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| author |   Michal Hocko <mhocko@suse.com> | 2017-11-15 17:39:14 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-15 18:21:07 -0800 |
| commit | 0205f75571e3a70c35f0dd5e608773cce97d9dbb (patch) | |
| tree | 165da7db9ac71e5340d08f6534663e16886a2424 /include/linux/nodemask.h | |
| parent | mm,oom_reaper: remove pointless kthread_run() error check (diff) | |
| download | linux-dev-0205f75571e3a70c35f0dd5e608773cce97d9dbb.tar.xz linux-dev-0205f75571e3a70c35f0dd5e608773cce97d9dbb.zip | |
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>
Diffstat (limited to 'include/linux/nodemask.h')
| -rw-r--r-- | include/linux/nodemask.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h index de1c50b93c61..15cab3967d6d 100644 --- a/include/linux/nodemask.h +++ b/include/linux/nodemask.h @@ -104,7 +104,9 @@ extern nodemask_t _unused_nodemask_arg_; * * Can be used to provide arguments for '%*pb[l]' when printing a nodemask. */ -#define nodemask_pr_args(maskp) MAX_NUMNODES, (maskp)->bits +#define nodemask_pr_args(maskp) \ + ((maskp) != NULL) ? MAX_NUMNODES : 0, \ + ((maskp) != NULL) ? (maskp)->bits : NULL /* * The inline keyword gives the compiler room to decide to inline, or |