From 29c7169b7b24a8520ca9faf84edc33c89de6b7cc Mon Sep 17 00:00:00 2001 From: Philippe Reynes Date: Fri, 15 Mar 2019 15:14:35 +0100 Subject: [PATCH] compat linux: import completion from linux 4.18 This patch port the file include/linux/completion.h from linux 4.18 to u-boot. It define the structure but all the function are stubbed. Signed-off-by: Philippe Reynes --- include/linux/completion.h | 173 +++++++++++++++++++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 include/linux/completion.h diff --git a/include/linux/completion.h b/include/linux/completion.h new file mode 100644 index 0000000000..9835826d28 --- /dev/null +++ b/include/linux/completion.h @@ -0,0 +1,173 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_COMPLETION_H +#define __LINUX_COMPLETION_H + +/* + * (C) Copyright 2001 Linus Torvalds + * + * Atomic wait-for-completion handler data structures. + * See kernel/sched/completion.c for details. + */ +#ifndef __UBOOT__ +#include +#endif /* __UBOOT__ */ + +/* + * struct completion - structure used to maintain state for a "completion" + * + * This is the opaque structure used to maintain the state for a "completion". + * Completions currently use a FIFO to queue threads that have to wait for + * the "completion" event. + * + * See also: complete(), wait_for_completion() (and friends _timeout, + * _interruptible, _interruptible_timeout, and _killable), init_completion(), + * reinit_completion(), and macros DECLARE_COMPLETION(), + * DECLARE_COMPLETION_ONSTACK(). + */ +struct completion { + unsigned int done; +#ifndef __UBOOT__ + wait_queue_head_t wait; +#endif /* __UBOOT__ */ +}; + +#define init_completion_map(x, m) __init_completion(x) +#define init_completion(x) __init_completion(x) +static inline void complete_acquire(struct completion *x) {} +static inline void complete_release(struct completion *x) {} + +#define COMPLETION_INITIALIZER(work) \ + { 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) } + +#define COMPLETION_INITIALIZER_ONSTACK_MAP(work, map) \ + (*({ init_completion_map(&(work), &(map)); &(work); })) + +#define COMPLETION_INITIALIZER_ONSTACK(work) \ + (*({ init_completion(&work); &work; })) + +/** + * DECLARE_COMPLETION - declare and initialize a completion structure + * @work: identifier for the completion structure + * + * This macro declares and initializes a completion structure. Generally used + * for static declarations. You should use the _ONSTACK variant for automatic + * variables. + */ +#define DECLARE_COMPLETION(work) \ + struct completion work = COMPLETION_INITIALIZER(work) + +/* + * Lockdep needs to run a non-constant initializer for on-stack + * completions - so we use the _ONSTACK() variant for those that + * are on the kernel stack: + */ +/** + * DECLARE_COMPLETION_ONSTACK - declare and initialize a completion structure + * @work: identifier for the completion structure + * + * This macro declares and initializes a completion structure on the kernel + * stack. + */ +#ifdef CONFIG_LOCKDEP +# define DECLARE_COMPLETION_ONSTACK(work) \ + struct completion work = COMPLETION_INITIALIZER_ONSTACK(work) +# define DECLARE_COMPLETION_ONSTACK_MAP(work, map) \ + struct completion work = COMPLETION_INITIALIZER_ONSTACK_MAP(work, map) +#else +# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work) +# define DECLARE_COMPLETION_ONSTACK_MAP(work, map) DECLARE_COMPLETION(work) +#endif + +/** + * init_completion - Initialize a dynamically allocated completion + * @x: pointer to completion structure that is to be initialized + * + * This inline function will initialize a dynamically created completion + * structure. + */ +static inline void __init_completion(struct completion *x) +{ + x->done = 0; +#ifndef __UBOOT__ + init_waitqueue_head(&x->wait); +#endif /* __UBOOT__ */ +} + +/** + * reinit_completion - reinitialize a completion structure + * @x: pointer to completion structure that is to be reinitialized + * + * This inline function should be used to reinitialize a completion structure so it can + * be reused. This is especially important after complete_all() is used. + */ +static inline void reinit_completion(struct completion *x) +{ + x->done = 0; +} + +#ifndef __UBOOT__ +extern void wait_for_completion(struct completion *); +extern void wait_for_completion_io(struct completion *); +extern int wait_for_completion_interruptible(struct completion *x); +extern int wait_for_completion_killable(struct completion *x); +extern unsigned long wait_for_completion_timeout(struct completion *x, + unsigned long timeout); +extern unsigned long wait_for_completion_io_timeout(struct completion *x, + unsigned long timeout); +extern long wait_for_completion_interruptible_timeout( + struct completion *x, unsigned long timeout); +extern long wait_for_completion_killable_timeout( + struct completion *x, unsigned long timeout); +extern bool try_wait_for_completion(struct completion *x); +extern bool completion_done(struct completion *x); + +extern void complete(struct completion *); +extern void complete_all(struct completion *); + +#else /* __UBOOT __ */ + +#define wait_for_completion(x) do {} while (0) +#define wait_for_completion_io(x) do {} while (0) + +inline int wait_for_completion_interruptible(struct completion *x) +{ + return 1; +} +inline int wait_for_completion_killable(struct completion *x) +{ + return 1; +} +inline unsigned long wait_for_completion_timeout(struct completion *x, + unsigned long timeout) +{ + return 1; +} +inline unsigned long wait_for_completion_io_timeout(struct completion *x, + unsigned long timeout) +{ + return 1; +} +inline long wait_for_completion_interruptible_timeout(struct completion *x, + unsigned long timeout) +{ + return 1; +} +inline long wait_for_completion_killable_timeout(struct completion *x, + unsigned long timeout) +{ + return 1; +} +inline bool try_wait_for_completion(struct completion *x) +{ + return 1; +} +inline bool completion_done(struct completion *x) +{ + return 1; +} + +#define complete(x) do {} while (0) +#define complete_all(x) do {} while (0) +#endif /* __UBOOT__ */ + +#endif -- 2.30.2