From: Gilad Ben-Yossef Date: Wed, 28 Mar 2012 21:42:43 +0000 (-0700) Subject: smp: add func to IPI cpus based on parameter func X-Git-Tag: v3.4-rc1~53^2~28 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b3a7e98e024ffa9f7e4554dd720c508015c4a831;p=pandora-kernel.git 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 Cc: Chris Metcalf Cc: Christoph Lameter Acked-by: Peter Zijlstra Cc: Frederic Weisbecker Cc: Russell King Cc: Pekka Enberg Cc: Matt Mackall Cc: Sasha Levin Cc: Rik van Riel Cc: Andi Kleen Cc: Alexander Viro Cc: Avi Kivity Acked-by: Michal Nazarewicz Cc: Kosaki Motohiro Cc: Milton Miller Reviewed-by: "Srivatsa S. Bhat" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed