WSL2-Linux-Kernel/drivers/input
Alexey Dobriyan 99b7623380 proc 2/2: remove struct proc_dir_entry::owner
Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy
as correctly noted at bug #12454. Someone can lookup entry with NULL
->owner, thus not pinning enything, and release it later resulting
in module refcount underflow.

We can keep ->owner and supply it at registration time like ->proc_fops
and ->data.

But this leaves ->owner as easy-manipulative field (just one C assignment)
and somebody will forget to unpin previous/pin current module when
switching ->owner. ->proc_fops is declared as "const" which should give
some thoughts.

->read_proc/->write_proc were just fixed to not require ->owner for
protection.

rmmod'ed directories will be empty and return "." and ".." -- no harm.
And directories with tricky enough readdir and lookup shouldn't be modular.
We definitely don't want such modular code.

Removing ->owner will also make PDE smaller.

So, let's nuke it.

Kudos to Jeff Layton for reminding about this, let's say, oversight.

http://bugzilla.kernel.org/show_bug.cgi?id=12454

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-03-31 01:14:44 +04:00
..
gameport Input: struct device - replace bus_id with dev_name(), dev_set_name() 2008-10-30 09:29:05 -04:00
joystick sh: maple: Support block reads and writes. 2009-02-27 16:07:32 +09:00
keyboard Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
misc input: PCF50633 input driver 2009-01-11 01:34:25 +01:00
mouse Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
serio Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
tablet Input: gtco - use USB endpoint API 2008-12-30 01:09:55 -08:00
touchscreen Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel 2009-03-13 21:44:51 +00:00
Kconfig xen pvfb: Para-virtual framebuffer, keyboard and pointer driver 2008-04-24 23:57:33 +02:00
Makefile Input: refactor evdev 32bit compat to be shareable with uinput 2008-10-27 22:03:42 -04:00
apm-power.c Input: apm-power - fix crash when unloading modules 2008-03-24 11:02:06 -04:00
evbug.c Input: struct device - replace bus_id with dev_name(), dev_set_name() 2008-10-30 09:29:05 -04:00
evdev.c Rationalize fasync return values 2009-03-16 08:34:35 -06:00
ff-core.c drivers/input/ff-core.c needs <linux/sched.h> 2008-07-02 18:40:08 -07:00
ff-memless.c input: replace spin_lock_bh with spin_lock_irqsave in ml_ff_playback 2008-11-30 10:36:51 -08:00
fixp-arith.h changed email 2007-10-20 00:47:32 +02:00
input-compat.c Input: refactor evdev 32bit compat to be shareable with uinput 2008-10-27 22:03:42 -04:00
input-compat.h Input: refactor evdev 32bit compat to be shareable with uinput 2008-10-27 22:03:42 -04:00
input-polldev.c Input: remove private member from input_dev structure 2008-04-02 00:41:00 -04:00
input.c proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
joydev.c Rationalize fasync return values 2009-03-16 08:34:35 -06:00
mousedev.c Rationalize fasync return values 2009-03-16 08:34:35 -06:00
xen-kbdfront.c get xenbus_driver ->probe() "recognized" by modpost 2008-11-30 10:03:38 -08:00