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23 October 2021, 00:29:24 UTC
Revision 747388d78a0ae768fd82b55c4ed38aa646a72364 authored by KAMEZAWA Hiroyuki on 11 May 2010, 21:06:59 UTC, committed by Linus Torvalds on 12 May 2010, 00:33:42 UTC 
memcg: fix css_is_ancestor() RCU locking
 
Some callers (in memcontrol.c) calls css_is_ancestor() without
rcu_read_lock.  Because css_is_ancestor() has to access RCU protected
data, it should be under rcu_read_lock().

This makes css_is_ancestor() itself does safe access to RCU protected
area.  (At least, "root" can have refcnt==0 if it's not an ancestor of
"child".  So, we need rcu_read_lock().)

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 7f0f154
Raw File
Tip revision: 747388d78a0ae768fd82b55c4ed38aa646a72364 authored by KAMEZAWA Hiroyuki on 11 May 2010, 21:06:59 UTC
memcg: fix css_is_ancestor() RCU locking
Tip revision: 747388d
profile2linkerlist.pl 
#!/usr/bin/perl

#
# Takes a (sorted) output of readprofile and turns it into a list suitable for
# linker scripts
#
# usage:
#	 readprofile | sort -rn | perl profile2linkerlist.pl > functionlist
#

while (<>) {
  my $line = $_;

  $_ =~ /\W*[0-9]+\W*([a-zA-Z\_0-9]+)\W*[0-9]+/;

  if ( ($line =~ /unknown/) || ($line =~ /total/)) {

  } else {
    print "*(.text.$1)\n";
  }
}
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