From: Michal Hocko <mhocko@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>, Hugh Dickins <hughd@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
Christoph Lameter <cl@linux.com>,
Mel Gorman <mgorman@techsingularity.net>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: unhide vmstat_text definition for CONFIG_SMP
Date: Mon, 16 May 2016 16:23:33 +0200 [thread overview]
Message-ID: <20160516142332.GL23146@dhcp22.suse.cz> (raw)
In-Reply-To: <1462978517-2972312-1-git-send-email-arnd@arndb.de>
Andrew, I think that the following is more straightforward fix and
should be folded in to the patch which has introduced vmstat_refresh.
---
>From b8dd18fb7df040e1bfe61aadde1d903589de15e4 Mon Sep 17 00:00:00 2001
From: Michal Hocko <mhocko@suse.com>
Date: Mon, 16 May 2016 16:19:53 +0200
Subject: [PATCH] mmotm: mm-proc-sys-vm-stat_refresh-to-force-vmstat-update-fix
Arnd has reported:
In randconfig builds with sysfs, procfs and numa all disabled,
but SMP enabled, we now get a link error in the newly introduced
vmstat_refresh function:
mm/built-in.o: In function `vmstat_refresh':
:(.text+0x15c78): undefined reference to `vmstat_text'
vmstat_refresh is proc_fs specific so there is no reason to define it
when !CONFIG_PROC_FS.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Michal Hocko <mhocko@suse.com>
---
mm/vmstat.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 57a24e919907..c759b526287b 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1370,6 +1370,7 @@ static void refresh_vm_stats(struct work_struct *work)
refresh_cpu_vm_stats(true);
}
+#ifdef CONFIG_PROC_FS
int vmstat_refresh(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
@@ -1422,6 +1423,7 @@ int vmstat_refresh(struct ctl_table *table, int write,
*lenp = 0;
return 0;
}
+#endif
static void vmstat_update(struct work_struct *w)
{
--
2.8.1
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2016-05-16 14:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-11 14:54 [PATCH] mm: unhide vmstat_text definition for CONFIG_SMP Arnd Bergmann
2016-05-11 15:32 ` Christoph Lameter
2016-05-16 7:31 ` Michal Hocko
2016-05-17 5:31 ` Do not build vmstat_refresh if there is no procfs support kbuild test robot
2016-05-16 7:37 ` [PATCH] mm: unhide vmstat_text definition for CONFIG_SMP Michal Hocko
2016-05-16 13:54 ` Christoph Lameter
2016-05-16 14:23 ` Michal Hocko [this message]
2016-05-16 22:36 ` Andrew Morton
2016-05-17 7:05 ` Michal Hocko
2016-05-18 1:02 ` Hugh Dickins
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