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Gilad Ben-Yossef b3a7e98e02 smp: add func to IPI cpus based on parameter func 
Add the on_each_cpu_cond() function that wraps on_each_cpu_mask() and
calculates the cpumask of cpus to IPI by calling a function supplied as a
parameter in order to determine whether to IPI each specific cpu.

The function works around allocation failure of cpumask variable in
CONFIG_CPUMASK_OFFSTACK=y by itereating over cpus sending an IPI a time
via smp_call_function_single().

The function is useful since it allows to seperate the specific code that
decided in each case whether to IPI a specific cpu for a specific request
from the common boilerplate code of handling creating the mask, handling
failures etc.

[akpm@linux-foundation.org: s/gfpflags/gfp_flags/]
[akpm@linux-foundation.org: avoid double-evaluation of `info' (per Michal), parenthesise evaluation of `cond_func']
[akpm@linux-foundation.org: s/CPU/CPUs, use all 80 cols in comment]
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Avi Kivity <avi@redhat.com>
Acked-by: Michal Nazarewicz <mina86@mina86.org>
Cc: Kosaki Motohiro <kosaki.motohiro@gmail.com>
Cc: Milton Miller <miltonm@bga.com>
Reviewed-by: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
..
acpi
asm-generic The following text was taken from the original review request: 2012-03-24 10:08:39 -07:00
crypto crypto: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:16 +08:00
drm The following text was taken from the original review request: 2012-03-24 10:08:39 -07:00
keys
linux smp: add func to IPI cpus based on parameter func 2012-03-28 17:14:35 -07:00
math-emu
media The following text was taken from the original review request: 2012-03-24 10:41:37 -07:00
misc
mtd
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-03-27 16:52:32 -07:00
pcmcia
rdma Merge branches 'cma', 'cxgb3', 'cxgb4', 'ehca', 'iser', 'mad', 'nes', 'qib', 'srp' and 'srpt' into for-next 2012-03-19 09:50:33 -07:00
rxrpc
scsi The following text was taken from the original review request: 2012-03-24 10:41:37 -07:00
sound The following text was taken from the original review request: 2012-03-24 10:41:37 -07:00
target target: Use array_zalloc for device_list 2012-03-15 19:15:51 -07:00
trace Ext4 commits for 3.3 merge window; mostly cleanups and bug fixes 2012-03-28 10:02:55 -07:00
video Merge branch 'platforms' of git://git.linaro.org/people/rmk/linux-arm 2012-03-27 18:17:02 -07:00
xen One tiny feature that accidentally got lost in the initial git pull: 2012-03-24 12:20:25 -07:00
Kbuild