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David Herrmann 0cdbe8ac69 drm/gem: remove misleading gfp parameter to get_pages() 
drm_gem_get_pages() currently allows passing a 'gfp' parameter that is
passed to shmem combined with mapping_gfp_mask(). Given that the default
mapping_gfp_mask() is GFP_HIGHUSER, it is _very_ unlikely that anyone will
ever make use of that parameter. In fact, all drivers currently pass
redundant flags or 0.

This patch removes the 'gfp' parameter. The only reason to keep it is to
remove flags like __GFP_WAIT. But in its current form, it can only be used
to add flags. So to remove __GFP_WAIT, you'd have to drop it from the
mapping_gfp_mask, which again is stupid as this mask is used by shmem-core
for other allocations, too.

If any driver ever requires that parameter, we can introduce a new helper
that takes the raw 'gfp' parameter. The caller'd be responsible to combine
it with mapping_gfp_mask() in a suitable way. The current
drm_gem_get_pages() helper would then simply use mapping_gfp_mask() and
call the new helper. This is what shmem_read_mapping_pages{_gfp,} does
right now.

Moreover, the gfp-zone flag-usage is not obvious: If you pass a modified
zone, shmem core will WARN() or even BUG(). In other words, the following
must be true for 'gfp' passed to shmem_read_mapping_pages_gfp():
    gfp_zone(mapping_gfp_mask(mapping)) == gfp_zone(gfp)
Add a comment to drm_gem_read_pages() explaining that constraint.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
2014-07-08 00:29:53 +02:00
..
accessibility
acpi ACPI / thermal: fix workqueue destroy order 2014-05-26 14:34:07 +02:00
amba ARM: SoC: driver changes 2014-04-05 15:37:40 -07:00
ata libata: Blacklist queued trim for Crucial M500 2014-06-02 16:59:25 -07:00
atm atm: idt77105: Use del_timer_sync() in exit path 2014-03-25 21:06:02 -04:00
auxdisplay
base drivercore: deferral race condition fix 2014-04-29 15:44:05 +01:00
bcma bcma: gpio: register 32 GPIOs on BCM5357 2014-03-27 14:20:04 -04:00
block virtio_blk: fix race between start and stop queue 2014-05-27 08:41:10 -06:00
bluetooth Bluetooth: Add support for Lite-on [04ca:3007] 2014-04-25 09:47:16 +03:00
bus bus: mvebu-mbus: allow several windows with the same target/attribute 2014-04-24 03:48:08 +00:00
cdrom
char This fixes a BUG_ON-causing regression that was introduced during the 2014-05-21 18:56:35 +09:00
clk PLLE fixes for 3.15 2014-05-27 21:11:08 -07:00
clocksource clocksource: tcb_clksrc: Make tc_mode interrupt safe 2014-05-22 18:54:58 +02:00
connector net: Use netlink_ns_capable to verify the permisions of netlink messages 2014-04-24 13:44:54 -04:00
cpufreq Merge branches 'pm-cpufreq' and 'acpi-thermal' 2014-05-26 23:20:16 +02:00
cpuidle Merge branch 'pm-cpuidle' 2014-04-08 13:27:40 +02:00
crypto crypto: caam - add allocation failure handling in SPRINTFCAT macro 2014-04-28 18:17:18 +08:00
dca
devfreq PM / devfreq: Rewrite devfreq_update_status() to fix multiple bugs 2014-03-21 11:16:30 +09:00
dio
dma Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2014-05-27 13:57:00 -07:00
edac Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2014-04-04 09:50:07 -07:00
eisa
extcon extcon: Move OF helper function to extcon core and change function name 2014-03-19 14:41:58 +09:00
firewire firewire: revert to 4 GB RDMA, fix protocols using Memory Space 2014-05-29 15:50:30 +02:00
firmware iscsi_ibft: Fix finding Broadcom specific ibft sign 2014-05-13 14:54:14 -04:00
fmc
gpio gpio: mcp23s08: Bug fix of SPI device tree registration. 2014-05-09 10:28:16 +02:00
gpu drm/gem: remove misleading gfp parameter to get_pages() 2014-07-08 00:29:53 +02:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-05-07 16:07:58 -07:00
hsi
hv Drivers: hv: vmbus: Negotiate version 3.0 when running on ws2012r2 hosts 2014-04-16 14:14:07 -07:00
hwmon hwmon: (ntc_thermistor) Fix OF device ID mapping 2014-05-25 17:23:08 +02:00
hwspinlock
i2c i2c: rcar: bail out on zero length transfers 2014-05-14 18:59:57 +02:00
ide
idle intel_idle: fix IVT idle state table setting 2014-04-21 23:36:07 +02:00
iio iio: adc: Nothing in ADC should be a bool CONFIG 2014-04-26 11:22:16 +01:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-05-23 15:29:43 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-05-30 12:07:48 -07:00
