Minchan Kim 9e07f4e243 zram: close udev startup race condition as default groups ... commit fef912bf86 upstream. commit 98af4d4df8 upstream. I got a report from Howard Chen that he saw zram and sysfs race(ie, zram block device file is created but sysfs for it isn't yet) when he tried to create new zram devices via hotadd knob. v4.20 kernel fixes it by [1, 2] but it's too large size to merge into -stable so this patch fixes the problem by registering defualt group by Greg KH's approach[3]. This patch should be applied to every stable tree [3.16+] currently existing from kernel.org because the problem was introduced at 2.6.37 by [4]. [1] fef912bf86, block: genhd: add 'groups' argument to device_add_disk [2] 98af4d4df8, zram: register default groups with device_add_disk() [3] http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/ [4] 33863c21e6, Staging: zram: Replace ioctls with sysfs interface Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Hannes Reinecke <hare@suse.com> Tested-by: Howard Chen <howardsoc@google.com> Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2018-11-21 09:19:15 +01:00
..
Kconfig	zram: introduce zram memory tracking	2018-06-07 17:34:34 -07:00
Makefile	zram: delete custom lzo/lz4	2016-07-26 16:19:19 -07:00
zcomp.c	zram: remove zlib from the list of recommended algorithms	2017-11-15 18:21:03 -08:00
zcomp.h	zram: Convert to hotplug state machine	2016-12-02 00:52:39 +01:00
zram_drv.c	zram: close udev startup race condition as default groups	2018-11-21 09:19:15 +01:00
zram_drv.h	zram: introduce zram memory tracking	2018-06-07 17:34:34 -07:00