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Subject[PATCH] mm/compaction: remove unused variable sysctl_compact_memory
Date
The sysctl_compact_memory is mostly unsed in mm/compaction.c
It just acts as a place holder for sysctl.

Thus we can remove it from here and move the declaration directly
in kernel/sysctl.c itself.
This will also eliminate the extern declaration from header file.
No functionality is broken or changed this way.

Signed-off-by: Pintu Kumar <pintu@codeaurora.org>
Signed-off-by: Pintu Agarwal <pintu.ping@gmail.com>
---
include/linux/compaction.h | 1 -
kernel/sysctl.c | 1 +
mm/compaction.c | 3 ---
3 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index ed4070e..4221888 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -81,7 +81,6 @@ static inline unsigned long compact_gap(unsigned int order)
}

#ifdef CONFIG_COMPACTION
-extern int sysctl_compact_memory;
extern unsigned int sysctl_compaction_proactiveness;
extern int sysctl_compaction_handler(struct ctl_table *table, int write,
void *buffer, size_t *length, loff_t *ppos);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index c9fbdd8..66aff21 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -198,6 +198,7 @@ static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
#ifdef CONFIG_COMPACTION
static int min_extfrag_threshold;
static int max_extfrag_threshold = 1000;
+static int sysctl_compact_memory;
#endif

#endif /* CONFIG_SYSCTL */
diff --git a/mm/compaction.c b/mm/compaction.c
index 190ccda..ede2886 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -2650,9 +2650,6 @@ static void compact_nodes(void)
compact_node(nid);
}

-/* The written value is actually unused, all memory is compacted */
-int sysctl_compact_memory;
-
/*
* Tunable for proactive compaction. It determines how
* aggressively the kernel should compact memory in the
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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