iommu iommu/amd: fix enabling exclusion range for an exact device 2014-05-13 12:33:12 +02:00
ipack
irqchip mvebu irqchip ifxes for v3.15 2014-04-29 19:23:22 +02:00
isdn hisax/icc: add missing semicolon after label 2014-04-22 21:22:47 -04:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-04-10 09:06:10 -07:00
lguest drivers/lguest/page_tables.c: rename do_set_pte() 2014-04-07 16:35:52 -07:00
macintosh
mailbox
mcb drivers: mcb: fix memory leak in chameleon_parse_cells() error path 2014-04-16 12:28:47 -07:00
md Two md bugfixes for possible corruption when restarting reshape 2014-06-02 17:04:37 -07:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2014-05-21 19:01:08 +09:00
memory memory: mvebu-devbus: fix the conversion of the bus width 2014-04-17 04:14:30 +00:00
memstick
message PCI changes for the v3.15 merge window: 2014-04-01 15:14:04 -07:00
mfd mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post_req" 2014-05-08 08:44:50 +01:00
misc misc: Grammar s/addition/additional/ 2014-04-16 12:28:47 -07:00
mmc mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post_req" 2014-05-08 08:44:50 +01:00
mtd MTD update for 3.15-rc5 2014-05-07 16:28:52 -07:00
net net: ec_bhf: Add runtime dependencies 2014-06-02 17:02:28 -07:00
nfc
ntb ntb: Use pci_enable_msix_range() instead of pci_enable_msix() 2014-04-07 10:59:20 -07:00
nubus
of of: make of_update_property() usable earlier in the boot process 2014-05-14 15:27:36 +01:00
oprofile oprofile, nmi-timer: Fix CPU hotplug callback registration 2014-03-20 13:43:46 +01:00
parisc
parport
pci PCI updates for v3.15: 2014-05-21 18:57:25 +09:00
pcmcia PCI changes for the v3.15 merge window: 2014-04-01 15:14:04 -07:00
phy phy: fix kernel oops in phy_lookup() 2014-04-24 12:53:38 -07:00
pinctrl pinctrl: vt8500: Ensure value reg is updated when setting direction 2014-05-22 23:46:10 +02:00
platform alienware-wmi: cover some scenarios where memory allocations would fail 2014-04-10 12:11:56 -04:00
pnp asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/* 2014-05-05 16:07:46 -07:00
power power/reset: vexpress: Fix restart/power off operation 2014-04-24 17:20:50 +01:00
powercap CPU hotplug notifiers registration fixes for 3.15-rc1 2014-04-07 14:55:46 -07:00
pps
ps3
ptp ptp: fix kconfig dependency warnings 2014-05-12 00:27:26 -04:00
pwm Shiraz has moved 2014-04-18 16:40:08 -07:00
rapidio rapidio: rework device hierarchy and introduce mport class of devices 2014-04-07 16:36:07 -07:00
regulator regulator: pbias: Convert to use regmap helper functions 2014-04-14 22:16:25 +01:00
remoteproc
reset Merge branch 'reset/for_v3.15' of git://git.pengutronix.de/git/pza/linux into next/drivers 2014-03-27 01:28:19 +01:00
rpmsg
rtc drivers/rtc/rtc-hym8563.c: set uie_unsupported 2014-05-11 17:55:48 +09:00
s390 s390/chsc: fix SEI usage on old FW levels 2014-04-17 12:46:28 +02:00
sbus
scsi SCSI fixes on 20140524 2014-05-25 10:13:50 -07:00
sfi
sh drivers: sh: compile drivers/sh/pm_runtime.c if ARCH_SHMOBILE_MULTI 2014-05-12 16:05:01 +09:00
sn
spi Merge remote-tracking branches 'spi/fix/pxa2xx' and 'spi/fix/qup' into spi-linus 2014-05-13 19:08:34 +01:00
spmi
ssb
staging Merge branch 'topic/ipu-destaging' of git://git.pengutronix.de/git/pza/linux into drm-next 2014-06-11 10:13:58 +10:00
target target: fix memory leak on XCOPY 2014-05-17 15:49:40 -07:00
tc
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2014-04-10 09:15:46 -07:00
tty Staging: speakup: Update __speakup_paste_selection() tty (ab)usage to match vt 2014-05-24 02:25:11 +09:00
uio
usb xhci: delete endpoints from bandwidth list before freeing whole device 2014-05-28 14:53:53 -07:00
uwb uwb: don't call spin_unlock_irq in a USB completion handler 2014-04-24 12:45:40 -07:00
vfio VFIO updates for v3.15 include: 2014-04-03 14:05:02 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-04-12 16:51:08 -07:00
video gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging 2014-06-04 11:06:52 +02:00
virt
virtio
vlynq
vme vme_tsi148: Utilize to_pci_dev() macro 2014-04-16 14:08:37 -07:00
w1 w1: avoid recursive device_add 2014-04-16 14:07:51 -07:00
watchdog CPU hotplug notifiers registration fixes for 3.15-rc1 2014-04-07 14:55:46 -07:00
xen Xen bug fixes for 3.15-rc5 2014-05-13 11:21:01 +09:00
zorro
Kconfig
Makefile SH Driver Update for v3.15 2014-05-22 04:26:23 +09:00