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linux/compat.h: Add wait_event_timeout macro
Add wait_event_timeout - sleep until a condition gets true or a timeout elapses. This is a stripped version of the same from Linux kernel with the following u-boot specific modifications: - no wait queues supported - use u-boot timer to detect timeouts - check for Ctrl-C pressed during wait Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> [trini: Drop atomic_read from gadget/ether.c as this has existed for a while and now causes problems] Signed-off-by: Tom Rini <trini@konsulko.com>
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2 changed files with 54 additions and 1 deletions
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@ -33,7 +33,6 @@
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#define USB_NET_NAME "usb_ether"
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#define USB_NET_NAME "usb_ether"
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#define atomic_read
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extern struct platform_data brd;
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extern struct platform_data brd;
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@ -1,12 +1,20 @@
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#ifndef _LINUX_COMPAT_H_
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#ifndef _LINUX_COMPAT_H_
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#define _LINUX_COMPAT_H_
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#define _LINUX_COMPAT_H_
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#include <console.h>
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#include <log.h>
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#include <log.h>
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#include <malloc.h>
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#include <malloc.h>
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#include <asm/processor.h>
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#include <linux/types.h>
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#ifdef CONFIG_XEN
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#include <xen/events.h>
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#endif
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struct unused {};
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struct unused {};
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typedef struct unused unused_t;
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typedef struct unused unused_t;
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@ -122,6 +130,52 @@ static inline void kmem_cache_destroy(struct kmem_cache *cachep)
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#define add_wait_queue(...) do { } while (0)
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#define add_wait_queue(...) do { } while (0)
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#define remove_wait_queue(...) do { } while (0)
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#define remove_wait_queue(...) do { } while (0)
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#ifndef CONFIG_XEN
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#define eventchn_poll()
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#endif
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#define __wait_event_timeout(condition, timeout, ret) \
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({ \
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ulong __ret = ret; /* explicit shadow */ \
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ulong start = get_timer(0); \
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for (;;) { \
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eventchn_poll(); \
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if (condition) { \
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__ret = 1; \
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break; \
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} \
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if ((get_timer(start) > timeout) || ctrlc()) { \
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__ret = 0; \
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break; \
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} \
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cpu_relax(); \
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} \
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__ret; \
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})
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/**
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* wait_event_timeout() - Wait until the event occurs before the timeout.
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* @wr_head: The wait queue to wait on.
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* @condition: Expression for the event to wait for.
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* @timeout: Maximum waiting time.
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*
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* We wait until the @condition evaluates to %true (succeed) or
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* %false (@timeout elapsed).
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*
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* Return:
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* 0 - if the @condition evaluated to %false after the @timeout elapsed
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* 1 - if the @condition evaluated to %true
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*/
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#define wait_event_timeout(wq_head, condition, timeout) \
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({ \
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ulong __ret; \
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if (condition) \
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__ret = 1; \
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else \
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__ret = __wait_event_timeout(condition, timeout, __ret);\
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__ret; \
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})
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#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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/* This is also defined in ARMv8's mmu.h */
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/* This is also defined in ARMv8's mmu.h */
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