The subsystem rwsem is not used by the driver core at all, so the use of it in the ide-proc code of it doesn't make any sense. Perhaps a local lock might be needed, but I do not really think so. Cc: Bartlomiej Zolnierkiewicz <[email protected]> Cc: linux ide <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/ide/ide-proc.c | 4 ---- 1 files changed, 0 insertions(+), 4 deletions(-) diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c index afb71c6..a9e0b30 100644 --- a/drivers/ide/ide-proc.c +++ b/drivers/ide/ide-proc.c @@ -310,14 +310,12 @@ static int proc_ide_read_driver ide_driver_t *ide_drv; int len; - down_read(&dev->bus->subsys.rwsem); if (dev->driver) { ide_drv = container_of(dev->driver, ide_driver_t, gen_driver); len = sprintf(page, "%s version %s\n", dev->driver->name, ide_drv->version); } else len = sprintf(page, "ide-default version 0.9.newide\n"); - up_read(&dev->bus->subsys.rwsem); PROC_IDE_READ_RETURN(page,start,off,count,eof,len); } @@ -327,7 +325,6 @@ static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) int ret = 1; int err; - down_write(&dev->bus->subsys.rwsem); device_release_driver(dev); /* FIXME: device can still be in use by previous driver */ strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); @@ -345,7 +342,6 @@ static int ide_replace_subdriver(ide_drive_t *drive, const char *driver) } if (dev->driver && !strcmp(dev->driver->name, driver)) ret = 0; - up_write(&dev->bus->subsys.rwsem); return ret; } -- 1.5.1.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Follow-Ups:
- [PATCH 27/46] IEEE1394: remove rwsem use from ieee1394 core
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 27/46] IEEE1394: remove rwsem use from ieee1394 core
- References:
- [GIT PATCH] Driver core patches for 2.6.21
- From: Greg KH <[email protected]>
- [PATCH 01/46] driver core: fix device_add error path
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 02/46] driver core: fix namespace issue with devices assigned to classes
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 03/46] dev_printk and new-style class devices
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 05/46] driver core: Use attribute groups in struct device_type
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 06/46] Driver core: add name to device_type
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 07/46] kobject: kobject_shadow_add cleanup
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 08/46] driver core: per-subsystem multithreaded probing
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 09/46] powerpc: make it compile for multithread change
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 10/46] driver core: don't fail attaching the device if it cannot be bound
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 11/46] Driver core: remove unneeded completion from driver release path
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 12/46] kref: fix CPU ordering with respect to krefs
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 13/46] Driver core: notify userspace of network device renames
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 14/46] Driver core: suppress uevents via filter
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 15/46] Driver core: switch firmware_class to uevent_suppress.
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 16/46] uevent: use add_uevent_var() instead of open coding it
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 17/46] Driver core: add suspend() and resume() to struct device_type
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 18/46] Kobject: kobject_uevent.c: Collapse unnecessary loop nesting (top_kobj)
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 19/46] kobject: kobject_add() reference leak
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 20/46] Driver core: remove use of rwsem
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 21/46] SCSI: use the proper semaphore to protect the class lists
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 22/46] USB: remove use of the bus rwsem, as it doesn't really protect anything.
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 23/46] PNP: stop using the subsystem rwsem
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 24/46] Input: serio - do not touch bus's rwsem
- From: Greg Kroah-Hartman <[email protected]>
- [PATCH 25/46] Input: gameport - do not touch bus's rwsem
- From: Greg Kroah-Hartman <[email protected]>
- [GIT PATCH] Driver core patches for 2.6.21
- Prev by Date: [PATCH 32/46] Driver core: warn when userspace writes to the uevent file in a non-supported way
- Next by Date: [PATCH 25/46] Input: gameport - do not touch bus's rwsem
- Previous by thread: [PATCH 25/46] Input: gameport - do not touch bus's rwsem
- Next by thread: [PATCH 27/46] IEEE1394: remove rwsem use from ieee1394 core
- Index(es):