proc: get_nr_threads() doesn't need ->siglock any longer
commit7e49827cc937a742ae02078b483e3eb78f791a2a
authorOleg Nesterov <oleg@redhat.com>
Wed, 26 May 2010 21:43:22 +0000 (26 14:43 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 27 May 2010 16:12:47 +0000 (27 09:12 -0700)
tree0f3e0a8483a41b2221c74b8286b2349af03dab04
parent6e1be45aa6ba6a36c0312f65ecf311135c73001d
proc: get_nr_threads() doesn't need ->siglock any longer

Now that task->signal can't go away get_nr_threads() doesn't need
->siglock to read signal->count.

Also, make it inline, move into sched.h, and convert 2 other proc users of
signal->count to use this (now trivial) helper.

Henceforth get_nr_threads() is the only valid user of signal->count, we
are ready to turn it into "int nr_threads" or, perhaps, kill it.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/proc/array.c
fs/proc/base.c
include/linux/sched.h