1 << 0), KERNEL_PARAM_FL_HWPARAM = (1 << 1), }; struct kernel_param { const char *name; struct module *mod; const struct kernel_param_ops *ops; const u16 perm; s8 level; u8 flags; union { void *arg; const struct kparam_string *str; const struct kparam_array *arr; }; }; extern const struct kernel_param __start___param[], __stop___param[]; /* Special one for strings we want to copy into */ struct kparam_string { unsigned int maxlen; char *string; }; /* Special one for arrays */ struct kparam_array { unsigned int max; unsigned int elemsize; unsigned int *num; const struct kernel_param_ops *ops; void *elem; }; /** * module_param - typesafe helper for a module/cmdline parameter * @value: the variable to alter, and exposed parameter name. * @type: the type of the parameter * @perm: visibility in sysfs. * * @value becomes the module parameter, or (prefixed by KBUILD_MODNAME and a * ".") the kernel commandline parameter. Note that - is changed to _, so * the user can use "foo-bar=1" even for variable "foo_bar". * * @perm is 0 if the the variable is not to appear in sysfs, or 0444 * for world-readable, 0644 for root-writable, etc. Note that if it * is writable, you may need to use kernel_param_lock() around * accesses (esp. charp, which can be kfreed when it changes). * * The @type is simply pasted to refer to a param_ops_##type and a * param_check_##type: for convenience many standard types are provided but * you can create your own by defining those variables. * * Standard types are: * byte, short, ushort, int, uint, long, ulong * charp: a character pointer * bool: a bool, values 0/1, y/n, Y/N. * invbool: the above, only sense-reversed (N = true). */ #define module_param(name, type, perm) \ module_param_named(name, name, type, perm) /** * module_param_unsafe - same as module_param but taints kernel */ #define module_param_unsafe(name, type, perm) \ module_param_named_unsafe(name, name, type, perm) /** * module_param_named - typesafe helper for a renamed module/cmdline parameter * @name: a valid C identifier which is the parameter name. * @value: the actual lvalue to alter. * @type: the type of the parameter * @perm: visibility in sysfs. * * Usually it's a good idea to have variable names and user-exposed names the * same, but that's harder if the variable must be non-static or is inside a * structure. This allows exposure under a different name. */ #define module_param_named(name, value, type, perm) \ param_check_##type(name, &(value)); \ module_param_cb(name, &param_ops_##type, &value, perm); \ __MODULE_PARM_TYPE(name, #type) /** * module_param_named_unsafe - same as module_param_named but taints kernel */ #define module_param_named_unsafe(name, value, type, perm) \ param_check_##type(name, &(value)); \ module_param_cb_unsafe(name, &param_ops_##type, &value, perm); \ __MODULE_PARM_TYPE(name, #type) /** * module_param_cb - general callback for a module/cmdline parameter * @name: a valid C identifier which is the parameter name. * @ops: the set & get operations for this parameter. * @perm: visibility in sysfs. * * The ops can have NULL set or get functions. */ #define module_param_cb(name, ops, arg, perm) \ __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0) #define module_param_cb_unsafe(name, ops, arg, perm) \ __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, \ KERNEL_PARAM_FL_UNSAFE) /** * <level>_param_cb - general callback for a module/cmdline parameter * to be evaluated before certain initcall level * @name: a valid C identifier which is the parameter name. * @ops: the set & get operations for this parameter. * @perm: visibility in sysfs. * * The ops can have NULL set or get functions. */ #define __level_param_cb(name, ops, arg, perm, level) \ __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, level, 0) #define core_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 1) #define postcore_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 2) #define arch_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 3) #define subsys_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 4) #define fs_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 5) #define device_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 6) #define late_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 7) /* On alpha, ia64 and ppc64 relocations to global data cannot go into read-only sections (which is part of respective UNIX ABI on these platforms). So 'const' makes no sense and even causes compile failures with some compilers. */ #if defined(CONFIG_ALPHA) || defined(CONFIG_IA64) || defined(CONFIG_PPC64) #define __moduleparam_const #else #define __moduleparam_const const #endif /* This is the fundamental function for registering boot/module parameters. */ #define __module_param_call(prefix, name, ops, arg, perm, level, flags) \ /* Default value instead of permissions? */ \ static const char __param_str_##name[] = prefix #name; \ static struct kernel_param __moduleparam_const __param_##name \ __used \ __attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \ = { __param_str_##name, THIS_MODULE, ops, \ VERIFY_OCTAL_PERMISSIONS(perm), level, flags, { arg } } /* Obsolete - use module_param_cb() */ #define module_param_call(name, _set, _get, arg, perm) \ static const struct kernel_param_ops __param_ops_##name = \ { .flags = 0, .set = _set, .get = _get }; \ __module_param_call(MODULE_PARAM_PREFIX, \ name, &__param_ops_##name, arg, perm, -1, 0) #ifdef CONFIG_SYSFS extern void kernel_param_lock(struct module *mod); extern void kernel_param_unlock(struct module *mod); #else static inline void kernel_param_lock(struct module *mod) { } static inline void kernel_param_unlock(struct module *mod) { } #endif #ifndef MODULE /** * core_param - define a historical core kernel parameter. * @name: the name of the cmdline and sysfs parameter (often the same as var) * @var: the variable * @type: the type of the parameter * @perm: visibility in sysfs * * core_param is just like module_param(), but cannot be modular and * doesn't add a prefix (such as "printk."). This is for compatibility


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