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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 20:53:53 +08:00
linux-next/include
Tejun Heo f47ad45784 percpu_ref: decouple switching to percpu mode and reinit
percpu_ref has treated the dropping of the base reference and
switching to atomic mode as an integral operation; however, there's
nothing inherent tying the two together.

The use cases for percpu_ref have been expanding continuously.  While
the current init/kill/reinit/exit model can cover a lot, the coupling
of kill/reinit with atomic/percpu mode switching is turning out to be
too restrictive for use cases where many percpu_refs are created and
destroyed back-to-back with only some of them reaching extended
operation.  The coupling also makes implementing always-atomic debug
mode difficult.

This patch separates out percpu mode switching into
percpu_ref_switch_to_percpu() and reimplements percpu_ref_reinit() on
top of it.

* DEAD still requires ATOMIC.  A dead ref can't be switched to percpu
  mode w/o going through reinit.

v2: __percpu_ref_switch_to_percpu() was missing static.  Fixed.
    Reported by Fengguang aka kbuild test robot.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: kbuild test robot <fengguang.wu@intel.com>
2014-09-24 13:31:49 -04:00
..
acpi PCI updates for v3.17: 2014-09-19 10:50:30 -07:00
asm-generic This is the bulk of GPIO changes for the v3.17 development 2014-08-08 18:00:35 -07:00
clocksource ARM: pxa: Add non device-tree timer link to clocksource 2014-07-23 12:02:39 +02:00
crypto crypto: drbg - backport "fix maximum value checks on 32 bit systems" 2014-09-05 15:52:28 +08:00
drm drm/radeon: add additional SI pci ids 2014-08-22 10:47:59 -04:00
dt-bindings Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
keys Merge remote-tracking branch 'integrity/next-with-keys' into keys-next 2014-07-22 21:54:43 +01:00
kvm KVM: ARM: vgic: add the GICv3 backend 2014-07-11 04:57:36 -07:00
linux percpu_ref: decouple switching to percpu mode and reinit 2014-09-24 13:31:49 -04:00
math-emu
media [media] media: atmel-isi: add v4l2 async probe support 2014-07-30 19:35:06 -03:00
memory
misc
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block into for-3.18 2014-09-24 13:00:21 -04:00
pcmcia
ras
rdma IB: ib_umem_release() should decrement mm->pinned_vm from ib_umem_get 2014-09-19 09:55:42 -07:00
rxrpc
scsi [SCSI] fix regression that accidentally disabled block-based tcq 2014-09-19 13:23:32 +01:00
soc/tegra ARM: tegra: Convert PMC to a driver 2014-07-17 14:58:43 +02:00
sound ASoC: core: fix .info for SND_SOC_BYTES_TLV 2014-08-18 08:59:12 -05:00
target
trace net: treewide: Fix typo found in DocBook/networking.xml 2014-09-05 17:35:28 -07:00
uapi USB fixes for 3.17-rc5 2014-09-12 11:59:10 -07:00
video fbdev changes for 3.17 2014-08-08 18:09:33 -07:00
xen xen/arm: introduce XENFEAT_grant_map_identity 2014-09-11 18:11:52 +00:00
Kbuild