* [PATCH] mm: compaction: fix compiler warning when CONFIG_COMPACTION=n
@ 2022-03-18 13:01 Charan Teja Kalla
2022-03-18 15:11 ` Vlastimil Babka
0 siblings, 1 reply; 2+ messages in thread
From: Charan Teja Kalla @ 2022-03-18 13:01 UTC (permalink / raw)
To: akpm, nigupta, vbabka; +Cc: linux-mm, linux-kernel, Charan Teja Kalla
The below warning is reported when CONFIG_COMPACTION=n:
mm/compaction.c:56:27: warning: 'HPAGE_FRAG_CHECK_INTERVAL_MSEC'
defined but not used [-Wunused-const-variable=]
56 | static const unsigned int HPAGE_FRAG_CHECK_INTERVAL_MSEC =
500;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix it by moving 'HPAGE_FRAG_CHECK_INTERVAL_MSEC' under
CONFIG_COMPACTION defconfig. Also since this is just a 'static const
int' type, use #define for it.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Charan Teja Kalla <quic_charante@quicinc.com>
---
mm/compaction.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index b4e94cd..4d86d04 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -26,6 +26,11 @@
#include "internal.h"
#ifdef CONFIG_COMPACTION
+/*
+ * Fragmentation score check interval for proactive compaction purposes.
+ */
+#define HPAGE_FRAG_CHECK_INTERVAL_MSEC (500)
+
static inline void count_compact_event(enum vm_event_item item)
{
count_vm_event(item);
@@ -51,11 +56,6 @@ static inline void count_compact_events(enum vm_event_item item, long delta)
#define pageblock_end_pfn(pfn) block_end_pfn(pfn, pageblock_order)
/*
- * Fragmentation score check interval for proactive compaction purposes.
- */
-static const unsigned int HPAGE_FRAG_CHECK_INTERVAL_MSEC = 500;
-
-/*
* Page order with-respect-to which proactive compaction
* calculates external fragmentation, which is used as
* the "fragmentation score" of a node/zone.
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] mm: compaction: fix compiler warning when CONFIG_COMPACTION=n
2022-03-18 13:01 [PATCH] mm: compaction: fix compiler warning when CONFIG_COMPACTION=n Charan Teja Kalla
@ 2022-03-18 15:11 ` Vlastimil Babka
0 siblings, 0 replies; 2+ messages in thread
From: Vlastimil Babka @ 2022-03-18 15:11 UTC (permalink / raw)
To: Charan Teja Kalla, akpm, nigupta; +Cc: linux-mm, linux-kernel
On 3/18/22 14:01, Charan Teja Kalla wrote:
> The below warning is reported when CONFIG_COMPACTION=n:
>
> mm/compaction.c:56:27: warning: 'HPAGE_FRAG_CHECK_INTERVAL_MSEC'
> defined but not used [-Wunused-const-variable=]
> 56 | static const unsigned int HPAGE_FRAG_CHECK_INTERVAL_MSEC =
> 500;
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Fix it by moving 'HPAGE_FRAG_CHECK_INTERVAL_MSEC' under
> CONFIG_COMPACTION defconfig. Also since this is just a 'static const
> int' type, use #define for it.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Charan Teja Kalla <quic_charante@quicinc.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
> ---
> mm/compaction.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/mm/compaction.c b/mm/compaction.c
> index b4e94cd..4d86d04 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -26,6 +26,11 @@
> #include "internal.h"
>
> #ifdef CONFIG_COMPACTION
> +/*
> + * Fragmentation score check interval for proactive compaction purposes.
> + */
> +#define HPAGE_FRAG_CHECK_INTERVAL_MSEC (500)
> +
> static inline void count_compact_event(enum vm_event_item item)
> {
> count_vm_event(item);
> @@ -51,11 +56,6 @@ static inline void count_compact_events(enum vm_event_item item, long delta)
> #define pageblock_end_pfn(pfn) block_end_pfn(pfn, pageblock_order)
>
> /*
> - * Fragmentation score check interval for proactive compaction purposes.
> - */
> -static const unsigned int HPAGE_FRAG_CHECK_INTERVAL_MSEC = 500;
> -
> -/*
> * Page order with-respect-to which proactive compaction
> * calculates external fragmentation, which is used as
> * the "fragmentation score" of a node/zone.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-03-18 13:01 [PATCH] mm: compaction: fix compiler warning when CONFIG_COMPACTION=n Charan Teja Kalla
2022-03-18 15:11 ` Vlastimil Babka
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