Daniel Vetter
f00b4dad9d
dma-buf: implement vmap refcounting in the interface logic ...
All drivers which implement this need to have some sort of refcount to
allow concurrent vmap usage. Hence implement this in the dma-buf core.
To protect against concurrent calls we need a lock, which potentially
causes new funny locking inversions. But this shouldn't be a problem
for exporters with statically allocated backing storage, and more
dynamic drivers have decent issues already anyway.
Inspired by some refactoring patches from Aaron Plattner, who
implemented the same idea, but only for drm/prime drivers.
v2: Check in dma_buf_release that no dangling vmaps are left.
Suggested by Aaron Plattner. We might want to do similar checks for
attachments, but that's for another patch. Also fix up ERR_PTR return
for vmap.
v3: Check whether the passed-in vmap address matches with the cached
one for vunmap. Eventually we might want to remove that parameter -
compared to the kmap functions there's no need for the vaddr for
unmapping. Suggested by Chris Wilson.
v4: Fix a brown-paper-bag bug spotted by Aaron Plattner.
Cc: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Aaron Plattner <aplattner@nvidia.com>
Tested-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Rob Clark <rob@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
2013-02-27 15:13:36 +05:30
Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
2013-02-26 09:24:48 -08:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
2013-02-08 13:16:17 -05:00
arm-soc: soc-specific updates
2013-02-21 15:27:22 -08:00
extcon: gpio: Rename filename of extcon-gpio.c according to kernel naming style
2013-02-13 08:35:43 -08:00
mfd: twl-core: Move twl_i2c_read/write_u8 to header as inline function
2013-02-14 00:22:52 +01:00
iio:triggers Protect functions in triggers.h from use when not compiled
2013-02-09 15:22:14 +00:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2013-02-20 11:00:43 -08:00
ARM: gic: add __ASSEMBLY__ guard to C definitions
2013-02-11 18:58:34 +00:00
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
MMC highlights for 3.9:
2013-02-26 09:31:09 -08:00
Main batch of InfiniBand/RDMA changes for 3.9:
2013-02-26 11:41:08 -08:00
mmc: sh_mobile_sdhi: remove unused .pdata field
2013-02-24 14:37:22 -05:00
nfsd: Store ex_anon_uid and ex_anon_gid as kuids and kgids
2013-02-13 06:16:08 -08:00
pinctrl: generic: rename input schmitt disable
2013-02-15 09:52:29 +01:00
IOMMU Updates for Linux v3.9
2013-02-26 11:09:17 -08:00
bq2415x_charger: Add support for offline and 100mA mode
2013-02-16 13:34:10 -08:00
sched: move RR_TIMESLICE from sysctl.h to rt.h
2013-02-22 09:20:11 -08:00
Staging tree update for 3.9-rc1
2013-02-21 12:11:44 -08:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
2013-02-08 13:16:17 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-02-25 16:00:49 -08:00
arm-soc: soc-specific updates
2013-02-21 15:27:22 -08:00
acpi, memory-hotplug: parse SRAT before memblock is ready
2013-02-23 17:50:14 -08:00
bdi: allow block devices to say that they require stable page writes
2013-02-21 17:22:19 -08:00
fs/exec.c: make bprm_mm_init() static
2013-02-26 02:46:13 -05:00
Input: bma150 - make some defines public and fix some comments
2013-02-15 18:52:45 -08:00
memory-hotplug: common APIs to support page tables hot-remove
2013-02-23 17:50:12 -08:00
bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG
2013-02-21 17:22:16 -08:00
coda: Restrict coda messages to the initial user namespace
2013-02-13 06:00:53 -08:00
