linux-kernel - [PATCH 1/7] memory: Remove the now superfluous sentinel element from ctl

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Message-Id: <20240328-jag-sysctl_remset_misc-v1-1-47c1463b3af2@samsung.com>
Date: Thu, 28 Mar 2024 16:57:48 +0100
From: Joel Granados via B4 Relay <devnull+j.granados.samsung.com@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>, 
 Muchun Song <muchun.song@...ux.dev>, Miaohe Lin <linmiaohe@...wei.com>, 
 Naoya Horiguchi <naoya.horiguchi@....com>, 
 John Johansen <john.johansen@...onical.com>, 
 Paul Moore <paul@...l-moore.com>, James Morris <jmorris@...ei.org>, 
 "Serge E. Hallyn" <serge@...lyn.com>, David Howells <dhowells@...hat.com>, 
 Jarkko Sakkinen <jarkko@...nel.org>, Kees Cook <keescook@...omium.org>, 
 Herbert Xu <herbert@...dor.apana.org.au>, 
 "David S. Miller" <davem@...emloft.net>, Jens Axboe <axboe@...nel.dk>, 
 Pavel Begunkov <asml.silence@...il.com>, 
 Atish Patra <atishp@...shpatra.org>, Anup Patel <anup@...infault.org>, 
 Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>
Cc: Luis Chamberlain <mcgrof@...nel.org>, linux-mm@...ck.org, 
 linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
 apparmor@...ts.ubuntu.com, linux-security-module@...r.kernel.org, 
 keyrings@...r.kernel.org, linux-crypto@...r.kernel.org, 
 io-uring@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Joel Granados <j.granados@...sung.com>
Subject: [PATCH 1/7] memory: Remove the now superfluous sentinel element
 from ctl_table array

From: Joel Granados <j.granados@...sung.com>

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which will
reduce the overall build time size of the kernel and run time memory
bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

Remove sentinel from all files under mm/ that register a sysctl table.

Signed-off-by: Joel Granados <j.granados@...sung.com>
---
 mm/compaction.c      | 1 -
 mm/hugetlb.c         | 1 -
 mm/hugetlb_vmemmap.c | 1 -
 mm/memory-failure.c  | 1 -
 mm/oom_kill.c        | 1 -
 mm/page-writeback.c  | 1 -
 mm/page_alloc.c      | 1 -
 7 files changed, 7 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 807b58e6eb68..e8a047afca22 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -3345,7 +3345,6 @@ static struct ctl_table vm_compaction[] = {
 		.extra1		= SYSCTL_ZERO,
 		.extra2		= SYSCTL_ONE,
 	},
-	{ }
 };

 static int __init kcompactd_init(void)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 23ef240ba48a..7ac5240a197d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5045,7 +5045,6 @@ static struct ctl_table hugetlb_table[] = {
 		.mode		= 0644,
 		.proc_handler	= hugetlb_overcommit_handler,
 	},
-	{ }
 };

 static void hugetlb_sysctl_init(void)
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index da177e49d956..b9a55322e52c 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -679,7 +679,6 @@ static struct ctl_table hugetlb_vmemmap_sysctls[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dobool,
 	},
-	{ }
 };

 static int __init hugetlb_vmemmap_init(void)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 9349948f1abf..6a112f9ecf91 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -141,7 +141,6 @@ static struct ctl_table memory_failure_table[] = {
 		.extra1		= SYSCTL_ZERO,
 		.extra2		= SYSCTL_ONE,
 	},
-	{ }
 };

 /*
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 8d6a207c3c59..4d7a0004df2c 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -724,7 +724,6 @@ static struct ctl_table vm_oom_kill_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
-	{}
 };
 #endif

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 3e19b87049db..fba324e1a010 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2291,7 +2291,6 @@ static struct ctl_table vm_page_writeback_sysctls[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
 	},
-	{}
 };
 #endif

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 14d39f34d336..8b9820620fe3 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6211,7 +6211,6 @@ static struct ctl_table page_alloc_sysctl_table[] = {
 		.extra2		= SYSCTL_ONE_HUNDRED,
 	},
 #endif
-	{}
 };

 void __init page_alloc_sysctl_init(void)

-- 
2.43.0