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b51d23e4e9
linux_dsm_epyc7002/drivers/video/fbdev
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Dan Streetman b51d23e4e9 module: add per-module param_lock 
Add a "param_lock" mutex to each module, and update params.c to use
the correct built-in or module mutex while locking kernel params.
Remove the kparam_block_sysfs_r/w() macros, replace them with direct
calls to kernel_param_[un]lock(module).

The kernel param code currently uses a single mutex to protect
modification of any and all kernel params.  While this generally works,
there is one specific problem with it; a module callback function
cannot safely load another module, i.e. with request_module() or even
with indirect calls such as crypto_has_alg().  If the module to be
loaded has any of its params configured (e.g. with a /etc/modprobe.d/*
config file), then the attempt will result in a deadlock between the
first module param callback waiting for modprobe, and modprobe trying to
lock the single kernel param mutex to set the new module's param.

This fixes that by using per-module mutexes, so that each individual module
is protected against concurrent changes in its own kernel params, but is
not blocked by changes to other module params.  All built-in modules
continue to use the built-in mutex, since they will always be loaded at
runtime and references (e.g. request_module(), crypto_has_alg()) to them
will never cause load-time param changing.

This also simplifies the interface used by modules to block sysfs access
to their params; while there are currently functions to block and unblock
sysfs param access which are split up by read and write and expect a single
kernel param to be passed, their actual operation is identical and applies
to all params, not just the one passed to them; they simply lock and unlock
the global param mutex.  They are replaced with direct calls to
kernel_param_[un]lock(THIS_MODULE), which locks THIS_MODULE's param_lock, or
if the module is built-in, it locks the built-in mutex.