mm: compaction: make __compact_pgdat() and compact_pgdat() return void
2013-02-23 17:50:10 -08:00
burying unused conditionals
2013-02-14 09:21:15 -05:00
compiler-gcc.h: Add gcc-recommended GCC_VERSION macro
2013-02-21 17:22:15 -08:00
compiler-gcc{3,4}.h: Use GCC_VERSION macro
2013-02-21 17:22:15 -08:00
compiler{,-gcc4}.h, bug.h: Remove duplicate macros
2013-02-21 17:22:15 -08:00
bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG
2013-02-21 17:22:16 -08:00
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2013-02-25 16:46:44 -08:00
cpuidle: remove vestage definition of cpuidle_state_usage.driver_data
2013-02-11 18:49:51 -05:00
vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
2013-02-26 02:46:09 -05:00
Driver core patches for 3.9-rc1
2013-02-21 12:05:51 -08:00
dma-buf: implement vmap refcounting in the interface logic
2013-02-27 15:13:36 +05:30
dmaengine.h: remove redundant else keyword
2013-02-14 20:00:53 +05:30
A few fixes to reduce places where pstore might hang
2013-02-21 09:38:18 -08:00
default SET_PERSONALITY() in linux/elf.h
2013-02-26 02:46:08 -05:00
memory-hotplug: remove /sys/firmware/memmap/X sysfs
2013-02-23 17:50:12 -08:00
suspend: enable freeze timeout configuration through sys
2013-02-09 22:32:48 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
new helper: file_inode(file)
2013-02-22 23:31:31 -05:00
block: fix part_pack_uuid() build error
2013-02-26 03:10:52 +11:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-02-19 18:19:48 -08:00
video: Add generic HDMI infoframe helpers
2013-02-22 08:20:05 +01:00
Merge branches 'for-3.9/logitech', 'for-3.9/multitouch', 'for-3.9/ntrig', 'for-3.9/thingm' and 'for-3.9/upstream' into for-linus
2013-02-21 10:45:01 +01:00
mm: remove unused memclear_highpage_flush()
2013-02-23 17:50:16 -08:00
mm/rmap: rename anon_vma_unlock() => anon_vma_unlock_write()
2013-02-23 17:50:17 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
locking: Various static lock initializer fixes
2013-02-19 08:42:45 +01:00
mac80211: advertise operating mode notification capability
2013-02-15 09:41:42 +01:00
macvlan: add multicast filter
2013-02-06 15:59:47 -05:00
team: allow userspace to take control over carrier
2013-02-06 15:48:09 -05:00
vlan: adjust vlan_set_encap_proto() for its callers
2013-02-23 21:00:06 -05:00
ipv6: by default join ff01::1 and in case of forwarding ff01::2 and ff05:2
2013-02-11 14:16:26 -05:00
sched/rt: Add <linux/sched/rt.h> header to <linux/init_task.h>
2013-02-19 08:06:01 +01:00
iommu: Add DOMAIN_ATTR_WINDOWS domain attribute
2013-02-06 10:47:28 +01:00
jbd2: use module parameters instead of debugfs for jbd_debug
2013-02-09 16:29:20 -05:00
ksm: remove old stable nodes more thoroughly
2013-02-23 17:50:19 -08:00
Merge tag 'kvm-3.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2013-02-24 13:07:18 -08:00
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-02-22 19:25:09 -08:00
mm/memblock.c: use CONFIG_HAVE_MEMBLOCK_NODE_MAP to protect movablecore_map in memblock_overlaps_region().
2013-02-23 17:50:14 -08:00
mm: refactor inactive_file_is_low() to use get_lru_size()
2013-02-23 17:50:20 -08:00
memory-hotplug: export the function try_offline_node()
2013-02-23 17:50:13 -08:00
mm: remove offlining arg to migrate_pages
2013-02-23 17:50:19 -08:00
mm,ksm: FOLL_MIGRATION do migration_entry_wait
2013-02-23 17:50:23 -08:00
mm: fold page->_last_nid into page->flags where possible
2013-02-23 17:50:17 -08:00
mm: introduce VM_POPULATE flag to better deal with racy userspace programs
2013-02-23 17:50:11 -08:00
mmzone: add pgdat_{end_pfn,is_empty}() helpers & consolidate.
