[lkml]   [2005]   [Jan]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] MMC block removable flag
    On Fri, Jan 07, 2005 at 03:00:35PM +0100, Andries Brouwer wrote:
    > On Fri, Jan 07, 2005 at 12:39:47PM +0000, Russell King wrote:
    > > Can anyone comment on the purpose of this (GENHD_FL_REMOVABLE) flag?
    > > Al? Jens?
    > GENHD_FL_REMOVABLE is set by a number of drivers (floppy, CDROM, ...).
    > It is used in two places:
    > (1) to fill the file /sys/block/*/removable
    > (2) in genhd to suppress listing a nonpartitioned removable device
    > in /proc/partitions.
    > In other words, it is for user space only, precisely as Pierre Ossman said.

    Your point 2 isn't user space though.

    Also, it's buggy. Consider a SCSI PCMCIA card with SCSI disks attached.
    When you eject that card, your SCSI disks disappear, yet they aren't
    marked as removable. If user space is relying on /sys/block/*/removable
    to tell it if things may go away, then user space is buggy.

    Maybe it's for devices which may be present (eg, floppy driver), but
    which have removable media (eg, floppy disk), rather than removable

    Russell King
    Linux kernel 2.6 ARM Linux -
    maintainer of: 2.6 PCMCIA -
    2.6 Serial core
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 14:09    [W:0.020 / U:17.516 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site