Suggested-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2015-06-23 15:27:38 +09:30
..
aty fbdev: radeon: replace PPC_OF with PPC 2015-03-17 20:04:31 +11:00
core fbdev: remove the unnecessary includes of ppc specific header files 2015-03-17 20:04:32 +11:00
exynos Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
geode fbdev: geocode: remove unneeded NULL check 2015-01-13 13:29:22 +02:00
i810 video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
intelfb video: fbdev: intelfb: delete double assignment 2014-08-26 15:53:34 +03:00
kyro video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
matrox video: fbdev: matrox: use c99 initializers in structures 2014-08-26 15:52:38 +03:00
mb862xx video: fbdev: mb862xx: drop owner assignment from platform_drivers 2014-10-20 16:21:52 +02:00
mbx video/mbx: indent some if statements 2014-07-01 13:32:30 +03:00
mmp video/mmpfb: allow modular build 2015-01-30 09:45:20 +02:00
msm msm: msm_fb: Move to using managed resources of kzalloc 2014-08-26 15:53:33 +03:00
nvidia fbdev: nvidia: remove the dependency on PPC_OF 2015-03-17 20:04:32 +11:00
omap video: fbdev: omap: drop owner assignment from platform_drivers 2014-10-20 16:21:54 +02:00
omap2 fbdev changes for v4.1 2015-04-20 15:16:25 -07:00
riva fbdev: riva: remove the dependency on PPC_OF 2015-03-17 20:04:32 +11:00
savage fbdev: savage: remove unused variable 2015-01-13 13:31:51 +02:00
sis video: fbdev-SIS: Deletion of unnecessary checks before the function call "pci_dev_put" 2014-12-04 16:16:01 +02:00
vermilion x86: Use new cache mode type in drivers/video/fbdev/vermilion 2014-11-16 11:04:25 +01:00
via fbdev: via/via_clock: fix sparse warning 2015-03-02 13:17:25 +02:00
68328fb.c video: 68328fb: remove check for CONFIG_FB_68328_INVERT 2014-06-24 10:55:13 +03:00
acornfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
acornfb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
amba-clcd-versatile.c video: move Versatile CLCD helpers 2014-06-27 10:15:22 +02:00
amba-clcd.c video: ARM CLCD: Add missing error check for devm_kzalloc 2015-02-26 10:23:15 +02:00
amifb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
arcfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
arkfb.c video: fbdev: arkfb: suppress build warning 2014-12-04 15:41:18 +02:00
asiliantfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
atafb_iplan2p2.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
atafb_iplan2p4.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
atafb_iplan2p8.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
atafb_mfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
atafb_utils.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
atafb.c video: atafb: Remove obsolete IRQ_TYPE_PRIO 2015-01-15 13:44:51 +01:00
atafb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
atmel_lcdfb.c Merge branch 'platform/remove_owner' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-next 2014-11-03 19:53:56 -08:00
au1100fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
au1100fb.h MIPS: Alchemy: au1100fb: use clk framework 2014-07-30 14:10:39 +02:00
au1200fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
au1200fb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
auo_k190x.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
auo_k190x.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
auo_k1900fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
auo_k1901fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
bf54x-lq043fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
bf537-lq035.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
bfin_adv7393fb.c fb: adv7393: add missing semicolon 2014-07-01 13:18:38 +03:00
bfin_adv7393fb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
bfin-lq035q1-fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
bfin-t350mcqb-fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
broadsheetfb.c fbdev/broadsheetfb: fix memory leak 2015-01-13 15:13:45 +02:00
bt431.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
bt455.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
bw2.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
c2p_core.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
c2p_iplan2.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
c2p_planar.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
c2p.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
carminefb_regs.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
carminefb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
carminefb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
cg3.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
cg6.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
cg14.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
chipsfb.c fbdev: Remove __init from chips_hw_init() to fix build failure 2014-08-26 12:48:34 +03:00
cirrusfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
clps711x-fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
clps711xfb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
cobalt_lcdfb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
controlfb.c powerpc: Move Power Macintosh drivers to generic byteswappers 2015-03-23 14:29:40 +11:00
controlfb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
cyber2000fb.c video: fbdev: cyber2000fb.c: use container_of to resolve cfb_info from fb_info 2014-09-30 13:06:01 +03:00
cyber2000fb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
da8xx-fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
dnfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
edid.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
efifb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
ep93xx-fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
fb-puv3.c drivers/video/fbdev/fb-puv3.c: Add header files for function unifb_mmap 2014-05-23 13:51:10 +03:00
ffb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
fm2fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
fsl-diu-fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
g364fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
gbefb.c x86: Use new cache mode type in drivers/video/fbdev/gbefb.c 2014-11-16 11:04:25 +01:00
goldfishfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
grvga.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
gxt4500.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
hecubafb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
hgafb.c video: hgafb: remove unneeded comparison 2015-01-26 14:43:06 +02:00
hitfb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
hpfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
hyperv_fb.c hyperv: hyperv_fb: match wait_for_completion_timeout return type 2015-03-10 14:37:46 +02:00
i740_reg.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
i740fb.c PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
igafb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
imsttfb.c fbdev: imsttfb: remove the dependency on PPC_OF 2015-03-17 20:04:31 +11:00
imxfb.c video: fbdev: make of_device_id array const 2015-03-02 13:17:24 +02:00
jz4740_fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
Kconfig fbdev: kconfig: replace PPC_OF with PPC 2015-03-17 20:04:32 +11:00
leo.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
macfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
macmodes.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
macmodes.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
Makefile fbdev changes for 3.17 2014-08-08 18:09:33 -07:00
maxinefb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
metronomefb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
mx3fb.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
mxsfb.c fbdev: mxsfb: Add support for mx6sl and mx6sx 2014-11-06 16:41:36 +02:00
n411.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
neofb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
nuc900fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
nuc900fb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
ocfb.c video: ocfb: Fix data type warning 2015-01-13 12:53:25 +02:00
offb.c Revert "offb: Add palette hack for little endian" 2014-06-16 19:45:45 +10:00
p9100.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
platinumfb.c powerpc: Move Power Macintosh drivers to generic byteswappers 2015-03-23 14:29:40 +11:00
platinumfb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
pm2fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
pm3fb.c fbdev: pm3fb: cleanup some confusing indenting 2015-03-10 14:47:09 +02:00
pmag-aa-fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
pmag-ba-fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
pmagb-b-fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
ps3fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
pvr2fb.c mm: gup: use get_user_pages_unlocked 2015-02-11 17:06:05 -08:00
pxa3xx-gcu.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
pxa3xx-gcu.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
pxa168fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
pxa168fb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
pxafb.c video: fbdev: use msecs_to_jiffies for time conversions 2015-03-10 14:32:13 +02:00
pxafb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
q40fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
s1d13xxxfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
s3c2410fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
s3c2410fb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
s3c-fb.c More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
s3fb.c video: fbdev: s3fb: suppress build warning 2014-12-04 15:41:18 +02:00
sa1100fb.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
sa1100fb.h ARM: 8244/1: fbdev: sa1100fb: make use of device clock 2014-12-05 16:30:25 +00:00
sbuslib.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
sbuslib.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
sh7760fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
sh_mipi_dsi.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
sh_mobile_hdmi.c fbdev: sh_mobile_hdmi: Re-init regs before irq re-enable on resume 2014-09-30 13:42:13 +03:00
sh_mobile_lcdcfb.c fbdev: sh_mobile_lcdc: Fix destruction of uninitialized mutex 2015-04-07 16:24:15 +03:00
sh_mobile_lcdcfb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
sh_mobile_meram.c More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
simplefb.c simplefb: Fix build failure on Sparc 2015-01-13 13:25:16 +02:00
skeletonfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
sm501fb.c fbdev: sm501fb: use memset_io 2015-03-02 13:17:24 +02:00
smscufx.c video: smscufx: Deletion of unnecessary checks before the function call "vfree" 2014-12-04 16:16:01 +02:00
ssd1307fb.c fbdev: ssd1307fb: return proper error code if write command fails 2015-01-30 09:40:00 +02:00
sstfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
sticore.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
stifb.c video: fbdev: stifb.c: use container_of to resolve stifb_info from fb_info 2014-09-30 13:06:00 +03:00
sunxvr500.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
sunxvr1000.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
sunxvr2500.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
tcx.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
tdfxfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
tgafb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
tmiofb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
tridentfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
udlfb.c video: udlfb: Deletion of unnecessary checks before the function call "vfree" 2014-12-04 16:16:01 +02:00
uvesafb.c kernel/params: constify struct kernel_param_ops uses 2015-05-28 11:32:10 +09:30
valkyriefb.c video: fbdev: valkyriefb.c: use container_of to resolve fb_info_valkyrie from fb_info 2014-09-30 13:06:01 +03:00
valkyriefb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
vesafb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
vfb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
vga16fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
vt8500lcdfb.c video: vt8500lcdfb: remove unneeded continue 2015-01-13 13:35:04 +02:00
vt8500lcdfb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
vt8623fb.c module: add per-module param_lock 2015-06-23 15:27:38 +09:30
w100fb.c video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
w100fb.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
wm8505fb_regs.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
wm8505fb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
wmt_ge_rops.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00
wmt_ge_rops.h video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
xen-fbfront.c xen: remove DEFINE_XENBUS_DRIVER() macro 2014-10-06 10:27:57 +01:00
xilinxfb.c video: fbdev: drop owner assignment from platform_drivers 2014-10-20 16:21:51 +02:00