]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
jump_label: jump_label_inc may return before the code is patched
authorGleb Natapov <gleb@redhat.com>
Tue, 18 Oct 2011 17:55:51 +0000 (19:55 +0200)
committerSteven Rostedt <rostedt@goodmis.org>
Mon, 5 Dec 2011 18:28:46 +0000 (13:28 -0500)
commitbbbf7af4bf8fc69bc751818cf30521080fa47dcb
treebbc986e2013cdfeb3b99bacc2f5326b787b7e410
parentc7c6ec8becaf742b223c7b491f4893014be23a07
jump_label: jump_label_inc may return before the code is patched

If cpu A calls jump_label_inc() just after atomic_add_return() is
called by cpu B, atomic_inc_not_zero() will return value greater then
zero and jump_label_inc() will return to a caller before jump_label_update()
finishes its job on cpu B.

Link: http://lkml.kernel.org/r/20111018175551.GH17571@redhat.com
Cc: stable@vger.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/jump_label.c