linux/include
Joern Engel 33940d0993 target: encapsulate smp_mb__after_atomic()
The target code has a rather generous helping of smp_mb__after_atomic()
throughout the code base.  Most atomic operations were followed by one
and none were preceded by smp_mb__before_atomic(), nor accompanied by a
comment explaining the need for a barrier.

Instead of trying to prove for every case whether or not it is needed,
this patch introduces atomic_inc_mb() and atomic_dec_mb(), which
explicitly include the memory barriers before and after the atomic
operation.  For now they are defined in a target header, although they
could be of general use.

Most of the existing atomic/mb combinations were replaced by the new
helpers.  In a few cases the atomic was sandwiched in
spin_lock/spin_unlock and I simply removed the barrier.

I suspect that in most cases the correct conversion would have been to
drop the barrier.  I also suspect that a few cases exist where a) the
barrier was necessary and b) a second barrier before the atomic would
have been necessary and got added by this patch.

Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-10-01 14:39:06 -07:00
..
acpi ACPI / scan: not cache _SUN value in struct acpi_device_pnp 2014-09-03 22:41:14 +02:00
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 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2014-08-06 08:06:39 -07:00
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
linux vfs: avoid non-forwarding large load after small store in path lookup 2014-09-14 17:28:32 -07:00
math-emu
media [media] media: atmel-isi: add v4l2 async probe support 2014-07-30 19:35:06 -03:00
memory
misc
net Merge tag 'master-2014-09-04' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-09-07 16:11:10 -07:00
pcmcia
ras
rdma Merge branches 'core', 'cxgb4', 'ipoib', 'iser', 'iwcm', 'mad', 'misc', 'mlx4', 'mlx5', 'ocrdma' and 'srp' into for-next 2014-08-14 08:58:04 -07:00
rxrpc
scsi SCSI misc on 20140815 2014-08-15 18:28:58 -06:00
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 target: encapsulate smp_mb__after_atomic() 2014-10-01 14:39:06 -07:00
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