Staging
v0.8.1
v0.8.1
https://github.com/torvalds/linux
Revision 3e3183bab0257a6d02038658c53b491e1378612f authored by David Woodhouse on 05 August 2006, 19:15:19 UTC, committed by Linus Torvalds on 06 August 2006, 15:57:49 UTC
While busy-waiting for completion, check the hardware after scheduling; don't schedule and then immediately check the _timeout_. If the yield() took a long time (as it does on my OLPC prototype board when it's busy), we'd report a timeout even though the hardware was now ready. This fixes it, and also switches the yield() for a cond_resched() because we don't actually want to be _that_ nice about it. I see nice tightly-packed SMBus transactions now, rather than waiting for milliseconds between successive phases. Actually, we shouldn't be busy-waiting here at all. We should be using interrupts. That's an exercise for another day though. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Cc: Christer Weinigel <wingel@nano-system.com> Cc: <Jordan.Crouse@amd.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent 225add6
Tip revision: 3e3183bab0257a6d02038658c53b491e1378612f authored by David Woodhouse on 05 August 2006, 19:15:19 UTC
[PATCH] SCX200_ACB: eliminate spurious timeout errors
[PATCH] SCX200_ACB: eliminate spurious timeout errors
Tip revision: 3e3183b
kcopyd.h
/*
* Copyright (C) 2001 Sistina Software
*
* This file is released under the GPL.
*
* Kcopyd provides a simple interface for copying an area of one
* block-device to one or more other block-devices, with an asynchronous
* completion notification.
*/
#ifndef DM_KCOPYD_H
#define DM_KCOPYD_H
#include "dm-io.h"
/* FIXME: make this configurable */
#define KCOPYD_MAX_REGIONS 8
#define KCOPYD_IGNORE_ERROR 1
/*
* To use kcopyd you must first create a kcopyd client object.
*/
struct kcopyd_client;
int kcopyd_client_create(unsigned int num_pages, struct kcopyd_client **result);
void kcopyd_client_destroy(struct kcopyd_client *kc);
/*
* Submit a copy job to kcopyd. This is built on top of the
* previous three fns.
*
* read_err is a boolean,
* write_err is a bitset, with 1 bit for each destination region
*/
typedef void (*kcopyd_notify_fn)(int read_err,
unsigned int write_err, void *context);
int kcopyd_copy(struct kcopyd_client *kc, struct io_region *from,
unsigned int num_dests, struct io_region *dests,
unsigned int flags, kcopyd_notify_fn fn, void *context);
#endif
Computing file changes ...