mm: simplify nodemask printing
authorMichal Hocko <mhocko@suse.com>
Thu, 16 Nov 2017 01:39:14 +0000 (17:39 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 16 Nov 2017 02:21:07 +0000 (18:21 -0800)
commit0205f75571e3a70c35f0dd5e608773cce97d9dbb
tree165da7db9ac71e5340d08f6534663e16886a2424
parentc50842c8e1cddcdb69d3ece4f4df005a0e6c5ceb
mm: simplify nodemask printing

alloc_warn() and dump_header() have to explicitly handle NULL nodemask
which forces both paths to use pr_cont.  We can do better.  printk
already handles NULL pointers properly so all we need is to teach
nodemask_pr_args to handle NULL nodemask carefully.  This allows
simplification of both alloc_warn() and dump_header() and gets rid of
pr_cont altogether.

This patch has been motivated by patch from Joe Perches

  http://lkml.kernel.org/r/b31236dfe3fc924054fd7842bde678e71d193638.1509991345.git.joe@perches.com

[akpm@linux-foundation.org: fix tile warning, per Arnd]
Link: http://lkml.kernel.org/r/20171109100531.3cn2hcqnuj7mjaju@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/nodemask.h
mm/oom_kill.c
mm/page_alloc.c