[PATCH] mm: hide a #warning for COMPILE_TEST

[PATCH] mm: hide a #warning for COMPILE_TEST

[Arnd Bergmann]

We get a warning about some slow configurations in randconfig kernels:

mm/memory.c:83:2: error: #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_cpupid. [-Werror=cpp]

The warning is reasonable by itself, but gets in the way of
randconfig build testing, so I'm hiding it whenever CONFIG_COMPILE_TEST
is set. The warning was added in 2013 in commit 75980e97dacc ("mm: fold
page->_last_nid into page->flags where possible").

Cc: stable@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index a728bed16c20..fc7779165dcf 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -81,7 +81,7 @@
 
 #include "internal.h"
 
-#ifdef LAST_CPUPID_NOT_IN_PAGE_FLAGS
+#if defined(LAST_CPUPID_NOT_IN_PAGE_FLAGS) && !defined(CONFIG_COMPILE_TEST)
 #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_cpupid.
 #endif
 
-- 
2.9.0

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Re: [PATCH] mm: hide a #warning for COMPILE_TEST

[Linus Torvalds]

On Fri, Feb 16, 2018 at 7:25 AM, Arnd Bergmann <arnd@arndb.de> wrote:
>
> The warning is reasonable by itself, but gets in the way of
> randconfig build testing, so I'm hiding it whenever CONFIG_COMPILE_TEST
> is set.

Ack, looks sane, so I just applied it directly to my tree instead of
waiting for this to get back to me from Andrew ;)

                 Linus

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