2013-02-23 17:50:20 -08:00
v4 GRE: Add TCP segmentation offload for GRE
2013-02-15 15:17:11 -05:00
net: fix a build failure when !CONFIG_PROC_FS
2013-02-19 13:18:13 -05:00
netpoll: Fix __netpoll_rcu_free so that it can hold the rtnl lock
2013-02-11 19:19:33 -05:00
nfsd: Handle kuids and kgids in the nfs4acl to posix_acl conversion
2013-02-13 06:16:06 -08:00
nfs: Convert idmap to use kuids and kgids
2013-02-13 06:15:29 -08:00
nfs: Convert struct nfs_fattr to Use kuid_t and kgid_t
2013-02-13 06:15:28 -08:00
of: Create function for counting number of phandles in a property
2013-02-13 10:09:31 +00:00
gpio: Make of_count_named_gpios() use new of_count_phandle_with_args()
2013-02-13 10:11:53 +00:00
PM / OPP: fix condition for empty of_init_opp_table()
2013-02-23 00:30:08 +01:00
mm: fold page->_last_nid into page->flags where possible
2013-02-23 17:50:17 -08:00
s390/mm: implement software dirty bits
2013-02-14 15:55:23 +01:00
mm: remove MIGRATE_ISOLATE check in hotpath
2013-02-23 17:50:15 -08:00
mm: only enforce stable page writes if the backing device requires it
2013-02-21 17:22:19 -08:00
PCI changes for the v3.9 merge window:
2013-02-25 21:18:18 -08:00
tty/serial patches for 3.9-rc1
2013-02-21 13:41:04 -08:00
perf: Introduce hw_perf_event->tp_target and ->tp_list
2013-02-08 18:28:02 +01:00
pm / runtime: introduce pm_runtime_set_memalloc_noio()
2013-02-23 17:50:16 -08:00
pm / runtime: introduce pm_runtime_set_memalloc_noio()
2013-02-23 17:50:16 -08:00
Driver core patches for 3.9-rc1
2013-02-21 12:05:51 -08:00
pps: Add pps_lookup_dev() function
2013-02-13 09:40:35 -08:00
Merge branch 'akpm' (incoming from Andrew)
2013-02-21 17:38:49 -08:00
tty/serial patches for 3.9-rc1
2013-02-21 13:41:04 -08:00
pwm: Changes for v3.9-rc1
2013-02-26 09:34:29 -08:00
spi/pxa2xx: add support for Intel Low Power Subsystem SPI
2013-02-08 13:14:40 +00:00
Merge remote-tracking branch 'regmap/topic/no-bus' into regmap-next
2013-02-14 17:11:09 +00:00
mm/rmap: rename anon_vma_unlock() => anon_vma_unlock_write()
2013-02-23 17:50:17 -08:00
Driver core patches for 3.9-rc1
2013-02-21 12:05:51 -08:00
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-02-26 19:42:08 -08:00
seqlock: Use seqcount infrastructure
2013-02-19 08:43:34 +01:00
pps: Move timestamp read into PPS code proper
2013-02-13 10:13:58 -08:00
v4 GRE: Add TCP segmentation offload for GRE
2013-02-15 15:17:11 -05:00
smp: make smp_call_function_many() use logic similar to smp_call_function_single()
2013-02-21 17:22:20 -08:00
smpboot: Allow selfparking per cpu threads
2013-02-14 15:29:37 +01:00
VSOCK: Introduce VM Sockets
2013-02-10 19:41:08 -05:00
srcu: Remove checks preventing idle CPUs from calling srcu_read_lock()
2013-02-07 15:15:00 -08:00
pps: Fix build breakage from decoupling pps from tty
2013-02-13 12:15:50 -08:00
PM: Introduce suspend state PM_SUSPEND_FREEZE
2013-02-09 22:30:44 +01:00
vmscan: change type of vm_total_pages to unsigned long
2013-02-23 17:50:22 -08:00
burying unused conditionals
2013-02-14 09:21:15 -05:00
tcp: adding a per-socket timestamp offset
2013-02-13 13:22:15 -05:00
arm-soc: cleanups
2013-02-21 14:58:40 -08:00
pps: Move timestamp read into PPS code proper
2013-02-13 10:13:58 -08:00
uprobes: Introduce uprobe_apply()
2013-02-08 18:28:04 +01:00
mfd: vexpress: Add pseudo-GPIO based LEDs
2013-02-14 00:22:58 +01:00
virtio: Add module driver macro for virtio drivers.
2013-02-13 17:00:32 +10:30
mm: don't wait on congested zones in balance_pgdat()
2013-02-23 17:50:15 -08:00
mm: numa: handle side-effects in count_vm_numa_events() for !CONFIG_NUMA_BALANCING
2013-02-23 17:50:16 -08:00
Merge branch 'console-fixes' into drm-next
2013-02-08 12:13:43 +10:00
wlcore: move wl12xx_platform_data up and make it truly optional
2013-02-08 10:05:02 +02:00
workqueue: rename cpu_workqueue to pool_workqueue
2013-02-13 19:29:12 -08:00
