AcoSail/kernel_optimize_test
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Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  ide: unexport DISK_EVENT_MEDIA_CHANGE for ide-gd and ide-cd
  block: don't propagate unlisted DISK_EVENTs to userland
  elevator: check for ELEVATOR_INSERT_SORT_MERGE in !elvpriv case too
This commit is contained in:
Linus Torvalds 2011-04-21 10:50:56 -07:00
commit 91e8549bde
5 changed files with 20 additions and 5 deletions
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3
block/elevator.c
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@ -671,7 +671,8 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
q->boundary_rq = rq;
}
} else if (!(rq->cmd_flags & REQ_ELVPRIV) &&
where == ELEVATOR_INSERT_SORT)
(where == ELEVATOR_INSERT_SORT ||
where == ELEVATOR_INSERT_SORT_MERGE))
where = ELEVATOR_INSERT_BACK;
switch (where) {

8
block/genhd.c
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@ -1588,9 +1588,13 @@ static void disk_events_workfn(struct work_struct *work)
spin_unlock_irq(&ev->lock);
/* tell userland about new events */
/*
* Tell userland about new events. Only the events listed in
* @disk->events are reported. Unlisted events are processed the
* same internally but never get reported to userland.
*/
for (i = 0; i < ARRAY_SIZE(disk_uevents); i++)
if (events & (1 << i))
if (events & disk->events & (1 << i))
envp[nr_events++] = disk_uevents[i];
if (nr_events)

1
drivers/ide/ide-cd.c
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@ -1782,7 +1782,6 @@ static int ide_cd_probe(ide_drive_t *drive)
ide_cd_read_toc(drive, &sense);
g->fops = &idecd_ops;
g->flags |= GENHD_FL_REMOVABLE;
g->events = DISK_EVENT_MEDIA_CHANGE;
add_disk(g);
return 0;

6
drivers/ide/ide-cd_ioctl.c
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@ -79,6 +79,12 @@ int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
return CDS_DRIVE_NOT_READY;
}
/*
* ide-cd always generates media changed event if media is missing, which
* makes it impossible to use for proper event reporting, so disk->events
* is cleared to 0 and the following function is used only to trigger
* revalidation and never propagated to userland.
*/
unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
unsigned int clearing, int slot_nr)
{

7
drivers/ide/ide-gd.c
View File

@ -298,6 +298,12 @@ static unsigned int ide_gd_check_events(struct gendisk *disk,
return 0;
}
/*
* The following is used to force revalidation on the first open on
* removeable devices, and never gets reported to userland as
* genhd->events is 0. This is intended as removeable ide disk
* can't really detect MEDIA_CHANGE events.
*/
ret = drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED;
drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
@ -413,7 +419,6 @@ static int ide_gd_probe(ide_drive_t *drive)
if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
g->flags = GENHD_FL_REMOVABLE;
g->fops = &ide_gd_ops;
g->events = DISK_EVENT_MEDIA_CHANGE;
add_disk(g);
return 0;